Y. Kantor, T. Molodtsova, Sofia Zvonareva, A. Fedosov
Abstract. The superfamily Buccinoidea is the most speciose group of Neogastropoda within the Antarctic Convergence, with ~70 species classified in 21 genera, but is still poorly represented in molecular phylogenies. The first molecular data on the group presented in the recent phylogeny of the Buccinoidea (Kantor et al. 2022) lacked many important lineages, thereby limiting inference of the relationships of Antarctic Buccinoidea. We revisited relationships of the Antarctic Buccinoidea, involving recently collected molecular-grade samples from the bathyal and abyssal depths of the Scotia Sea, the Weddel Sea and adjacent regions. Our data set includes 25 species (including six genera studied on a molecular basis for the first time), sequenced for five phylogenetic markers: the barcode fragment of cox1 gene, fragments of ribosomal 12S, 16S rRNA and 28S and nuclear H3 genes. Based on phylogenetic reconstructions, we synonymise the genus Lussitromina with Falsitromina and reassign the latter from Cominellidae to Prosiphonidae. We confirm the placement of four further genera, Drepanodontus, Germonea, Parabuccinum and Spikebuccinum in Prosiphonidae. We detect a previously unrecognised deep lineage of the family Prosiphonidae and describe this as the new genus Scotiabuccinum. The genus Parabuccinum, previously recorded in the Magellanic province and off the eastern coast of Argentina was reported for the first time within the Antarctic Convergence. We discover four previously unrecognised species of Antarctic Prosiphonidae and these are the first Buccinoidea from Antarctic waters described based on molecular data. According to our data, all but two species of Antarctic Buccinoidea belong to the family Prosiphonidae. Seven of the nineteen Recent Antarctic Prosiphonidae genera (36%) cross the boundaries of the Convergence and eight Antarctic genera are monotypic (42%). Currently no Buccinoidea species are known to occur both within and outside the Antarctic Convergence. ZooBank: urn:lsid:zoobank.org:pub:DEEA1599-C951-414E-9098-563EAD10BD57
{"title":"Taxonomy of Antarctic Buccinoidea (Gastropoda: Neogastropoda) revisited based on molecular data","authors":"Y. Kantor, T. Molodtsova, Sofia Zvonareva, A. Fedosov","doi":"10.1071/IS22064","DOIUrl":"https://doi.org/10.1071/IS22064","url":null,"abstract":"Abstract. The superfamily Buccinoidea is the most speciose group of Neogastropoda within the Antarctic Convergence, with ~70 species classified in 21 genera, but is still poorly represented in molecular phylogenies. The first molecular data on the group presented in the recent phylogeny of the Buccinoidea (Kantor et al. 2022) lacked many important lineages, thereby limiting inference of the relationships of Antarctic Buccinoidea. We revisited relationships of the Antarctic Buccinoidea, involving recently collected molecular-grade samples from the bathyal and abyssal depths of the Scotia Sea, the Weddel Sea and adjacent regions. Our data set includes 25 species (including six genera studied on a molecular basis for the first time), sequenced for five phylogenetic markers: the barcode fragment of cox1 gene, fragments of ribosomal 12S, 16S rRNA and 28S and nuclear H3 genes. Based on phylogenetic reconstructions, we synonymise the genus Lussitromina with Falsitromina and reassign the latter from Cominellidae to Prosiphonidae. We confirm the placement of four further genera, Drepanodontus, Germonea, Parabuccinum and Spikebuccinum in Prosiphonidae. We detect a previously unrecognised deep lineage of the family Prosiphonidae and describe this as the new genus Scotiabuccinum. The genus Parabuccinum, previously recorded in the Magellanic province and off the eastern coast of Argentina was reported for the first time within the Antarctic Convergence. We discover four previously unrecognised species of Antarctic Prosiphonidae and these are the first Buccinoidea from Antarctic waters described based on molecular data. According to our data, all but two species of Antarctic Buccinoidea belong to the family Prosiphonidae. Seven of the nineteen Recent Antarctic Prosiphonidae genera (36%) cross the boundaries of the Convergence and eight Antarctic genera are monotypic (42%). Currently no Buccinoidea species are known to occur both within and outside the Antarctic Convergence. ZooBank: urn:lsid:zoobank.org:pub:DEEA1599-C951-414E-9098-563EAD10BD57","PeriodicalId":54927,"journal":{"name":"Invertebrate Systematics","volume":"37 1","pages":"271 - 299"},"PeriodicalIF":2.2,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46033532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K. Tomikawa, Y. Kawasaki, Alfonso Miranda Leiva, Nilton Deza Arroyo
Abstract. In recent years, the impact of rising water temperatures associated with global warming on cold-water freshwater organisms has become a major issue, and understanding the physiological and ecological elements that support temperature limits is essential for the conservation biology of freshwater organisms. We describe a new species of thermophilic hyalellid amphipod, Hyalella yashmara sp. nov. from the Peruvian hot spring Baños del Inca Cajamarca and this could potentially contribute to understanding the high temperature preference of these. We found that this new species can live in water temperatures ranging from 19.8 to 52.1°C, that, to our knowledge, is the highest recorded habitat temperature of amphipods. Hyalella yashmara sp. nov. is most similar to H. meinerti Stebbing, 1899 from Peru. However, this new species differs from the latter in features of gnathopods 1 and 2, sternal gills, uropod 3 and telson. A detailed morphological comparison between Hyalella yashmara sp. nov. and Peruvian species is also provided. Our molecular phylogenetic analyses based on the nuclear 28S rRNA and mitochondrial cytochrome c oxidase subunit I (COI) gene sequences strongly support the monophyly of Hyalellidae (=Hyalella). Since Hyalellidae was found to form a sister group with Chiltoniidae, these two families were expected to have originated from a common ancestor that invaded freshwater habitats from marine environments when the continents of South America, Africa and Australia were united as Gondwana. Our findings suggest that the South American species of Hyalella are not monophyletic and that the North American species are likely to share a most recent common ancestor with H. yashmara sp. nov. ZooBank: urn:lsid:zoobank.org:act:190CFB16-7BE4-4786-A97F-0AFD8CD72DEA
{"title":"Description of a new thermal species of the genus Hyalella from Peru with molecular phylogeny of the family Hyalellidae (Crustacea, Amphipoda)","authors":"K. Tomikawa, Y. Kawasaki, Alfonso Miranda Leiva, Nilton Deza Arroyo","doi":"10.1071/IS22060","DOIUrl":"https://doi.org/10.1071/IS22060","url":null,"abstract":"Abstract. In recent years, the impact of rising water temperatures associated with global warming on cold-water freshwater organisms has become a major issue, and understanding the physiological and ecological elements that support temperature limits is essential for the conservation biology of freshwater organisms. We describe a new species of thermophilic hyalellid amphipod, Hyalella yashmara sp. nov. from the Peruvian hot spring Baños del Inca Cajamarca and this could potentially contribute to understanding the high temperature preference of these. We found that this new species can live in water temperatures ranging from 19.8 to 52.1°C, that, to our knowledge, is the highest recorded habitat temperature of amphipods. Hyalella yashmara sp. nov. is most similar to H. meinerti Stebbing, 1899 from Peru. However, this new species differs from the latter in features of gnathopods 1 and 2, sternal gills, uropod 3 and telson. A detailed morphological comparison between Hyalella yashmara sp. nov. and Peruvian species is also provided. Our molecular phylogenetic analyses based on the nuclear 28S rRNA and mitochondrial cytochrome c oxidase subunit I (COI) gene sequences strongly support the monophyly of Hyalellidae (=Hyalella). Since Hyalellidae was found to form a sister group with Chiltoniidae, these two families were expected to have originated from a common ancestor that invaded freshwater habitats from marine environments when the continents of South America, Africa and Australia were united as Gondwana. Our findings suggest that the South American species of Hyalella are not monophyletic and that the North American species are likely to share a most recent common ancestor with H. yashmara sp. nov. ZooBank: urn:lsid:zoobank.org:act:190CFB16-7BE4-4786-A97F-0AFD8CD72DEA","PeriodicalId":54927,"journal":{"name":"Invertebrate Systematics","volume":"37 1","pages":"254 - 270"},"PeriodicalIF":2.2,"publicationDate":"2023-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46724686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
W. Tomaszewska, Karol Szawaryn, Emmanuel Arriaga-Varela
Abstract. The genus Anamycetaea Strohecker, 1975, established for Anamycetaea keralae, a single species from India, was originally placed in the diverse endomychid subfamily Mycetaeinae and has subsequently been considered a member of the subfamily Anamorphinae based on closed mesocoxal cavities, a postulated synapomorphy of this group. Recent molecular research resulted in raising Anamorphinae to family level and revealed this group to be distantly related to Endomychidae sensu stricto. However, Anamycetaea has been ‘neglected’ since description. Our detailed study of this genus has been possible due to new material collected from Oriental and Australian regions. Striking overall similarity to the endomychine genus Tharina and a tentorium with anterior arms fused medially (separated in almost all Anamorphidae) have raised our doubts and led to further investigation of the phylogenetic placement of this enigmatic genus within Endomychidae sensu lato (handsome fungus beetles). Phylogenetic analyses of molecular and morphological datasets were conducted under Bayesian (BI), maximum likelihood (ML) and parsimony (MP) frameworks. Our results recovered Anamycetaea as belonging to the family Endomychidae, in the subfamily Endomychinae, distant from Anamorphidae. The close affinity to Stenotarsus and allies was strongly supported in all analyses. Based on material studied, A. keralae is described in detail here and includes description of previously unknown male genitalia. Four new species are also described, extending the ragne of the genus to the Australian region: Anamycetaea borneensis sp. nov. (from Borneo), A. novoguineensis sp. nov. and A. papuensis sp. nov. (from Papua New Guinea) and A. queenslandica sp. nov. (from Australia). Illustrations of morphological details and diagnoses are provided for each species. A key to the species of the genus is also presented. ZooBank: urn:lsid:zoobank.org:pub:90BAA954-7849-4FA9-997B-061FE7BB5702
{"title":"‘Where is my family?’ Molecular and morphological data reveal the phylogenetic position and diversity of the enigmatic handsome fungus beetle genus Anamycetaea Strohecker, 1975 (Coleoptera, Coccinelloidea)","authors":"W. Tomaszewska, Karol Szawaryn, Emmanuel Arriaga-Varela","doi":"10.1071/IS22053","DOIUrl":"https://doi.org/10.1071/IS22053","url":null,"abstract":"Abstract. The genus Anamycetaea Strohecker, 1975, established for Anamycetaea keralae, a single species from India, was originally placed in the diverse endomychid subfamily Mycetaeinae and has subsequently been considered a member of the subfamily Anamorphinae based on closed mesocoxal cavities, a postulated synapomorphy of this group. Recent molecular research resulted in raising Anamorphinae to family level and revealed this group to be distantly related to Endomychidae sensu stricto. However, Anamycetaea has been ‘neglected’ since description. Our detailed study of this genus has been possible due to new material collected from Oriental and Australian regions. Striking overall similarity to the endomychine genus Tharina and a tentorium with anterior arms fused medially (separated in almost all Anamorphidae) have raised our doubts and led to further investigation of the phylogenetic placement of this enigmatic genus within Endomychidae sensu lato (handsome fungus beetles). Phylogenetic analyses of molecular and morphological datasets were conducted under Bayesian (BI), maximum likelihood (ML) and parsimony (MP) frameworks. Our results recovered Anamycetaea as belonging to the family Endomychidae, in the subfamily Endomychinae, distant from Anamorphidae. The close affinity to Stenotarsus and allies was strongly supported in all analyses. Based on material studied, A. keralae is described in detail here and includes description of previously unknown male genitalia. Four new species are also described, extending the ragne of the genus to the Australian region: Anamycetaea borneensis sp. nov. (from Borneo), A. novoguineensis sp. nov. and A. papuensis sp. nov. (from Papua New Guinea) and A. queenslandica sp. nov. (from Australia). Illustrations of morphological details and diagnoses are provided for each species. A key to the species of the genus is also presented. ZooBank: urn:lsid:zoobank.org:pub:90BAA954-7849-4FA9-997B-061FE7BB5702","PeriodicalId":54927,"journal":{"name":"Invertebrate Systematics","volume":"37 1","pages":"231 - 253"},"PeriodicalIF":2.2,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46799157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pongpun Prasankok, C. Sutcharit, E. Jeratthitikul, T. Backeljau, Piyatida Pimvichai
ABSTRACT Snorkel snails (genus Rhiostoma) are widely distributed in Indo-China and on the Malay Peninsula. The shell morphology is traditionally used for species identification yet in Thailand, the common snorkel snail, Rhiostoma housei, shows considerable variation in shell morphology within and between populations. Therefore species identifications and delimitations are difficult. We used two mitochondrial DNA fragments (COI and 16S rRNA) and morphological characters to delimit species and infer phylogenetic relationships of Rhiostoma housei s.l. from eight localities in Thailand, representing potential cryptic species suggested by earlier allozyme and karyological data. Results revealed four distinct clades from different geographic areas in Thailand. Species delimitation analyses confirmed the clades as four separate species and a geometric morphometric analysis demonstrated subtle but consistent conchological differences between the four clades. The high COI sequence divergences among the four clades (mean: 14.8%; range: 10.3–16.5%) further supported the species level recognition. As a consequence, three new species are described from Thailand: R. khoratense, sp. nov., R. nakwangense, sp. nov. and R. phunangense, sp. nov. ZooBank: urn:lsid:zoobank.org:pub:EE534749-9346-4972-BF2E-3B5D0EB8AED8
{"title":"Molecular phylogeny of the snorkel snail Rhiostoma housei, a species complex from Thailand with descriptions of three new species","authors":"Pongpun Prasankok, C. Sutcharit, E. Jeratthitikul, T. Backeljau, Piyatida Pimvichai","doi":"10.1071/IS22037","DOIUrl":"https://doi.org/10.1071/IS22037","url":null,"abstract":"ABSTRACT Snorkel snails (genus Rhiostoma) are widely distributed in Indo-China and on the Malay Peninsula. The shell morphology is traditionally used for species identification yet in Thailand, the common snorkel snail, Rhiostoma housei, shows considerable variation in shell morphology within and between populations. Therefore species identifications and delimitations are difficult. We used two mitochondrial DNA fragments (COI and 16S rRNA) and morphological characters to delimit species and infer phylogenetic relationships of Rhiostoma housei s.l. from eight localities in Thailand, representing potential cryptic species suggested by earlier allozyme and karyological data. Results revealed four distinct clades from different geographic areas in Thailand. Species delimitation analyses confirmed the clades as four separate species and a geometric morphometric analysis demonstrated subtle but consistent conchological differences between the four clades. The high COI sequence divergences among the four clades (mean: 14.8%; range: 10.3–16.5%) further supported the species level recognition. As a consequence, three new species are described from Thailand: R. khoratense, sp. nov., R. nakwangense, sp. nov. and R. phunangense, sp. nov. ZooBank: urn:lsid:zoobank.org:pub:EE534749-9346-4972-BF2E-3B5D0EB8AED8","PeriodicalId":54927,"journal":{"name":"Invertebrate Systematics","volume":"37 1","pages":"211 - 229"},"PeriodicalIF":2.2,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41872751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Camille Leal, Sula Salani, F. C. de Moraes, R. L. de Moura, F. Thompson, E. Hajdu
ABSTRACT The taxonomic study of Great Amazon Reef System sponges yielded three Oceanapia-like (Phloeodictyidae, Haplosclerida) species of similar gross morphology, two preliminarily identified as O. bartschi and another as Coelocarteria (Poecilosclerida), due to the presence of common palmate isochelae. The remarkable overall similarity of all three species in gross morphology necessitated an integrative assessment of the phylogenetic affinities. A selection of haplosclerid and poecilosclerid sequences (18S and 28S rRNA) was gathered from Genbank and compared to sequences mapped to reference from metagenome of two Oceanapia-like species from the Amazon River mouth, one of which matched O. bartschi. Both Brazilian species clustered with Coelocarteria singaporensis (Singapore). These species nest in the Poecilosclerida, far from Oceanapia (sp. and isodictyiformis) and other haplosclerids (Amphimedon, Petrosia, Siphonodictyon and Xestospongia) but also far from the poecilosclerid Isodictya that is currently classified in the same family as Coelocarteria, the Isodictyidae. Specimens with chelae are named Coelocarteria alcoladoi sp. nov. herein, while those without chelae represent the other two species. One matched Inflatella bartschi (O. bartchi’s holotype, here re-examined), thereby supporting the transfer of this species to Coelocarteria. The other is proposed as C. amadoi sp. nov. and is the second known lipochelous species in this genus. The 28S phylogenies recovered Coelocarteria bartschi comb. nov. (formerly Oceanapia bartschi) in the Poecilosclerida clade that clustered with Coelocarteria spp., including the type species of this genus, C. singaporensis, with 100% support. Coelocarteria alcoladoi sp. nov., also without chelae, grouped in the same clade, thereby corroborating the classification in this genus. The clade composed of Coelocarteria spp. grouped with Cornulella sp., suggesting an affinity between these genera. Coelocarteria is currently situated within Isodictyidae and Cornulella in Acarnidae. Isodictya (Isodictyidae) grouped with Amphilectus (Esperiopsidae) with high support and is only distantly related to Coelocarteria. Acarnus (Acarnidae) grouped with Clathria, also with high support, far from Coelocarteria and Cornulella. These results suggest the polyphyletic nature of Isodictyidae and Acarnidae, for which reason we preferred to propose a new, currently monotypic family for Coelocarteria spp., Coelocarteriidae fam. nov. ZooBank: urn:lsid:zoobank.org:pub:71FDB6FD-4A5F-4180-8DA7-79EA4CB615D1
{"title":"Lost characters and lost taxonomists: Coelocarteriidae fam. nov., Poecilosclerida with and without chelae, to accommodate supposed phloeodictyids (Haplosclerida)","authors":"Camille Leal, Sula Salani, F. C. de Moraes, R. L. de Moura, F. Thompson, E. Hajdu","doi":"10.1071/IS22017","DOIUrl":"https://doi.org/10.1071/IS22017","url":null,"abstract":"ABSTRACT The taxonomic study of Great Amazon Reef System sponges yielded three Oceanapia-like (Phloeodictyidae, Haplosclerida) species of similar gross morphology, two preliminarily identified as O. bartschi and another as Coelocarteria (Poecilosclerida), due to the presence of common palmate isochelae. The remarkable overall similarity of all three species in gross morphology necessitated an integrative assessment of the phylogenetic affinities. A selection of haplosclerid and poecilosclerid sequences (18S and 28S rRNA) was gathered from Genbank and compared to sequences mapped to reference from metagenome of two Oceanapia-like species from the Amazon River mouth, one of which matched O. bartschi. Both Brazilian species clustered with Coelocarteria singaporensis (Singapore). These species nest in the Poecilosclerida, far from Oceanapia (sp. and isodictyiformis) and other haplosclerids (Amphimedon, Petrosia, Siphonodictyon and Xestospongia) but also far from the poecilosclerid Isodictya that is currently classified in the same family as Coelocarteria, the Isodictyidae. Specimens with chelae are named Coelocarteria alcoladoi sp. nov. herein, while those without chelae represent the other two species. One matched Inflatella bartschi (O. bartchi’s holotype, here re-examined), thereby supporting the transfer of this species to Coelocarteria. The other is proposed as C. amadoi sp. nov. and is the second known lipochelous species in this genus. The 28S phylogenies recovered Coelocarteria bartschi comb. nov. (formerly Oceanapia bartschi) in the Poecilosclerida clade that clustered with Coelocarteria spp., including the type species of this genus, C. singaporensis, with 100% support. Coelocarteria alcoladoi sp. nov., also without chelae, grouped in the same clade, thereby corroborating the classification in this genus. The clade composed of Coelocarteria spp. grouped with Cornulella sp., suggesting an affinity between these genera. Coelocarteria is currently situated within Isodictyidae and Cornulella in Acarnidae. Isodictya (Isodictyidae) grouped with Amphilectus (Esperiopsidae) with high support and is only distantly related to Coelocarteria. Acarnus (Acarnidae) grouped with Clathria, also with high support, far from Coelocarteria and Cornulella. These results suggest the polyphyletic nature of Isodictyidae and Acarnidae, for which reason we preferred to propose a new, currently monotypic family for Coelocarteria spp., Coelocarteriidae fam. nov. ZooBank: urn:lsid:zoobank.org:pub:71FDB6FD-4A5F-4180-8DA7-79EA4CB615D1","PeriodicalId":54927,"journal":{"name":"Invertebrate Systematics","volume":"37 1","pages":"192 - 210"},"PeriodicalIF":2.2,"publicationDate":"2023-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46617922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Georgieva, N. Rimskaya-Korsakova, Varvara I. Krolenko, C. V. Van Dover, D. Amon, J. Copley, Sophie Plouviez, Bernard Ball, H. Wiklund, A. Glover
ABSTRACT The vestimentiferan tubeworm genera Lamellibrachia and Escarpia inhabit deep-sea chemosynthesis-based ecosystems, such as seeps, hydrothermal vents and organic falls, and have wide distributions across the Pacific, Atlantic and Indian Oceans. In 2010–2012 during initial explorations of hydrothermal vents of the Mid-Cayman Spreading Centre (MCSC), both genera were found to co-occur at the Von Damm Vent Field (VDVF), a site characterised by diffuse flow, therefore resembling a ‘hydrothermal seep’. Here, we erect two new vestimentiferan tubeworm species from the VDVF, Lamellibrachia judigobini sp. nov. and Escarpia tritentaculata sp. nov. Lamellibrachia judigobini sp. nov. differs genetically and morphologically from other Lamellibrachia species, and has a range that extends across the Gulf of Mexico, MCSC, off Trinidad and Tobago, and Barbados, and also across both vents and seeps and 964–3304-m water depth. Escarpia tritentaculata sp. nov. is distinguished from other Escarpia species primarily based on morphology and is known only from vents of the MCSC at 2300-m depth. This study highlights the incredible habitat flexibility of a single Lamellibrachia species and the genus Escarpia, and historic biogeographic connections to the eastern Pacific for L. judigobini sp. nov. and the eastern Atlantic for E. tritentaculata sp. nov. ZooBank: urn:lsid:zoobank.org:pub:D9F72BD4-FDE1-4C0A-B84B-A08D06F2A981
{"title":"A tale of two tubeworms: taxonomy of vestimentiferans (Annelida: Siboglinidae) from the Mid-Cayman Spreading Centre","authors":"M. Georgieva, N. Rimskaya-Korsakova, Varvara I. Krolenko, C. V. Van Dover, D. Amon, J. Copley, Sophie Plouviez, Bernard Ball, H. Wiklund, A. Glover","doi":"10.1071/IS22047","DOIUrl":"https://doi.org/10.1071/IS22047","url":null,"abstract":"ABSTRACT The vestimentiferan tubeworm genera Lamellibrachia and Escarpia inhabit deep-sea chemosynthesis-based ecosystems, such as seeps, hydrothermal vents and organic falls, and have wide distributions across the Pacific, Atlantic and Indian Oceans. In 2010–2012 during initial explorations of hydrothermal vents of the Mid-Cayman Spreading Centre (MCSC), both genera were found to co-occur at the Von Damm Vent Field (VDVF), a site characterised by diffuse flow, therefore resembling a ‘hydrothermal seep’. Here, we erect two new vestimentiferan tubeworm species from the VDVF, Lamellibrachia judigobini sp. nov. and Escarpia tritentaculata sp. nov. Lamellibrachia judigobini sp. nov. differs genetically and morphologically from other Lamellibrachia species, and has a range that extends across the Gulf of Mexico, MCSC, off Trinidad and Tobago, and Barbados, and also across both vents and seeps and 964–3304-m water depth. Escarpia tritentaculata sp. nov. is distinguished from other Escarpia species primarily based on morphology and is known only from vents of the MCSC at 2300-m depth. This study highlights the incredible habitat flexibility of a single Lamellibrachia species and the genus Escarpia, and historic biogeographic connections to the eastern Pacific for L. judigobini sp. nov. and the eastern Atlantic for E. tritentaculata sp. nov. ZooBank: urn:lsid:zoobank.org:pub:D9F72BD4-FDE1-4C0A-B84B-A08D06F2A981","PeriodicalId":54927,"journal":{"name":"Invertebrate Systematics","volume":"37 1","pages":"167 - 191"},"PeriodicalIF":2.2,"publicationDate":"2023-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48794057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract. Freshwater mussels are essential for the integrity of freshwater ecosystems but numbers of these organisms are declining rapidly at regional and global scales. The phylogenetic and biogeographic aspects of the rich unionoid fauna of the Indo-Burma region are becoming increasingly well understood. Guangxi is part of the Chinese portion of the Indo-Burma biodiversity hotspot but regional studies of the freshwater mussel diversity are scarce. In this study, we report a new genus and species of freshwater mussel from Guangxi, China. Genetic datasets including three genes (COI, 16S rRNA and 28S rRNA) and complete maternal mitogenomes were compiled to infer the phylogenetic history of the group. Molecular phylogenetic analyses showed that the new species formed a monophyletic group and was closely related to Obovalis and Ptychorhynchus in the tribe Gonideini of the subfamily Gonideinae. Morphological and molecular evidence supported that these specimens represent an undescribed genus and species that we describe as Postolata guangxiensis gen. nov., sp. nov. The discovery of this new taxon adds to the known level of endemism of freshwater mussels in Guangxi and a detailed survey of uncharted areas should reveal new diversity in the future. We also suggest that complete mitogenomes or even genome-scale nuclear data should be used for phylogenetic reconstructions when proposing major taxonomic changes. ZooBank: urn:lsid:zoobank.org:pub:76FC5A1D-7507-4F26-A12C-EC08AB333274
{"title":"Multilocus and mitogenomic phylogenetic analyses reveal a new genus and species of freshwater mussel (Bivalvia: Unionidae) from Guangxi, China","authors":"Yu-Ting Dai, Xiao‐Chen Huang, Chengxi Wu, Zhongming Chen, Liang Guo, Feng-yue Shu, S. Ouyang, Xiaoping Wu","doi":"10.1071/IS22048","DOIUrl":"https://doi.org/10.1071/IS22048","url":null,"abstract":"Abstract. Freshwater mussels are essential for the integrity of freshwater ecosystems but numbers of these organisms are declining rapidly at regional and global scales. The phylogenetic and biogeographic aspects of the rich unionoid fauna of the Indo-Burma region are becoming increasingly well understood. Guangxi is part of the Chinese portion of the Indo-Burma biodiversity hotspot but regional studies of the freshwater mussel diversity are scarce. In this study, we report a new genus and species of freshwater mussel from Guangxi, China. Genetic datasets including three genes (COI, 16S rRNA and 28S rRNA) and complete maternal mitogenomes were compiled to infer the phylogenetic history of the group. Molecular phylogenetic analyses showed that the new species formed a monophyletic group and was closely related to Obovalis and Ptychorhynchus in the tribe Gonideini of the subfamily Gonideinae. Morphological and molecular evidence supported that these specimens represent an undescribed genus and species that we describe as Postolata guangxiensis gen. nov., sp. nov. The discovery of this new taxon adds to the known level of endemism of freshwater mussels in Guangxi and a detailed survey of uncharted areas should reveal new diversity in the future. We also suggest that complete mitogenomes or even genome-scale nuclear data should be used for phylogenetic reconstructions when proposing major taxonomic changes. ZooBank: urn:lsid:zoobank.org:pub:76FC5A1D-7507-4F26-A12C-EC08AB333274","PeriodicalId":54927,"journal":{"name":"Invertebrate Systematics","volume":"37 1","pages":"152 - 166"},"PeriodicalIF":2.2,"publicationDate":"2023-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48039148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
B. Huber, Guanliang Meng, N. Dupérré, M. Herrera, Diego J. Inclán, B. Wipfler
Abstract. Males of the South American spider genus Mecolaesthus Simon, 1893 are characterised by a dorsally ‘inflated’ prosoma or hump. Here we describe the first representatives of the genus from Ecuador. A phylogenetic analysis of molecular sequence data suggests that the new species are part of an Amazonian-West Indian clade. Whether this clade is sister to ‘true’ (northern Venezuelan) Mecolaesthus or not remains unclear. The two clades occupy different major Neotropical biogeographic regions. Our phylogenetic reanalysis of Mecolaesthus and related genera greatly expands the taxon sampling compared to previous analyses (from 9 to 46 species representing the ‘Venezuelan clade’ of genera) but remains ambiguous regarding the monophyly of Mecolaesthus. In addition, we present first micro-computed tomography (µ-CT) data of the unique prosoma ‘inflation’, showing that these ‘inflations’ are tightly packed with muscles inserted at the leg coxae, mainly of legs 2 and 3. Male (but not female) leg length is negatively correlated with body size and this is highly unusual in Pholcidae. We predict that male–male fights in Mecolaesthus rely on powerful leg movements of legs 2 and 3 rather than on using legs 1 to assess the opponent’s body size. Finally, we document structural genital asymmetry in females of three of the four new species and in M. putumayo Huber, 2000 (of which the female is newly described). This constitutes the fourth known case of structural genital asymmetry in Pholcidae. ZooBank: urn:lsid:zoobank.org:pub:3110BCD6-BA65-45E2-A758-71F2767BD6E4
{"title":"Humpback spiders from Ecuador: relationships, prosoma ‘inflation’ and genital asymmetry (Araneae: Pholcidae: Mecolaesthus)","authors":"B. Huber, Guanliang Meng, N. Dupérré, M. Herrera, Diego J. Inclán, B. Wipfler","doi":"10.1071/IS22052","DOIUrl":"https://doi.org/10.1071/IS22052","url":null,"abstract":"Abstract. Males of the South American spider genus Mecolaesthus Simon, 1893 are characterised by a dorsally ‘inflated’ prosoma or hump. Here we describe the first representatives of the genus from Ecuador. A phylogenetic analysis of molecular sequence data suggests that the new species are part of an Amazonian-West Indian clade. Whether this clade is sister to ‘true’ (northern Venezuelan) Mecolaesthus or not remains unclear. The two clades occupy different major Neotropical biogeographic regions. Our phylogenetic reanalysis of Mecolaesthus and related genera greatly expands the taxon sampling compared to previous analyses (from 9 to 46 species representing the ‘Venezuelan clade’ of genera) but remains ambiguous regarding the monophyly of Mecolaesthus. In addition, we present first micro-computed tomography (µ-CT) data of the unique prosoma ‘inflation’, showing that these ‘inflations’ are tightly packed with muscles inserted at the leg coxae, mainly of legs 2 and 3. Male (but not female) leg length is negatively correlated with body size and this is highly unusual in Pholcidae. We predict that male–male fights in Mecolaesthus rely on powerful leg movements of legs 2 and 3 rather than on using legs 1 to assess the opponent’s body size. Finally, we document structural genital asymmetry in females of three of the four new species and in M. putumayo Huber, 2000 (of which the female is newly described). This constitutes the fourth known case of structural genital asymmetry in Pholcidae. ZooBank: urn:lsid:zoobank.org:pub:3110BCD6-BA65-45E2-A758-71F2767BD6E4","PeriodicalId":54927,"journal":{"name":"Invertebrate Systematics","volume":"37 1","pages":"117 - 151"},"PeriodicalIF":2.2,"publicationDate":"2023-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45803870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Riccieri, Emilia Capogna, J. D. Pinto, M. Bologna
Abstract. Nemognathinae is the most widespread subfamily of Meloidae, with ~600 species, and includes the only blister beetles distributed in Australia and on islands of the western Pacific. Four tribes are recognised based on morphology: Stenoderini, Palaestrini, Horiini and Nemognathini. Using two mitochondrial (16S, COI) and three nuclear markers (CAD, 28S, ITS2), and both maximum likelihood and Bayesian approaches, this study describes the evolutionary history of Nemognathinae based on molecular data for the first time. We provided a fossil-calibrated phylogeny that unravels the phylogenetic relationships among the tribes and among most of the genera, and a reconstruction of the biogeographic history using a parametric approach. Our results recognised the four tribes that were described previously based on morphology and revealed the presence of another well-differentiated clade corresponding to the genus Zoltanzonitis. Phylogenetic relationships among the tribes are well supported, with Stenoderini as the most ancient lineage, followed by Zoltanzonitini, Palaestrini, Horiini and Nemognathini. A few long-standing genera within Nemognathini (Nemognatha, Zonitis, Stenoria) and the nominate subgenus Stenodera (Stenodera) were recovered as polyphyletic. In addition, biogeographic analyses revealed the origin of the subfamily in the Old World during the Eocene, and the associated diversification into the five tribes astride the Eocene and Oligocene between 46 and 30 Ma. Based on these results we propose the new tribe Zoltanzonitini, and the elevation of the subgenus Pronemognatha to genus level, new status. In addition, Zonitoschema breveapicalis new comb., Z. curticeps new comb. and Z. pulchella new status are proposed. ZooBank: urn:lsid:zoobank.org:pub:72EECC6D-36A6-4DD7-B4DB-D0692034E775.
{"title":"Molecular phylogeny, systematics and biogeography of the subfamily Nemognathinae (Coleoptera, Meloidae)","authors":"A. Riccieri, Emilia Capogna, J. D. Pinto, M. Bologna","doi":"10.1071/IS22056","DOIUrl":"https://doi.org/10.1071/IS22056","url":null,"abstract":"Abstract. Nemognathinae is the most widespread subfamily of Meloidae, with ~600 species, and includes the only blister beetles distributed in Australia and on islands of the western Pacific. Four tribes are recognised based on morphology: Stenoderini, Palaestrini, Horiini and Nemognathini. Using two mitochondrial (16S, COI) and three nuclear markers (CAD, 28S, ITS2), and both maximum likelihood and Bayesian approaches, this study describes the evolutionary history of Nemognathinae based on molecular data for the first time. We provided a fossil-calibrated phylogeny that unravels the phylogenetic relationships among the tribes and among most of the genera, and a reconstruction of the biogeographic history using a parametric approach. Our results recognised the four tribes that were described previously based on morphology and revealed the presence of another well-differentiated clade corresponding to the genus Zoltanzonitis. Phylogenetic relationships among the tribes are well supported, with Stenoderini as the most ancient lineage, followed by Zoltanzonitini, Palaestrini, Horiini and Nemognathini. A few long-standing genera within Nemognathini (Nemognatha, Zonitis, Stenoria) and the nominate subgenus Stenodera (Stenodera) were recovered as polyphyletic. In addition, biogeographic analyses revealed the origin of the subfamily in the Old World during the Eocene, and the associated diversification into the five tribes astride the Eocene and Oligocene between 46 and 30 Ma. Based on these results we propose the new tribe Zoltanzonitini, and the elevation of the subgenus Pronemognatha to genus level, new status. In addition, Zonitoschema breveapicalis new comb., Z. curticeps new comb. and Z. pulchella new status are proposed. ZooBank: urn:lsid:zoobank.org:pub:72EECC6D-36A6-4DD7-B4DB-D0692034E775.","PeriodicalId":54927,"journal":{"name":"Invertebrate Systematics","volume":"37 1","pages":"101 - 116"},"PeriodicalIF":2.2,"publicationDate":"2023-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43240931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Xuan-Kong Jiang, W. Shear, Li-ping Ye, Hui-Ming Chen, Z. Xie
ABSTRACT The millipede subfamily Pericambalinae Silvestri, 1909 is poorly understood and the taxonomic status remains controversial. Pericambalinae was regarded as either a subfamily of Cambalopsidae or an independent family. To address this issue, we conducted a molecular phylogenetic analysis and a morphological revision, and the genera and species from China are also revised. The results support the recovery of the family status, Pericambalidae, stat. nov. The morphological differences between Bilingulus Zhang & Li, 1981 and Parabilingulus Zhang & Li, 1981 are shown to be caused by post-embryonic development (anamorphosis and non-systemic metamorphosis) and both of these should be junior synonyms of Pericambala Silvestri, 1909 (Pericambala = Bilingulus, syn. nov. = Parabilingulus, syn. nov.). Three new combinations are proposed: Pericambala simplicia (Mauriès & Nguyen Duy-Jacquemin, 1997), comb. nov., Pericambala aramula (Zhang & Li, 1981), comb. nov. and Pericambala sinica (Zhang & Li, 1981), comb. nov. The mature specimens of Pericambala simplicia, comb. nov. and Pericambala aramula, comb. nov. were collected from the type localities and are described for the first time. A new species, Pericambala cordata, sp. nov. is described. After revision, Pericambalidae contains two genera and six species with one genus and four species recorded from China. Due to a deficiency in outgroup sampling, the phylogenetic status of Pericambalidae in the suborder Cambalidea remains uncertain. Variation of the gnathochilarium in Cambalidea is discussed and a key to the species of Pericambala in China is also provided. This research lays a foundation for further revision of Cambalidea in the future. ZooBank: urn:lsid:zoobank.org:pub:BDA46BCE-102B-45FE-A963-47F029A09E76.
{"title":"Recovery of the family status of Pericambalidae Silvestri, 1909, stat. nov. (Diplopoda: Spirostreptida: Cambalidea), with a revision of the genera and species from China","authors":"Xuan-Kong Jiang, W. Shear, Li-ping Ye, Hui-Ming Chen, Z. Xie","doi":"10.1071/IS22044","DOIUrl":"https://doi.org/10.1071/IS22044","url":null,"abstract":"ABSTRACT The millipede subfamily Pericambalinae Silvestri, 1909 is poorly understood and the taxonomic status remains controversial. Pericambalinae was regarded as either a subfamily of Cambalopsidae or an independent family. To address this issue, we conducted a molecular phylogenetic analysis and a morphological revision, and the genera and species from China are also revised. The results support the recovery of the family status, Pericambalidae, stat. nov. The morphological differences between Bilingulus Zhang & Li, 1981 and Parabilingulus Zhang & Li, 1981 are shown to be caused by post-embryonic development (anamorphosis and non-systemic metamorphosis) and both of these should be junior synonyms of Pericambala Silvestri, 1909 (Pericambala = Bilingulus, syn. nov. = Parabilingulus, syn. nov.). Three new combinations are proposed: Pericambala simplicia (Mauriès & Nguyen Duy-Jacquemin, 1997), comb. nov., Pericambala aramula (Zhang & Li, 1981), comb. nov. and Pericambala sinica (Zhang & Li, 1981), comb. nov. The mature specimens of Pericambala simplicia, comb. nov. and Pericambala aramula, comb. nov. were collected from the type localities and are described for the first time. A new species, Pericambala cordata, sp. nov. is described. After revision, Pericambalidae contains two genera and six species with one genus and four species recorded from China. Due to a deficiency in outgroup sampling, the phylogenetic status of Pericambalidae in the suborder Cambalidea remains uncertain. Variation of the gnathochilarium in Cambalidea is discussed and a key to the species of Pericambala in China is also provided. This research lays a foundation for further revision of Cambalidea in the future. ZooBank: urn:lsid:zoobank.org:pub:BDA46BCE-102B-45FE-A963-47F029A09E76.","PeriodicalId":54927,"journal":{"name":"Invertebrate Systematics","volume":"37 1","pages":"78 - 100"},"PeriodicalIF":2.2,"publicationDate":"2023-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47085421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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