Pub Date : 2024-01-19DOI: 10.1163/18759866-bja10053
K. Takasuka, Gavin R. Broad
The parasitoid way of life (parasitizing and finally killing a single arthropod host) is one of the most successful lifeways in the animal kingdom, sparking an explosive diversification and accompanying numerous parasitoid strategies in insects, especially in the order Hymenoptera. Amongst parasitoid wasps, the Polysphincta group of genera has evolved a highly distinctive parasitoid mode of life, as solitary koinobiont ectoparasitoids of spiders (Chelicerata: Araneae). Some species of polysphinctine wasps have a remarkable ability to control spiders’ web-building behaviour (host web manipulation) to protect the vulnerable wasp cocoons. The group currently consists of 25 genera and 294 extant species worldwide, with 14 genera known to manipulate their host spiders. This study reviews the current species composition, distribution, host utilization and biology of all genera belonging to the Polysphincta group and their ancestral genera of spider egg mass pseudo-parasitoids, highlighting specific offensive approaches for subjugating spider hosts for oviposition and web manipulation against specific spider hosts. There must still be many more unique behaviours to be discovered, given that the life histories of several polysphinctine genera are poorly known or unknown. A tidy correspondence between lineages of polysphinctines and host spiders was recognized, implying the evolutionary history of polysphinctines. Based on the integrated information on behavioural data and host utilization, we suggest some hypotheses determining triggers for host shifts and discuss the possibility of adaptive radiation driven by divergent natural selection on host differentiation. One new taxonomic change is proposed: Zaglyptus idukkiensis (Manjusha, Sudheer & Ghosh, 2019), comb. nov., is transferred from Polysphincta.
{"title":"A bionomic overview of spider parasitoids and pseudo-parasitoids of the ichneumonid wasp subfamily Pimplinae","authors":"K. Takasuka, Gavin R. Broad","doi":"10.1163/18759866-bja10053","DOIUrl":"https://doi.org/10.1163/18759866-bja10053","url":null,"abstract":"\u0000The parasitoid way of life (parasitizing and finally killing a single arthropod host) is one of the most successful lifeways in the animal kingdom, sparking an explosive diversification and accompanying numerous parasitoid strategies in insects, especially in the order Hymenoptera. Amongst parasitoid wasps, the Polysphincta group of genera has evolved a highly distinctive parasitoid mode of life, as solitary koinobiont ectoparasitoids of spiders (Chelicerata: Araneae). Some species of polysphinctine wasps have a remarkable ability to control spiders’ web-building behaviour (host web manipulation) to protect the vulnerable wasp cocoons. The group currently consists of 25 genera and 294 extant species worldwide, with 14 genera known to manipulate their host spiders. This study reviews the current species composition, distribution, host utilization and biology of all genera belonging to the Polysphincta group and their ancestral genera of spider egg mass pseudo-parasitoids, highlighting specific offensive approaches for subjugating spider hosts for oviposition and web manipulation against specific spider hosts. There must still be many more unique behaviours to be discovered, given that the life histories of several polysphinctine genera are poorly known or unknown. A tidy correspondence between lineages of polysphinctines and host spiders was recognized, implying the evolutionary history of polysphinctines. Based on the integrated information on behavioural data and host utilization, we suggest some hypotheses determining triggers for host shifts and discuss the possibility of adaptive radiation driven by divergent natural selection on host differentiation. One new taxonomic change is proposed: Zaglyptus idukkiensis (Manjusha, Sudheer & Ghosh, 2019), comb. nov., is transferred from Polysphincta.","PeriodicalId":55210,"journal":{"name":"Contributions to Zoology","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139612327","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}
Pub Date : 2023-11-20DOI: 10.1163/18759866-bja10055
J. Arntzen
Morphological and genetic variation of organisms is generally lower in northern than in southern regions of the Palearctic. This ubiquitous geographical pattern has been associated with extinction and recolonization processes in the north versus persistence in the Mediterranean area, as governed by climate change in the Pleistocene. One area of differentiation and complexity is the Iberian Peninsula where two distinct sister-species of marbled newts possess adjoining and geographically sharply delimited ranges over the north (Triturus marmoratus) and the south of the peninsula (T. pygmaeus). Within the latter species two forms are here documented, with different colouration patterns and non-overlapping ranges. The southern form is striped, much as in T. marmoratus, and occurs to the south of the Guadalquivir River. The northern form, here described as a new subspecies, has a reticulated dorsal colouration. It occurs only north of the Guadalquivir and is thus sandwiched in between two striped marbled newt taxa. Both T. pygmaeus subspecies engage inside the Doñana National Park in a ca. 2,500 m narrow contact zone. Although an inferred substantial selection against hybrids goes a long way to support species status, a reanalysis of published genetic data is required to solve this issue, along with the wider investigation of the same type of (microsatelite) data for the southern, nominotypical subspecies.
古北区北部生物的形态和遗传变异普遍低于南部地区。这种无处不在的地理模式与北方的灭绝和重新定居过程有关，而地中海地区的持续存在则受更新世气候变化的影响。伊比利亚半岛是一个分化和复杂的地区，那里有两个不同的大理石纹蝾螈姊妹种，它们在半岛北部（Triturus marmoratus）和南部（T. pygmaeus）的分布范围相邻，地理上界限分明。后者有两种形态，具有不同的色彩模式，分布范围也不重叠。南部的蟒蛇有条纹，与 T. marmoratus 相似，分布在瓜达尔基维尔河以南。北部形态在此被描述为一个新的亚种，背部呈网状。它只出现在瓜达尔基维尔河以北，因此被夹在两个条纹蝾螈类群之间。两个 T. pygmaeus 亚种都在多纳纳国家公园内约 2500 米的狭窄接触区内活动。尽管对杂交种的大量选择推断在很大程度上支持了物种地位，但要解决这个问题，还需要对已发表的遗传数据进行重新分析，同时对南部的提名亚种的同类（微卫星）数据进行更广泛的调查。
{"title":"Morphological and genetic diversification of Old-World marbled newts, with the description of a new and ‘not-at-all-cryptic’ subspecies from the Iberian Peninsula (Triturus, Salamandridae)","authors":"J. Arntzen","doi":"10.1163/18759866-bja10055","DOIUrl":"https://doi.org/10.1163/18759866-bja10055","url":null,"abstract":"Morphological and genetic variation of organisms is generally lower in northern than in southern regions of the Palearctic. This ubiquitous geographical pattern has been associated with extinction and recolonization processes in the north versus persistence in the Mediterranean area, as governed by climate change in the Pleistocene. One area of differentiation and complexity is the Iberian Peninsula where two distinct sister-species of marbled newts possess adjoining and geographically sharply delimited ranges over the north (Triturus marmoratus) and the south of the peninsula (T. pygmaeus). Within the latter species two forms are here documented, with different colouration patterns and non-overlapping ranges. The southern form is striped, much as in T. marmoratus, and occurs to the south of the Guadalquivir River. The northern form, here described as a new subspecies, has a reticulated dorsal colouration. It occurs only north of the Guadalquivir and is thus sandwiched in between two striped marbled newt taxa. Both T. pygmaeus subspecies engage inside the Doñana National Park in a ca. 2,500 m narrow contact zone. Although an inferred substantial selection against hybrids goes a long way to support species status, a reanalysis of published genetic data is required to solve this issue, along with the wider investigation of the same type of (microsatelite) data for the southern, nominotypical subspecies.","PeriodicalId":55210,"journal":{"name":"Contributions to Zoology","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139258304","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}
Pub Date : 2023-11-13DOI: 10.1163/18759866-bja10054
Mohammad Javad Malek-Hosseini, Traian Brad, Yaser Fatemi, Matjaž Kuntner, Cene Fišer
Abstract Cave systems fed with hydrogen sulfide-rich groundwater are unique chemoautotrophy-dependent ecosystems. Although globally widespread and known to harbor unique subterranean metazoan communities, they have mostly been studied in Europe and North America, less so in Asia. Here, we report on a discovery of a new species of amphipod crustacean from sulfidic waters of Tashan-Chah Kabootari aquifer from Zagros Mountains in Iran. The new species corresponds morphologically to the melitid genus Tegano Barnard & Karaman, 1982, and Tegano tashanensis sp. nov. is the first amphipod from the superfamily Hadzioidea found exclusively in sulfidic water. Phylogenies derived from the mitochondrial coi and the nuclear 28S rRNA sequences recover T. tashanensis sp. nov. in a clade that contains representatives of the currently para- or polyphyletic genera Barnardomelita, Brachina, Josephosella , and Tegano indicating the need for a revised melitid genus level systematics. This clade comprises marine, freshwater and subterranean species globally distributed in regions that were connected by the ancient Tethys Sea. As such, these taxa may be suitable biogeographic models for studying past dispersal, vicariance and multiple colonization of inland groundwaters.
{"title":"A new cave-dwelling hadzioid amphipod (Senticaudata, Hadzioidea, Melitidae) from sulfidic groundwaters in Iran","authors":"Mohammad Javad Malek-Hosseini, Traian Brad, Yaser Fatemi, Matjaž Kuntner, Cene Fišer","doi":"10.1163/18759866-bja10054","DOIUrl":"https://doi.org/10.1163/18759866-bja10054","url":null,"abstract":"Abstract Cave systems fed with hydrogen sulfide-rich groundwater are unique chemoautotrophy-dependent ecosystems. Although globally widespread and known to harbor unique subterranean metazoan communities, they have mostly been studied in Europe and North America, less so in Asia. Here, we report on a discovery of a new species of amphipod crustacean from sulfidic waters of Tashan-Chah Kabootari aquifer from Zagros Mountains in Iran. The new species corresponds morphologically to the melitid genus Tegano Barnard & Karaman, 1982, and Tegano tashanensis sp. nov. is the first amphipod from the superfamily Hadzioidea found exclusively in sulfidic water. Phylogenies derived from the mitochondrial coi and the nuclear 28S rRNA sequences recover T. tashanensis sp. nov. in a clade that contains representatives of the currently para- or polyphyletic genera Barnardomelita, Brachina, Josephosella , and Tegano indicating the need for a revised melitid genus level systematics. This clade comprises marine, freshwater and subterranean species globally distributed in regions that were connected by the ancient Tethys Sea. As such, these taxa may be suitable biogeographic models for studying past dispersal, vicariance and multiple colonization of inland groundwaters.","PeriodicalId":55210,"journal":{"name":"Contributions to Zoology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136352223","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}
Pub Date : 2023-08-14DOI: 10.1163/18759866-bja10052
Diego A. Caraballo
Satellite dna s (satDNA) have long been recognized as a major driving force in karyotypic repatterning, owing to their ability to recombine between non-homologous chromosomes. A quite extensively studied model is the Repetitive PvuII Ctenomys Sequence (rpcs), the main component of constitutive heterochromatin in rodents of the genus Ctenomys (Rodentia, Ctenomyidae). At the genus level, fluctuations in rpcs copy number have been previously associated with karyotypic instability. However, when a microevolutionary approach was assayed in the most karyotypically variable lineage of the genus, the vast population-level copy number variation precluded any possibility of analyzing it in a phylogenetic framework. The existence of sex-related differences as a source of variability was not considered until later, when chromosomal banding suggested that the Y chromosome may be a significant reservoir of rpcs. This study aimed to investigate the bias associated with the presence of the Y chromosome in rpcs copy number variation in the Corrientes group of Ctenomys. The results revealed that the Y chromosome harbors almost twice the amount of rpcs compared to the rest of the chromosome complement, explaining the high levels of intrapopulation variation. The evolution of rpcs copy number in males and females showed independent patterns, attributable to the presence/absence of the Y chromosome. The correlation between rpcs dynamics and diploid number fluctuations was also investigated, concluding that some karyotypic repatterning events could be explained by satDNA amplification/deletion, but not all of them. This study highlights the importance of considering differences resulting from the differential accumulation of satDNA in the heterogametic chromosome.
{"title":"Reassessing the causal connection between satDNA dynamics and chromosomal evolution in Ctenomys (Rodentia, Ctenomyidae): Unveiling the overlooked importance of the Y chromosome","authors":"Diego A. Caraballo","doi":"10.1163/18759866-bja10052","DOIUrl":"https://doi.org/10.1163/18759866-bja10052","url":null,"abstract":"\u0000Satellite dna s (satDNA) have long been recognized as a major driving force in karyotypic repatterning, owing to their ability to recombine between non-homologous chromosomes. A quite extensively studied model is the Repetitive PvuII Ctenomys Sequence (rpcs), the main component of constitutive heterochromatin in rodents of the genus Ctenomys (Rodentia, Ctenomyidae). At the genus level, fluctuations in rpcs copy number have been previously associated with karyotypic instability. However, when a microevolutionary approach was assayed in the most karyotypically variable lineage of the genus, the vast population-level copy number variation precluded any possibility of analyzing it in a phylogenetic framework. The existence of sex-related differences as a source of variability was not considered until later, when chromosomal banding suggested that the Y chromosome may be a significant reservoir of rpcs. This study aimed to investigate the bias associated with the presence of the Y chromosome in rpcs copy number variation in the Corrientes group of Ctenomys. The results revealed that the Y chromosome harbors almost twice the amount of rpcs compared to the rest of the chromosome complement, explaining the high levels of intrapopulation variation. The evolution of rpcs copy number in males and females showed independent patterns, attributable to the presence/absence of the Y chromosome. The correlation between rpcs dynamics and diploid number fluctuations was also investigated, concluding that some karyotypic repatterning events could be explained by satDNA amplification/deletion, but not all of them. This study highlights the importance of considering differences resulting from the differential accumulation of satDNA in the heterogametic chromosome.","PeriodicalId":55210,"journal":{"name":"Contributions to Zoology","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45176326","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}
Pub Date : 2023-08-14DOI: 10.1163/18759866-bja10051
V. Jojić, Aleksandar Bajić, N. Barišić Klisarić, Vanja Bugarski-Stanojević, A. Snoj, B. Miljanović, O. Askeyev, Igor Askeyev, S. Marić
This is a preliminary and exploratory study of cranial variation in European populations of grayling. We investigated the correspondence between size/shape variation of the dorsal (dc), ventral (vc) and occipital (oc) cranium and phylogenetic relationships (inferred from mitochondrial control region – mtDNA cr and microsatellite dna data) of six grayling populations: three from Balkan phylogenetic clade and two from Caspian phylogenetic clade of the European grayling Thymallus thymallus and one population of the Adriatic grayling Thymallus aeliani, which until recently was considered the Adriatic phylogenetic clade of T. thymallus. Significant size and shape differences were found between populations in all three cranial views. However, significant size-related shape variation (allometry) was found for dc and vc, but not for oc. The size variation of each cranial view does not contain phylogenetic signal, but size variation of oc is consistent with genetic variation inferred from microsatellite dna. Regarding shape variation, a significant phylogenetic signal was detected only for oc, and only the shape variation of oc is consistent with the genetic variation inferred from the mtDNA cr. Moreover, the Adriatic grayling T. aeliani (Soča population) was clearly separated from the three T. thymallus populations of the Balkan phylogenetic clade and the two T. thymallus populations of the Caspian phylogenetic clade only at the level of oc. Thus, our results suggest that different cranial regions differ in allometry, reflect phylo(genetic) relationships differently, and exhibit differences in ecophenotypic plasticity, with oc seeming best suited to represent the phylogenetic relationships of the grayling populations studied.
{"title":"Exploring the phylogenetic signal in the cranial variation of European populations of grayling (Actinopterygii, Salmonidae)","authors":"V. Jojić, Aleksandar Bajić, N. Barišić Klisarić, Vanja Bugarski-Stanojević, A. Snoj, B. Miljanović, O. Askeyev, Igor Askeyev, S. Marić","doi":"10.1163/18759866-bja10051","DOIUrl":"https://doi.org/10.1163/18759866-bja10051","url":null,"abstract":"\u0000This is a preliminary and exploratory study of cranial variation in European populations of grayling. We investigated the correspondence between size/shape variation of the dorsal (dc), ventral (vc) and occipital (oc) cranium and phylogenetic relationships (inferred from mitochondrial control region – mtDNA cr and microsatellite dna data) of six grayling populations: three from Balkan phylogenetic clade and two from Caspian phylogenetic clade of the European grayling Thymallus thymallus and one population of the Adriatic grayling Thymallus aeliani, which until recently was considered the Adriatic phylogenetic clade of T. thymallus. Significant size and shape differences were found between populations in all three cranial views. However, significant size-related shape variation (allometry) was found for dc and vc, but not for oc. The size variation of each cranial view does not contain phylogenetic signal, but size variation of oc is consistent with genetic variation inferred from microsatellite dna. Regarding shape variation, a significant phylogenetic signal was detected only for oc, and only the shape variation of oc is consistent with the genetic variation inferred from the mtDNA cr. Moreover, the Adriatic grayling T. aeliani (Soča population) was clearly separated from the three T. thymallus populations of the Balkan phylogenetic clade and the two T. thymallus populations of the Caspian phylogenetic clade only at the level of oc. Thus, our results suggest that different cranial regions differ in allometry, reflect phylo(genetic) relationships differently, and exhibit differences in ecophenotypic plasticity, with oc seeming best suited to represent the phylogenetic relationships of the grayling populations studied.","PeriodicalId":55210,"journal":{"name":"Contributions to Zoology","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44347342","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}
Pub Date : 2023-06-20DOI: 10.1163/18759866-bja10050
R. Mehrotra, S. Chavanich, C. Monchanin, S. Jualaong, B. Hoeksema
Dendrophylliidae represents one of the most speciose families of scleractinian coral, expressing a wide range of morphological and ecological traits. Recent phylogenetic analyses of the family have indicated that several conventional genera are in need of revision. In the Gulf of Thailand, dendrophylliids are predominantly found on hard-substrate reefs and pinnacles, or on soft-substrate habitats. Soft-substrate habitats in the Gulf of Thailand have been shown to host unique species assemblages and faunal ecology. Here we provided an updated phylogenetic hypothesis for the Dendrophylliidae based on newly sequenced species, and analyses integrating morphology, genetics and ecology. High-resolution Micro-ct was used to create digital versions of the studied species, allowing for non-destructive examination of internal and external features. Our findings allowed for a taxonomic assessment of the genera Heteropsammia and Tubastraea, with the species Balanophyllia (Eupsammia) stimpsonii, moved to the genus Tubastraea. They also support the polyphyly of Dendrophyllia and Cladopsammia. In-situ surveys provided population-density information for four dendrophylliid species from soft substrate habitats, indicating that the species Heteropsammia moretonensis may be the most widespread within the Gulf of Thailand. These surveys also provided novel ecological documentation associated with these corals, including protocooperative feeding upon a sea pen by Tubastraea stimpsonii comb. nov., and feeding upon other cnidarians by Heteropsammia spp.
{"title":"Biodiversity, ecology, and taxonomy of sediment-dwelling Dendrophylliidae (Anthozoa, Scleractinia) in the Gulf of Thailand","authors":"R. Mehrotra, S. Chavanich, C. Monchanin, S. Jualaong, B. Hoeksema","doi":"10.1163/18759866-bja10050","DOIUrl":"https://doi.org/10.1163/18759866-bja10050","url":null,"abstract":"\u0000Dendrophylliidae represents one of the most speciose families of scleractinian coral, expressing a wide range of morphological and ecological traits. Recent phylogenetic analyses of the family have indicated that several conventional genera are in need of revision. In the Gulf of Thailand, dendrophylliids are predominantly found on hard-substrate reefs and pinnacles, or on soft-substrate habitats. Soft-substrate habitats in the Gulf of Thailand have been shown to host unique species assemblages and faunal ecology. Here we provided an updated phylogenetic hypothesis for the Dendrophylliidae based on newly sequenced species, and analyses integrating morphology, genetics and ecology. High-resolution Micro-ct was used to create digital versions of the studied species, allowing for non-destructive examination of internal and external features. Our findings allowed for a taxonomic assessment of the genera Heteropsammia and Tubastraea, with the species Balanophyllia (Eupsammia) stimpsonii, moved to the genus Tubastraea. They also support the polyphyly of Dendrophyllia and Cladopsammia. In-situ surveys provided population-density information for four dendrophylliid species from soft substrate habitats, indicating that the species Heteropsammia moretonensis may be the most widespread within the Gulf of Thailand. These surveys also provided novel ecological documentation associated with these corals, including protocooperative feeding upon a sea pen by Tubastraea stimpsonii comb. nov., and feeding upon other cnidarians by Heteropsammia spp.","PeriodicalId":55210,"journal":{"name":"Contributions to Zoology","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41705438","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}
Pub Date : 2023-06-16DOI: 10.1163/18759866-bja10049
Mohammad Sadegh Alavi-Yeganeh, J. Ghasemzadeh, Sanaz Kouhi, J. Durand
The teleost family Mugilidae is speciose with uniform morpho-anatomical characteristics, which render species identification difficult. The dna barcoding technique has, however, proven to be a precise and reliable approach for species delineation. To date, dna barcoding flags numerous polyphyletic species in Mugilidae that probably correspond to species complexes and that call for further taxonomical investigation. Among these species, the squaretail mullet Ellochelon vaigiensis is an interesting case study because, unlike other mullet species, it is easily identified from its unique phenotype. Recent studies of genetic diversity in this monotypic species have revealed two lineages, located either in the Indo-Pacific (Polynesia and Taiwan waters) or along Australian shores. In this study, a third lineage is described in the North of the Indian Ocean, based on nucleotide polymorphisms of Cytochrome c oxidase 1 and barcodes available in bold and Cytochrome b. Despite genetic divergences that exceed the intraspecific threshold, there was no morpho-anatomical difference among specimens of the north Indian Ocean vs. Indo-Pacific or Australia. These molecular results suggest nominal species of Ellochelon vaigiensis within a cryptic species complex.
{"title":"The squaretail mullet Ellochelon vaigiensis (Quoy & Gaimard, 1825) a complex of cryptic species?","authors":"Mohammad Sadegh Alavi-Yeganeh, J. Ghasemzadeh, Sanaz Kouhi, J. Durand","doi":"10.1163/18759866-bja10049","DOIUrl":"https://doi.org/10.1163/18759866-bja10049","url":null,"abstract":"\u0000The teleost family Mugilidae is speciose with uniform morpho-anatomical characteristics, which render species identification difficult. The dna barcoding technique has, however, proven to be a precise and reliable approach for species delineation. To date, dna barcoding flags numerous polyphyletic species in Mugilidae that probably correspond to species complexes and that call for further taxonomical investigation. Among these species, the squaretail mullet Ellochelon vaigiensis is an interesting case study because, unlike other mullet species, it is easily identified from its unique phenotype. Recent studies of genetic diversity in this monotypic species have revealed two lineages, located either in the Indo-Pacific (Polynesia and Taiwan waters) or along Australian shores. In this study, a third lineage is described in the North of the Indian Ocean, based on nucleotide polymorphisms of Cytochrome c oxidase 1 and barcodes available in bold and Cytochrome b. Despite genetic divergences that exceed the intraspecific threshold, there was no morpho-anatomical difference among specimens of the north Indian Ocean vs. Indo-Pacific or Australia. These molecular results suggest nominal species of Ellochelon vaigiensis within a cryptic species complex.","PeriodicalId":55210,"journal":{"name":"Contributions to Zoology","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41264697","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}
Pub Date : 2023-06-16DOI: 10.1163/18759866-bja10048
Tatiana Fioravanti, Nicola Maio, Peter Nick Psomadakis, Sandra Manzotti, Antonio Pompilio Gigante, Andrea Splendiani, Massimiliano Bottaro, Vincenzo Caputo Barucchi
Abstract Although historically widespread in most of the shallow and warm waters of the world, the presence of sawfishes in the Mediterranean Sea is still a debated question. For some authors, they never inhabited this basin except as vagrants, while for other authors both Pristis pristis and Pristis pectinata were present in the Mediterranean Sea but were extirpated in the 1960s–1970s. The sawfish rostrum kept in the Basilica Santuario del Carmine Maggiore (Naples, Italy), and considered by some authors the first record of sawfish in the Mediterranean was studied using a combination of morphological, genetic, radiocarbon dating and histochemical staining methods to validate the taxonomic identification, estimate its age and assess its geographical origin. Results indicate that the rostrum does not belong to P. pristis as reported by previous authors, but instead possesses morphological and genetic characters typical of P. pectinata . In addition, the radiocarbon age shows that the rostrum is more recent than previously believed, dating it back to the mid-nineteenth century, and genetic and meristic results cast doubt on its presumed Mediterranean origin. This study demonstrates that historical records should always be critically evaluated before using them to draw any far-reaching conclusion about species’ past ecology and/or biogeography, and that future studies using historical information and specimens should adopt an integrative taxonomy approach similar to the one used here.
尽管锯鳐在历史上广泛分布于世界上大多数浅水和温暖水域，但锯鳐在地中海的存在仍然是一个有争议的问题。对一些作者来说，它们从来没有在这个盆地生活过，除了作为流浪动物，而对其他作者来说，Pristis Pristis和Pristis pectinata都存在于地中海，但在20世纪60年代至70年代灭绝了。利用形态学、遗传学、放射性碳定年和组织化学染色等综合方法，对意大利那不勒斯圣图里奥教堂(Basilica Santuario del Carmine Maggiore)保存的锯鳐鳃座进行了研究，以验证其分类鉴定、估计其年龄和评估其地理起源。结果表明，该喙部不像以往报道的那样属于P. pristis，而是具有典型的P. pectinata的形态和遗传特征。此外，放射性碳年代测定表明，这个“讲台”的年代比以前认为的要晚，可以追溯到19世纪中期，而基因和分生分析的结果使人们对其假定的地中海起源产生了怀疑。该研究表明，在利用历史记录对物种过去的生态学和/或生物地理学得出任何深远的结论之前，应该始终对其进行批判性评估，并且未来使用历史信息和标本的研究应该采用类似于本文使用的综合分类方法。
{"title":"The sawfish (Rhinopristiformes, Pristidae) rostrum displayed in the “Basilica Santuario del Carmine Maggiore” in Naples, Italy: A long story of legends and taxonomic errors","authors":"Tatiana Fioravanti, Nicola Maio, Peter Nick Psomadakis, Sandra Manzotti, Antonio Pompilio Gigante, Andrea Splendiani, Massimiliano Bottaro, Vincenzo Caputo Barucchi","doi":"10.1163/18759866-bja10048","DOIUrl":"https://doi.org/10.1163/18759866-bja10048","url":null,"abstract":"Abstract Although historically widespread in most of the shallow and warm waters of the world, the presence of sawfishes in the Mediterranean Sea is still a debated question. For some authors, they never inhabited this basin except as vagrants, while for other authors both Pristis pristis and Pristis pectinata were present in the Mediterranean Sea but were extirpated in the 1960s–1970s. The sawfish rostrum kept in the Basilica Santuario del Carmine Maggiore (Naples, Italy), and considered by some authors the first record of sawfish in the Mediterranean was studied using a combination of morphological, genetic, radiocarbon dating and histochemical staining methods to validate the taxonomic identification, estimate its age and assess its geographical origin. Results indicate that the rostrum does not belong to P. pristis as reported by previous authors, but instead possesses morphological and genetic characters typical of P. pectinata . In addition, the radiocarbon age shows that the rostrum is more recent than previously believed, dating it back to the mid-nineteenth century, and genetic and meristic results cast doubt on its presumed Mediterranean origin. This study demonstrates that historical records should always be critically evaluated before using them to draw any far-reaching conclusion about species’ past ecology and/or biogeography, and that future studies using historical information and specimens should adopt an integrative taxonomy approach similar to the one used here.","PeriodicalId":55210,"journal":{"name":"Contributions to Zoology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135622064","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}
Pub Date : 2023-06-06DOI: 10.1163/18759866-bja10045
Ming-Qi Wu, Hai-Long Liu, Meng-Yu Xia, Yu Zhang, R. Sluys, Antai Wang
In this contribution, feeding behaviour assays with the three species Paucumara falcata, Dugesia sp. and Girardia sp. were used to investigate the function of the pharynx during feeding and whether absence of feeding behaviour until full regeneration is a widespread phenomenon among planarians from different taxonomic groups. Our results showed that feeding behaviour of decapitated flatworms was inhibited. Intact worms responded only to pork liver pieces, but isolated pharynges were highly responsive to both pork liver pieces and pork liver extracts. After transverse cutting, the oral part of the isolated pharynx was responsive, while the aboral part showed no response to food items, suggesting that the oral portion of pharynx plays a crucial role during feeding.
{"title":"High degree of independence in the feeding apparatus of planarian flatworms","authors":"Ming-Qi Wu, Hai-Long Liu, Meng-Yu Xia, Yu Zhang, R. Sluys, Antai Wang","doi":"10.1163/18759866-bja10045","DOIUrl":"https://doi.org/10.1163/18759866-bja10045","url":null,"abstract":"\u0000In this contribution, feeding behaviour assays with the three species Paucumara falcata, Dugesia sp. and Girardia sp. were used to investigate the function of the pharynx during feeding and whether absence of feeding behaviour until full regeneration is a widespread phenomenon among planarians from different taxonomic groups. Our results showed that feeding behaviour of decapitated flatworms was inhibited. Intact worms responded only to pork liver pieces, but isolated pharynges were highly responsive to both pork liver pieces and pork liver extracts. After transverse cutting, the oral part of the isolated pharynx was responsive, while the aboral part showed no response to food items, suggesting that the oral portion of pharynx plays a crucial role during feeding.","PeriodicalId":55210,"journal":{"name":"Contributions to Zoology","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49552887","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}
Pub Date : 2023-05-26DOI: 10.1163/18759866-bja10047
Ludi P. Aji, Jeroen Goud, Sean van der Steeg, Ricardo Tapilatu, Diede L. Maas, Leontine E. Becking
Abstract Marine lakes are bodies of seawater that are land-locked and maintain a subterranean connection to the surrounding sea. Here, we document the species diversity of benthic molluscs in 11 marine lakes in Raja Ampat, West Papua, Indonesia, using the roving diving survey method. We specifically tested for relationships between species richness and lake size and the degree of connection to the surrounding sea, and tested potential environmental drivers of community structure. We recorded 73 species, belonging to the classes Gastropoda (48 species, comprising 36 genera and 25 families), Bivalvia (24 species, consisting of 17 genera and 12 families), and Polyplacophora (one species). Molluscs from marine lakes are a subset of species also occurring in coral, seagrass, mangrove, and rocky shore habitats in the open sea. We found lake communities to mostly consist of grazers and filter feeders. The number of mollusc species significantly increased with increasing connection to the surrounding sea, but not with increasing surface area, indicating that dispersal potential may be the main driving force. Furthermore, we observed no significant influence of the environment on the variation in mollusc species composition among marine lakes. Still, we observed certain species to be exclusively present in either high or low-connected lakes, indicating a potential effect of environmental filtering. Marine lakes provide a unique ecosystem for diverse mollusc assemblages and as such should be protected.
{"title":"The diversity of molluscan faunas in marine lakes of Raja Ampat, West Papua, Indonesia","authors":"Ludi P. Aji, Jeroen Goud, Sean van der Steeg, Ricardo Tapilatu, Diede L. Maas, Leontine E. Becking","doi":"10.1163/18759866-bja10047","DOIUrl":"https://doi.org/10.1163/18759866-bja10047","url":null,"abstract":"Abstract Marine lakes are bodies of seawater that are land-locked and maintain a subterranean connection to the surrounding sea. Here, we document the species diversity of benthic molluscs in 11 marine lakes in Raja Ampat, West Papua, Indonesia, using the roving diving survey method. We specifically tested for relationships between species richness and lake size and the degree of connection to the surrounding sea, and tested potential environmental drivers of community structure. We recorded 73 species, belonging to the classes Gastropoda (48 species, comprising 36 genera and 25 families), Bivalvia (24 species, consisting of 17 genera and 12 families), and Polyplacophora (one species). Molluscs from marine lakes are a subset of species also occurring in coral, seagrass, mangrove, and rocky shore habitats in the open sea. We found lake communities to mostly consist of grazers and filter feeders. The number of mollusc species significantly increased with increasing connection to the surrounding sea, but not with increasing surface area, indicating that dispersal potential may be the main driving force. Furthermore, we observed no significant influence of the environment on the variation in mollusc species composition among marine lakes. Still, we observed certain species to be exclusively present in either high or low-connected lakes, indicating a potential effect of environmental filtering. Marine lakes provide a unique ecosystem for diverse mollusc assemblages and as such should be protected.","PeriodicalId":55210,"journal":{"name":"Contributions to Zoology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134922729","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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