Pub Date : 2023-07-20DOI: 10.1080/13235818.2023.2232534
Tristan Joseph Verhoeff
ABSTRACT New deep-sea finned octopods (Octopoda: Cirrata) in the genera Stauroteuthis and Cirrothauma (Cirroteuthidae) are reported from Australian waters. One new species of Stauroteuthis, S. kengrahami n. sp., is reported from southeastern Australia, a second, S. ?gilchristi from off Macquarie Island, and one specimen collected from off Heard Island is provisionally referred to Cirrothauma magna. A single female Luteuthis dentatus (Grimpoteuthididae) is also reported from Macquarie Island, and additional specimens of Grimpoteuthis greeni are reported from the Great Australian Bight. These new records and new species increase the diversity of Australian cirrate octopuses from six to 10 species, covering all recognised cirrate genera excepting Cryptoteuthis, and emphasise how much remains to be learned regarding Australia’s deep-sea cephalopods.
{"title":"A new species of Stauroteuthis (Octopoda: Cirrata) and further novel cirrate octopods from Australian waters","authors":"Tristan Joseph Verhoeff","doi":"10.1080/13235818.2023.2232534","DOIUrl":"https://doi.org/10.1080/13235818.2023.2232534","url":null,"abstract":"ABSTRACT New deep-sea finned octopods (Octopoda: Cirrata) in the genera Stauroteuthis and Cirrothauma (Cirroteuthidae) are reported from Australian waters. One new species of Stauroteuthis, S. kengrahami n. sp., is reported from southeastern Australia, a second, S. ?gilchristi from off Macquarie Island, and one specimen collected from off Heard Island is provisionally referred to Cirrothauma magna. A single female Luteuthis dentatus (Grimpoteuthididae) is also reported from Macquarie Island, and additional specimens of Grimpoteuthis greeni are reported from the Great Australian Bight. These new records and new species increase the diversity of Australian cirrate octopuses from six to 10 species, covering all recognised cirrate genera excepting Cryptoteuthis, and emphasise how much remains to be learned regarding Australia’s deep-sea cephalopods.","PeriodicalId":18857,"journal":{"name":"Molluscan Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42481514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-18DOI: 10.1080/13235818.2023.2232590
Le-Jia Zhang, Xiao-dong Wang
ABSTRACT An extinct freshwater molluscan fauna has been discovered from Quaternary lacustrine deposits of a recently vanished group of lakes and surrounding lacustrine deposits in the Luliang Basin, Yunnan Province, China. Three species of Tchangmargarya He, 2013 are dominant and distributed sympatrically here. One of them is new to science. Here we describe the three Tchangmargarya species from the Luliang Basin, including the new species, Tchangmargarya cuan n. sp., and compare the species composition of this fauna with the other extant lacustrine mollusc fauna of Yunnan. The vanished lakes group in Luliang is the first case of sympatric distribution within Tchangmargarya. It is considered to have once been a diversity hotspot of Tchangmargarya and represents a vanished Quaternary lacustrine habitat in Yunnan.
{"title":"An extinct species of Tchangmargarya (Gastropoda: Viviparidae) from quaternary lacustrine deposits of a group of vanished lakes in Yunnan, China","authors":"Le-Jia Zhang, Xiao-dong Wang","doi":"10.1080/13235818.2023.2232590","DOIUrl":"https://doi.org/10.1080/13235818.2023.2232590","url":null,"abstract":"ABSTRACT An extinct freshwater molluscan fauna has been discovered from Quaternary lacustrine deposits of a recently vanished group of lakes and surrounding lacustrine deposits in the Luliang Basin, Yunnan Province, China. Three species of Tchangmargarya He, 2013 are dominant and distributed sympatrically here. One of them is new to science. Here we describe the three Tchangmargarya species from the Luliang Basin, including the new species, Tchangmargarya cuan n. sp., and compare the species composition of this fauna with the other extant lacustrine mollusc fauna of Yunnan. The vanished lakes group in Luliang is the first case of sympatric distribution within Tchangmargarya. It is considered to have once been a diversity hotspot of Tchangmargarya and represents a vanished Quaternary lacustrine habitat in Yunnan.","PeriodicalId":18857,"journal":{"name":"Molluscan Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44713142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-13DOI: 10.1080/13235818.2023.2233121
İhsan Ekin, R. Şeşen
ABSTRACT This study presents new insights into the near-threatened endemic microsnail Sheitanok amidicus (Schütt & Şeşen, 1991), shedding light on its distribution and morphological characteristics, which have never been documented alive. Surveys conducted in 2023 uncovered two previously unknown localities where the species thrives: stenothermic springs in Tavşantepe village and a private farm in Diyarbakır, Turkey. The snail has whitish-grey body tissue, tentacles with an average length of 0.3 mm, and a foot extending up to 2 mm with grey dots on the upper part. The oval-shaped operculum has an average height and width of 0.4 and 0.3 mm, respectively. The shell width and height is 1.0 mm and 0.7 mm, respectively. The snail has unique features including an orange operculum, heart-shaped blackish mouth parts and two blackish eyes at the base of its tentacles. Previously, the species was known to inhabit seven locations in Southeast Turkey. Its near-threatened status on the IUCN Red List highlights the urgency of conservation efforts. The identification of these new locations provides hope for reducing the risk of extinction for S. amidicus. Additionally, describing the snail's external characteristics would aid in systematic classification of newly found species within this monotypic genus.
{"title":"First live imagery, morphological insights, and new locations of the near-threatened endemic microsnail Sheitanok amidicus (Caenogastropoda: Hydrobiidae) from southeast Turkey","authors":"İhsan Ekin, R. Şeşen","doi":"10.1080/13235818.2023.2233121","DOIUrl":"https://doi.org/10.1080/13235818.2023.2233121","url":null,"abstract":"ABSTRACT\u0000 This study presents new insights into the near-threatened endemic microsnail Sheitanok amidicus (Schütt & Şeşen, 1991), shedding light on its distribution and morphological characteristics, which have never been documented alive. Surveys conducted in 2023 uncovered two previously unknown localities where the species thrives: stenothermic springs in Tavşantepe village and a private farm in Diyarbakır, Turkey. The snail has whitish-grey body tissue, tentacles with an average length of 0.3 mm, and a foot extending up to 2 mm with grey dots on the upper part. The oval-shaped operculum has an average height and width of 0.4 and 0.3 mm, respectively. The shell width and height is 1.0 mm and 0.7 mm, respectively. The snail has unique features including an orange operculum, heart-shaped blackish mouth parts and two blackish eyes at the base of its tentacles. Previously, the species was known to inhabit seven locations in Southeast Turkey. Its near-threatened status on the IUCN Red List highlights the urgency of conservation efforts. The identification of these new locations provides hope for reducing the risk of extinction for S. amidicus. Additionally, describing the snail's external characteristics would aid in systematic classification of newly found species within this monotypic genus.","PeriodicalId":18857,"journal":{"name":"Molluscan Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46883485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-03DOI: 10.1080/13235818.2023.2217531
Sung-Jong Cho, Jeonghee Lee, I. Yang, Jinsoon Park
ABSTRACT This study represents the first molecular analysis of Japeuthria ferrea specimens from Korea, focusing on COI and H3 gene regions for species identification and phylogenetic analysis. A total of 13 samples was collected from three different locations along the south coast of Korea, and their sequences were registered in the NCBI GenBank. The COI and H3 gene regions were successfully amplified and bidirectionally sequenced, providing a valuable reference for future DNA barcoding studies. Phylogenetic analysis based on both COI and H3 sequences demonstrated that the Korean and Japanese J. ferrea populations lacked clear regional differentiation. Despite the limitations in differentiating the regional characteristics of J. ferrea, the study confirms the applicability of COI and H3 genes for accurate species identification. The findings emphasise the importance of employing multiple molecular markers for comprehensive DNA analysis to improve species identification accuracy and to minimise misidentification. Further investigation involving expanded sampling and additional DNA regions is required to elucidate the phylogenetic relationships and distribution of J. ferrea.
{"title":"Molecular identification of Japeuthria ferrea from the south coast of Korea","authors":"Sung-Jong Cho, Jeonghee Lee, I. Yang, Jinsoon Park","doi":"10.1080/13235818.2023.2217531","DOIUrl":"https://doi.org/10.1080/13235818.2023.2217531","url":null,"abstract":"ABSTRACT This study represents the first molecular analysis of Japeuthria ferrea specimens from Korea, focusing on COI and H3 gene regions for species identification and phylogenetic analysis. A total of 13 samples was collected from three different locations along the south coast of Korea, and their sequences were registered in the NCBI GenBank. The COI and H3 gene regions were successfully amplified and bidirectionally sequenced, providing a valuable reference for future DNA barcoding studies. Phylogenetic analysis based on both COI and H3 sequences demonstrated that the Korean and Japanese J. ferrea populations lacked clear regional differentiation. Despite the limitations in differentiating the regional characteristics of J. ferrea, the study confirms the applicability of COI and H3 genes for accurate species identification. The findings emphasise the importance of employing multiple molecular markers for comprehensive DNA analysis to improve species identification accuracy and to minimise misidentification. Further investigation involving expanded sampling and additional DNA regions is required to elucidate the phylogenetic relationships and distribution of J. ferrea.","PeriodicalId":18857,"journal":{"name":"Molluscan Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43330522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-03DOI: 10.1080/13235818.2023.2203075
M. Klunzinger
ABSTRACT Larvae (glochidia) of the freshwater mussel, Westralunio albertisi were obtained from the marsupia of a preserved female at the Western Australian Museum. Glochidial shells of W. albertisi are subtriangular and scalene in shape outline with a convoluted surface dotted with pores and have a protruding ventral apex. Glochidial shells (n = 60) measured 260.0 μm long (L) (±1.11 SE), 233.1 μm high (H) (± 1.32 SE), with a size of 246.6 μm (± 0.99 SE), hinge length (Hg) of 183.6 μm (± 0.99 SE), larval tooth length (LTL) of 53.6 μm (± 0.84 SE) and angle of obliquity (Á) of 12.9° (± 0.28 SE). Larval teeth are singular in each valve, lack microstylets, have convex or concave basal protuberances on opposing valves and terminate as blunt outward facing spoon-like to peg-like cusps. In comparison to Westralunio carteri, W. albertisi is smaller (d.f., 178; P < 0.001) for L (t = 33.85), H (t = 12.80), Size (t = 28.98), Hg (t = 21.32), H/L (t = −15.06) and Hg/L (t = −4.21). Westralunio albertisi also has a more acute Á than W. carteri (d.f., 71; t, 10.17; P < 0.001), but displays no difference in LTL (d.f., 6; t, 0.16, P = 0.44).
{"title":"Description of the glochidia of Westralunio albertisi Clench, 1957 (Bivalvia: Unionida: Hyriidae) from the Fly River system, Papua New Guinea","authors":"M. Klunzinger","doi":"10.1080/13235818.2023.2203075","DOIUrl":"https://doi.org/10.1080/13235818.2023.2203075","url":null,"abstract":"ABSTRACT Larvae (glochidia) of the freshwater mussel, Westralunio albertisi were obtained from the marsupia of a preserved female at the Western Australian Museum. Glochidial shells of W. albertisi are subtriangular and scalene in shape outline with a convoluted surface dotted with pores and have a protruding ventral apex. Glochidial shells (n = 60) measured 260.0 μm long (L) (±1.11 SE), 233.1 μm high (H) (± 1.32 SE), with a size of 246.6 μm (± 0.99 SE), hinge length (Hg) of 183.6 μm (± 0.99 SE), larval tooth length (LTL) of 53.6 μm (± 0.84 SE) and angle of obliquity (Á) of 12.9° (± 0.28 SE). Larval teeth are singular in each valve, lack microstylets, have convex or concave basal protuberances on opposing valves and terminate as blunt outward facing spoon-like to peg-like cusps. In comparison to Westralunio carteri, W. albertisi is smaller (d.f., 178; P < 0.001) for L (t = 33.85), H (t = 12.80), Size (t = 28.98), Hg (t = 21.32), H/L (t = −15.06) and Hg/L (t = −4.21). Westralunio albertisi also has a more acute Á than W. carteri (d.f., 71; t, 10.17; P < 0.001), but displays no difference in LTL (d.f., 6; t, 0.16, P = 0.44).","PeriodicalId":18857,"journal":{"name":"Molluscan Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41713378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-03DOI: 10.1080/13235818.2023.2201904
İhsan Ekin
ABSTRACT The purpose of this study is to describe the reproductive processes of the snails Helix lucorum and Eobania vermiculata, which are abundant in Diyarbakır, SE Turkey. Reproductive behaviours and eggs of E. vermiculata and H. lucorum were monitored in the gardens of the Commodity Exchange Building, and Hevsel Gardens. The habitats of the species were observed over a one-year period (2022–2023). Helix lucorum reproduction takes place at the age of three to four years, from late October to December. The weight of the adult snails was 22 ± 4 g. The snails laid an average of 82 ± 12 eggs, with a weight of 0.23 ± 0.03 mg, and diameter of 5 mm; they hatched in 30 ± 4 days. Eobania vermiculata reproduction takes place at the age of two years, and breeding is mainly from early October to early December. The adult snails weighed 12 ± 4 g, and laid an average of 70 ± 14 eggs, with each egg weighing 0.16 ± 0.04 mg and measuring 3 mm in diameter. They hatched in 32 ± 5 days. In summary, the study offers details on the reproductive processes of two commercially significant snails, whose breeding habits may vary based on local climatic conditions.
{"title":"Reproductive processes of the edible snails Helix lucorum (Linnaeus, 1758) and Eobania vermiculata (O.F. Müller, 1774) in their natural habitats","authors":"İhsan Ekin","doi":"10.1080/13235818.2023.2201904","DOIUrl":"https://doi.org/10.1080/13235818.2023.2201904","url":null,"abstract":"ABSTRACT The purpose of this study is to describe the reproductive processes of the snails Helix lucorum and Eobania vermiculata, which are abundant in Diyarbakır, SE Turkey. Reproductive behaviours and eggs of E. vermiculata and H. lucorum were monitored in the gardens of the Commodity Exchange Building, and Hevsel Gardens. The habitats of the species were observed over a one-year period (2022–2023). Helix lucorum reproduction takes place at the age of three to four years, from late October to December. The weight of the adult snails was 22 ± 4 g. The snails laid an average of 82 ± 12 eggs, with a weight of 0.23 ± 0.03 mg, and diameter of 5 mm; they hatched in 30 ± 4 days. Eobania vermiculata reproduction takes place at the age of two years, and breeding is mainly from early October to early December. The adult snails weighed 12 ± 4 g, and laid an average of 70 ± 14 eggs, with each egg weighing 0.16 ± 0.04 mg and measuring 3 mm in diameter. They hatched in 32 ± 5 days. In summary, the study offers details on the reproductive processes of two commercially significant snails, whose breeding habits may vary based on local climatic conditions.","PeriodicalId":18857,"journal":{"name":"Molluscan Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42738307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-03DOI: 10.1080/13235818.2023.2217677
S. Nowland, B. Roberts
ABSTRACT The blacklip rock oyster, Saccostrea lineage J, has the potential to support new aquaculture developments throughout its range in the tropical Indo-Pacific region, but lack of research investment in understanding basic biology has been a key failure point in the past. This study assessed Saccostrea lineage J spat growth and survival in downweller and upweller nursery systems, with the aim of establishing baseline biological information and evaluating spat performance to support commercialisation efforts. Downweller and upweller nursery systems were similarly effective at rearing spat, with mean dorsoventral measurement in both systems reaching a 5 mm deployment size at 59 days post hatch. Growth rates reported in this study of 0.19 and 0.20 mm day−1 in the downweller and upweller, respectively, are comparable to other hatchery-produced tropical and subtropical bivalve spat. Based on the results of this study, it is recommended that spat be held in nurseries for approximately two months to reach a 5 mm deployment size. The information obtained in this study is the first documentation of Saccostrea lineage J spat growth and survival, and the methods used provide a basis for commercial production of this species.
摘要黑唇岩牡蛎，Saccostrea谱系J，有潜力支持热带印度-太平洋地区新的水产养殖发展，但缺乏对基础生物学的研究投资一直是过去的一个关键失败点。本研究评估了Saccostrea谱系J唾沫在下向和上向苗圃系统中的生长和存活，目的是建立基线生物信息并评估唾沫的表现，以支持商业化努力。下行式和上行式育婴系统在饲养吐口水方面同样有效，两个系统的平均背腔测量值均达到5 孵化后59天部署尺寸为mm。本研究报告的增长率分别为0.19和0.20 mm day−1，与其他孵化场生产的热带和亚热带双壳类幼体相当。根据这项研究的结果，建议在托儿所进行大约两个月的吐口水，以达到5 mm部署尺寸。本研究中获得的信息是首次记录Saccotrea谱系J的生长和存活，所使用的方法为该物种的商业生产提供了基础。
{"title":"Assessment of blacklip rock oyster, Saccostrea lineage J, spat growth and survival in recirculating upweller and downweller nursery systems","authors":"S. Nowland, B. Roberts","doi":"10.1080/13235818.2023.2217677","DOIUrl":"https://doi.org/10.1080/13235818.2023.2217677","url":null,"abstract":"ABSTRACT The blacklip rock oyster, Saccostrea lineage J, has the potential to support new aquaculture developments throughout its range in the tropical Indo-Pacific region, but lack of research investment in understanding basic biology has been a key failure point in the past. This study assessed Saccostrea lineage J spat growth and survival in downweller and upweller nursery systems, with the aim of establishing baseline biological information and evaluating spat performance to support commercialisation efforts. Downweller and upweller nursery systems were similarly effective at rearing spat, with mean dorsoventral measurement in both systems reaching a 5 mm deployment size at 59 days post hatch. Growth rates reported in this study of 0.19 and 0.20 mm day−1 in the downweller and upweller, respectively, are comparable to other hatchery-produced tropical and subtropical bivalve spat. Based on the results of this study, it is recommended that spat be held in nurseries for approximately two months to reach a 5 mm deployment size. The information obtained in this study is the first documentation of Saccostrea lineage J spat growth and survival, and the methods used provide a basis for commercial production of this species.","PeriodicalId":18857,"journal":{"name":"Molluscan Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44096798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-03DOI: 10.1080/13235818.2023.2202807
F. Köhler, D. Herbert, B. Rowson, G. Rosenberg
ABSTRACT The name Bulimus ovoideus Bruguière, 1789 is in current use for two different species, one from East Africa and one from the Philippines. The name has also been declared as the type species of both Edentulina Pfeiffer, 1856 (Streptaxidae) and Cochlostyla Férussac, 1821 (Camaenidae). We demonstrate that the use of this name for a Philippine camaenid is based on an early misidentification. To clarify the situation, we invoke Article 70.3 of the Code of Zoological Nomenclature, concerning misidentified type species, to select the taxonomic species actually involved, Bulinus luzonicus Sowerby I, 1833, as the type species of Cochlostyla. Cochlostyla thus becomes a senior objective synonym of Canistrum Mörch, 1852. Under Article 40.2 of the Code, Helicostylinae Ihering, 1909 takes precedence of Cochlostylinae Möllendorff, 1890. We further show that the Philippine camaenids Orthostylus Beck, 1837 and Dryocochlias Möllendorff, 1898 are objective synonyms with the former name having priority. Finally, we designate a neotype for Bulimus ovoideus to stabilise its taxonomy. These actions permit the current nomenclature to be maintained with a minimum of disruption. The currently accepted name of the taxon in question is Edentulina ovoidea (Bruguière, 1789).
{"title":"The double life of Bulimus ovoideus Bruguière, 1789: taxonomic implications for Streptaxidae and Camaenidae (Mollusca, Stylommatophora)","authors":"F. Köhler, D. Herbert, B. Rowson, G. Rosenberg","doi":"10.1080/13235818.2023.2202807","DOIUrl":"https://doi.org/10.1080/13235818.2023.2202807","url":null,"abstract":"ABSTRACT The name Bulimus ovoideus Bruguière, 1789 is in current use for two different species, one from East Africa and one from the Philippines. The name has also been declared as the type species of both Edentulina Pfeiffer, 1856 (Streptaxidae) and Cochlostyla Férussac, 1821 (Camaenidae). We demonstrate that the use of this name for a Philippine camaenid is based on an early misidentification. To clarify the situation, we invoke Article 70.3 of the Code of Zoological Nomenclature, concerning misidentified type species, to select the taxonomic species actually involved, Bulinus luzonicus Sowerby I, 1833, as the type species of Cochlostyla. Cochlostyla thus becomes a senior objective synonym of Canistrum Mörch, 1852. Under Article 40.2 of the Code, Helicostylinae Ihering, 1909 takes precedence of Cochlostylinae Möllendorff, 1890. We further show that the Philippine camaenids Orthostylus Beck, 1837 and Dryocochlias Möllendorff, 1898 are objective synonyms with the former name having priority. Finally, we designate a neotype for Bulimus ovoideus to stabilise its taxonomy. These actions permit the current nomenclature to be maintained with a minimum of disruption. The currently accepted name of the taxon in question is Edentulina ovoidea (Bruguière, 1789).","PeriodicalId":18857,"journal":{"name":"Molluscan Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46118819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-03DOI: 10.1080/13235818.2023.2212413
Aleksandra Jaszczyńska, A. Osikowski, A. Falniowski, Sebastian Hofman
ABSTRACT Emmericia Brusina, 1870 is the only genus of the family Emmericiidae Brusina, 1870, and it inhabits springs and rivers from north-east Italy to southern Croatia, Bosnia and Herzegovina, and Montenegro. Their variable shells have resulted in taxonomic chaos with from one to sixty seven species recognised in Emmericia. Recently four species have been distinguished: E. patula (Brumati, 1838), E. expansilabris Bourguignat, 1881, E. narentana Bourguignat, 1881, and E. ventricosa Brusina, 1870. In the present study, Emmericia from 13 localities were collected. Principal component analysis on seven biometric characters measured on shells from three localities inhabited by two nominal species demonstrated the distinctiveness of these three studied populations. In contrast, the differences between the two populations representing E. patula were not smaller than between either of them and E. expansilabris. Similar remarks apply to the shells of the other two species. The sequences of the cytochrome oxidase subunit I did not confirm that E. expansilabris is a distinct species, so it is regarded as a synonym of E. patula, but did confirm the distinctness of E. ventricosa, which inhabits the localities higher above sea level. No sequences of E. narentana were obtained.
{"title":"Towards understanding of the taxonomy within the genus Emmericia Brusina, 1870 (Caenogastropoda: Truncatelloidea)","authors":"Aleksandra Jaszczyńska, A. Osikowski, A. Falniowski, Sebastian Hofman","doi":"10.1080/13235818.2023.2212413","DOIUrl":"https://doi.org/10.1080/13235818.2023.2212413","url":null,"abstract":"ABSTRACT Emmericia Brusina, 1870 is the only genus of the family Emmericiidae Brusina, 1870, and it inhabits springs and rivers from north-east Italy to southern Croatia, Bosnia and Herzegovina, and Montenegro. Their variable shells have resulted in taxonomic chaos with from one to sixty seven species recognised in Emmericia. Recently four species have been distinguished: E. patula (Brumati, 1838), E. expansilabris Bourguignat, 1881, E. narentana Bourguignat, 1881, and E. ventricosa Brusina, 1870. In the present study, Emmericia from 13 localities were collected. Principal component analysis on seven biometric characters measured on shells from three localities inhabited by two nominal species demonstrated the distinctiveness of these three studied populations. In contrast, the differences between the two populations representing E. patula were not smaller than between either of them and E. expansilabris. Similar remarks apply to the shells of the other two species. The sequences of the cytochrome oxidase subunit I did not confirm that E. expansilabris is a distinct species, so it is regarded as a synonym of E. patula, but did confirm the distinctness of E. ventricosa, which inhabits the localities higher above sea level. No sequences of E. narentana were obtained.","PeriodicalId":18857,"journal":{"name":"Molluscan Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48129528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-03DOI: 10.1080/13235818.2023.2214156
R. Braley
ABSTRACT Four giant clam species were monitored for population abundance, recruitment, growth and spatial distribution over three decades. Natural, undisturbed populations were mapped at five sites on the Great Barrier Reef from surveys in 1982–1986, 1987–1992, 2007–2009 and 2017. Populations of all species declined at three sites due to low recruitment and death of old clams. At two sites a significant juvenile recruitment cohort of Tridacna gigas and T. derasa followed a mass mortality event which returned the population to the pre-mass mortality abundance. At one site 55.5% of the cohort survived after five years. Population abundance of T. squamosa and Hippopus hippopus increased slightly at the 2017 survey at these two sites. Tridacna gigas and T. derasa live long enough to reproduce successfully in some years, as evidenced by recruitment. Where significant recruitment occurred, high-aggregation reproductive centres may remain functional for many decades. Individual growth rate from the recruitment surveys averaged six cm yr−1 to five years. Longer-term growth rates averaged nearly two cm yr−1 with the highest rate being over four cm yr−1. Climate change will have some deleterious effects on giant clam populations.
摘要对四种巨蚌的种群丰度、繁殖、生长和空间分布进行了30多年的监测。根据1982年至1986年、1987年至1992年、2007年至2009年和2017年的调查，在大堡礁的五个地点绘制了自然、未受干扰的种群地图。由于老蛤蜊的大量繁殖和死亡，三个地点的所有物种的数量都有所下降。在两个地点，在大规模死亡事件发生后，一个重要的巨型Tridacna gigas和T.derasa青少年招募队列将种群恢复到大规模死亡前的丰度。在一个地点，55.5%的队列在五年后存活。在2017年对这两个地点的调查中，鳞片T.squamosa和河马的种群丰度略有增加。巨型Tridacna gigas和T.derasa的寿命足以在几年内成功繁殖，招募就是明证。在大量招聘的地方，高聚集性生殖中心可能会在几十年内保持运作。招聘调查中的个人增长率平均为6厘米-年-1至5年。长期增长率平均接近2 cm yr−1，最高增长率超过4 cm yr–1。气候变化将对巨蚌种群产生一些有害影响。
{"title":"A population study of giant clams (Tridacninae) on the Great Barrier Reef over three-decades","authors":"R. Braley","doi":"10.1080/13235818.2023.2214156","DOIUrl":"https://doi.org/10.1080/13235818.2023.2214156","url":null,"abstract":"ABSTRACT Four giant clam species were monitored for population abundance, recruitment, growth and spatial distribution over three decades. Natural, undisturbed populations were mapped at five sites on the Great Barrier Reef from surveys in 1982–1986, 1987–1992, 2007–2009 and 2017. Populations of all species declined at three sites due to low recruitment and death of old clams. At two sites a significant juvenile recruitment cohort of Tridacna gigas and T. derasa followed a mass mortality event which returned the population to the pre-mass mortality abundance. At one site 55.5% of the cohort survived after five years. Population abundance of T. squamosa and Hippopus hippopus increased slightly at the 2017 survey at these two sites. Tridacna gigas and T. derasa live long enough to reproduce successfully in some years, as evidenced by recruitment. Where significant recruitment occurred, high-aggregation reproductive centres may remain functional for many decades. Individual growth rate from the recruitment surveys averaged six cm yr−1 to five years. Longer-term growth rates averaged nearly two cm yr−1 with the highest rate being over four cm yr−1. Climate change will have some deleterious effects on giant clam populations.","PeriodicalId":18857,"journal":{"name":"Molluscan Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47075619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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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