Chanikan Katnoum, Tosaphol Saetung Keetapithchayakul, Azman Abdul Rahim, Koraon Wongkamhaeng
The first representative of the genus Cerapus in the Gulf of Thailand, Cerapus rivulus sp. nov., is described from specimens sampled from Mae Klong Estuary, the inner Gulf of Thailand. The main identifying characteristics of this new amphipod species are pereonites 1 and 2 without constriction; male gnathopod propodus palm transverse with long posterior defining tooth and well-developed anterodistal recurved tooth adjacent to propodus articulation; pereopod 6 coxa without fine fringe setae ventrally, basis with setae on posterior margin; and telson with deep cleft. An updated identification key for the 25 known species in the genus is also presented. A discussion on their nesting and types of mating behaviour is provided.
{"title":"A new species of Cerapus (Amphipoda, Senticaudata, Ischyroceridae) from Mae Klong Estuary, with a discussion on their nesting and types of mating behaviour","authors":"Chanikan Katnoum, Tosaphol Saetung Keetapithchayakul, Azman Abdul Rahim, Koraon Wongkamhaeng","doi":"10.3897/zse.99.107974","DOIUrl":"https://doi.org/10.3897/zse.99.107974","url":null,"abstract":"The first representative of the genus Cerapus in the Gulf of Thailand, Cerapus rivulus sp. nov., is described from specimens sampled from Mae Klong Estuary, the inner Gulf of Thailand. The main identifying characteristics of this new amphipod species are pereonites 1 and 2 without constriction; male gnathopod propodus palm transverse with long posterior defining tooth and well-developed anterodistal recurved tooth adjacent to propodus articulation; pereopod 6 coxa without fine fringe setae ventrally, basis with setae on posterior margin; and telson with deep cleft. An updated identification key for the 25 known species in the genus is also presented. A discussion on their nesting and types of mating behaviour is provided.","PeriodicalId":48677,"journal":{"name":"Zoosystematics and Evolution","volume":"22 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138510227","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}
This study describes Gnorimosphaeroma rivularesp. nov. from a stream on Chichi-jima Island, Ogasawara Islands, Japan. This is the second freshwater species of Gnorimosphaeroma and the third Sphaeromatidae from oceanic islands. Gnorimosphaeroma rivularesp. nov. is morphologically similar to G. boninense Nunomura, 2006, G. naktongense Kwon & Kim, 1987 and G. saijoense Nunomura, 2013. However, G. rivularesp. nov. differs from these species in various morphological features, such as the shape of pleotelson and pereopod 2, relative length of antennule peduncular articles and pleopod 3 rami, number of setae on maxillula and maxilliped, and setation on pereopod 3. Phylogenetic analyses revealed that G. akanense is sister to G. saijoense, and together they are sister to G. hokurikuense. This three taxa clade is sister to G. rivularesp. nov. with G. iriei basal to them all. Our analysis concludes that G. boninense from Haha-jima Island, Ogasawara Islands is only distantly related to G. rivulare and may represent an independent colonization event.
本研究描述了一种河流黑斑血肿。11月摄于日本小笠原群岛一岛的小溪上。这是褐藻属的第二个淡水种和第三个来自海洋岛屿的褐藻科。Gnorimosphaeroma rivularesp。11 .在形态上与G. boninense numura, 2006, G. naktongense Kwon & Kim, 1987和G. saijoense numura, 2013相似。然而，G. rivularesp。11 .在形态特征上与这些种不同，如多肢肢和准足类2的形状、触角柄花序和准足类3支的相对长度、上唇和上唇上的刚毛数量以及准足类3上的坐位。系统发育分析表明，赤蛇属与齐氏蛇属为姊妹，与北栗蛇属为姊妹。这三个分类群分支是G. rivularesp.的姊妹分支。11月，在它们的基部有鸢尾。结果表明，来自小笠原群岛哈哈哈岛的G. boninense与G. rivulare的亲缘关系较远，可能代表了一个独立的殖民事件。
{"title":"A new freshwater species of Gnorimosphaeroma (Crustacea, Isopoda, Sphaeromatidae) from Chichi-jima Island, Ogasawara Islands, Japan","authors":"Ko Tomikawa, Junpei Yoshii, Akari Noda, Chi-Woo Lee, Tetsuro Sasaki, Naoya Kimura, Noboru Nunomura","doi":"10.3897/zse.99.108032","DOIUrl":"https://doi.org/10.3897/zse.99.108032","url":null,"abstract":"This study describes Gnorimosphaeroma rivularesp. nov. from a stream on Chichi-jima Island, Ogasawara Islands, Japan. This is the second freshwater species of Gnorimosphaeroma and the third Sphaeromatidae from oceanic islands. Gnorimosphaeroma rivularesp. nov. is morphologically similar to G. boninense Nunomura, 2006, G. naktongense Kwon & Kim, 1987 and G. saijoense Nunomura, 2013. However, G. rivularesp. nov. differs from these species in various morphological features, such as the shape of pleotelson and pereopod 2, relative length of antennule peduncular articles and pleopod 3 rami, number of setae on maxillula and maxilliped, and setation on pereopod 3. Phylogenetic analyses revealed that G. akanense is sister to G. saijoense, and together they are sister to G. hokurikuense. This three taxa clade is sister to G. rivularesp. nov. with G. iriei basal to them all. Our analysis concludes that G. boninense from Haha-jima Island, Ogasawara Islands is only distantly related to G. rivulare and may represent an independent colonization event.","PeriodicalId":48677,"journal":{"name":"Zoosystematics and Evolution","volume":"21 9","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138510229","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}
Ondřej Korábek, Igor Balashov, Marco T. Neiber, Frank Walther, Bernhard Hausdorf
The Caucasus and the adjacent Pontic Mountains in north-eastern Anatolia are home to numerous endemic land snail genera and species. The diversity of the region is the result of both intra-regional speciation and the persistence of relict lineages. The same seemed to be true for the genus Helix, which has been present in the Greater Caucasus since the Miocene. In the Caucasus region, there are three Helix species. Helix buchii (Pontic Mountains and Georgia) and Helix albescens (southern Ukraine to northern Lesser Caucasus) are both separated by deep splits from the major Helix clades in the mitochondrial phylogeny. In contrast, Helix lucorum belongs to the Anatolian radiation of Helix. At least part of its intraspecific diversification may have occurred in north-eastern Anatolia and the adjacent parts of the Caucasus. Here, we report new evidence suggesting that the Caucasus and the Pontus regions were less important as a refugium of ancient Helix lineages or as a diversification centre than previously hypothesised. Helix lucorum probably diversified more westwards, while H. buchii is a less ancient lineage than previously thought. Helix albescens had its long-term refugium on the Crimean Peninsula in southern Ukraine, not in the Caucasus. The Caucasus is close to the eastern limit of the distribution range of the genus and, although the fossil record shows that Helix was present there as early as the Miocene, the current diversity of the genus there is the result of much later colonisation.
{"title":"The Caucasus is neither a cradle nor a museum of diversity of the land snail genus Helix (Gastropoda, Stylommatophora, Helicidae), while Crimea is home to an ancient lineage","authors":"Ondřej Korábek, Igor Balashov, Marco T. Neiber, Frank Walther, Bernhard Hausdorf","doi":"10.3897/zse.99.110610","DOIUrl":"https://doi.org/10.3897/zse.99.110610","url":null,"abstract":"The Caucasus and the adjacent Pontic Mountains in north-eastern Anatolia are home to numerous endemic land snail genera and species. The diversity of the region is the result of both intra-regional speciation and the persistence of relict lineages. The same seemed to be true for the genus Helix, which has been present in the Greater Caucasus since the Miocene. In the Caucasus region, there are three Helix species. Helix buchii (Pontic Mountains and Georgia) and Helix albescens (southern Ukraine to northern Lesser Caucasus) are both separated by deep splits from the major Helix clades in the mitochondrial phylogeny. In contrast, Helix lucorum belongs to the Anatolian radiation of Helix. At least part of its intraspecific diversification may have occurred in north-eastern Anatolia and the adjacent parts of the Caucasus. Here, we report new evidence suggesting that the Caucasus and the Pontus regions were less important as a refugium of ancient Helix lineages or as a diversification centre than previously hypothesised. Helix lucorum probably diversified more westwards, while H. buchii is a less ancient lineage than previously thought. Helix albescens had its long-term refugium on the Crimean Peninsula in southern Ukraine, not in the Caucasus. The Caucasus is close to the eastern limit of the distribution range of the genus and, although the fossil record shows that Helix was present there as early as the Miocene, the current diversity of the genus there is the result of much later colonisation.","PeriodicalId":48677,"journal":{"name":"Zoosystematics and Evolution","volume":"21 12","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138510228","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}
Fotolaimus cavus sp. nov. was described from a submarine anchialine cave called Akuma-no-yakata on the Shimoji Island, Miyako Island Group, Ryukyu Islands, southwestern Japan. This is the first free-living marine nematode isolated from a submarine cave in Japan, and the third species of the genus Fotolaimus . This new species differs from its congeners by its small body size, wide amphids, long buccal cavity, long conico-cylindrical tail, and proximally curved gubernaculum. We provide amended dichotomous keys to genera in the subfamily Oncholaiminae and species in Fotolaimus . We also analyzed partial DNA sequences encoding ribosomal small subunit RNA and cytochrome c oxidase subunit I from Fotolaimus cavus sp. nov. and six other species of Oncholaimidae collected from Japanese waters. The phylogenetic tree based on the ribosomal small subunit RNA sequences using maximum likelihood analysis suggested a close relationship between Fotolaimus and Wiesoncholaimus as well as Oncholaimus . The topology of the tree was similar to those from previous studies; however, it suggested a new phylogenetic position of Adoncholaimus as a sister clade for Viscosia and Oncholaimus .
{"title":"A new species of free-living marine nematode, Fotolaimus cavus sp. nov. (Nematoda, Oncholaimida, Oncholaimidae), isolated from a submarine anchialine cave in the Ryukyu Islands, southwestern Japan","authors":"Daisuke Shimada, Keiichi Kakui, Yoshihisa Fujita","doi":"10.3897/zse.99.109097","DOIUrl":"https://doi.org/10.3897/zse.99.109097","url":null,"abstract":"Fotolaimus cavus sp. nov. was described from a submarine anchialine cave called Akuma-no-yakata on the Shimoji Island, Miyako Island Group, Ryukyu Islands, southwestern Japan. This is the first free-living marine nematode isolated from a submarine cave in Japan, and the third species of the genus Fotolaimus . This new species differs from its congeners by its small body size, wide amphids, long buccal cavity, long conico-cylindrical tail, and proximally curved gubernaculum. We provide amended dichotomous keys to genera in the subfamily Oncholaiminae and species in Fotolaimus . We also analyzed partial DNA sequences encoding ribosomal small subunit RNA and cytochrome c oxidase subunit I from Fotolaimus cavus sp. nov. and six other species of Oncholaimidae collected from Japanese waters. The phylogenetic tree based on the ribosomal small subunit RNA sequences using maximum likelihood analysis suggested a close relationship between Fotolaimus and Wiesoncholaimus as well as Oncholaimus . The topology of the tree was similar to those from previous studies; however, it suggested a new phylogenetic position of Adoncholaimus as a sister clade for Viscosia and Oncholaimus .","PeriodicalId":48677,"journal":{"name":"Zoosystematics and Evolution","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135635188","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}
Historical data, combined with current data on species distribution, are a valuable resource for tracking changes in biodiversity and can potentially be applied to developing models in conservation biology and designing and assessing conservation strategies. Historical data supporting current knowledge on the natural history of the African continent are primarily held in Western museums. The Zoologisches Museum Berlin (ZMB), which is today part of the Museum für Naturkunde Berlin (MfN), is the primary source of reference for zoological collections from former German colonial territories including Cameroon. Here, we document for the first time a catalogue of the type material in the mammal collection of the MfN from the point of view of a geographical region. The type collection includes 91 type specimens identified in the catalogues as originating from German ‘Kamerun’ and which correspond to 31 described species, of which 12 are currently accepted (valid) species names. Of the 31 described species, 21 are represented by holotypes, three para-holotype series, one para-lectotype series and six syntype series. We hope that this first analysis of zoological objects, based on geographical location, will lead to similar research on other geographical locations of collection. This could provide more information on the provenance of collections and on colonial collecting practices, as well as contribute to the accessibility of collections in Western museums.
{"title":"Mammalian type material from Cameroon in the Museum für Naturkunde Berlin","authors":"Paul Taku Bisong, Jason Dunlop, Catarina Madruga","doi":"10.3897/zse.99.110878","DOIUrl":"https://doi.org/10.3897/zse.99.110878","url":null,"abstract":"Historical data, combined with current data on species distribution, are a valuable resource for tracking changes in biodiversity and can potentially be applied to developing models in conservation biology and designing and assessing conservation strategies. Historical data supporting current knowledge on the natural history of the African continent are primarily held in Western museums. The Zoologisches Museum Berlin (ZMB), which is today part of the Museum für Naturkunde Berlin (MfN), is the primary source of reference for zoological collections from former German colonial territories including Cameroon. Here, we document for the first time a catalogue of the type material in the mammal collection of the MfN from the point of view of a geographical region. The type collection includes 91 type specimens identified in the catalogues as originating from German ‘Kamerun’ and which correspond to 31 described species, of which 12 are currently accepted (valid) species names. Of the 31 described species, 21 are represented by holotypes, three para-holotype series, one para-lectotype series and six syntype series. We hope that this first analysis of zoological objects, based on geographical location, will lead to similar research on other geographical locations of collection. This could provide more information on the provenance of collections and on colonial collecting practices, as well as contribute to the accessibility of collections in Western museums.","PeriodicalId":48677,"journal":{"name":"Zoosystematics and Evolution","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135730133","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}
Changting An, Ang Li, Huan Wang, Busu Li, Kaiying Liu, Hongyue Sun, Shufang Liu, Zhimeng Zhuang, Richard van der Laan
During the 2022 R/V cruises in the Yellow Sea, four goby specimens (51.2‒63.5 mm) were captured by using an Agassiz trawl at a water depth of about 70 meters. These specimens were identified as Suruga fundicola , mainly by the morphometric characters. Their identification was further confirmed by a molecular phylogenetic analysis based on 12S and COI mtDNA genes. Considering that the four specimens were in good condition and that the original description is brief, a detailed description of the specimens is given. Moreover, the present study presents a preliminary analysis of its phylogenetic position within the Acanthogobius -lineage (Gobiidae). The discovery of this goby in the Yellow Sea enriches our knowledge of the fish diversity and distribution of this region, and sheds some light on the ecological habitat of these gobies.
{"title":"Identification of the rare deep-dwelling goby Suruga fundicola Jordan & Snyder, 1901 (Gobiiformes, Gobiidae) from the Yellow Sea","authors":"Changting An, Ang Li, Huan Wang, Busu Li, Kaiying Liu, Hongyue Sun, Shufang Liu, Zhimeng Zhuang, Richard van der Laan","doi":"10.3897/zse.99.102345","DOIUrl":"https://doi.org/10.3897/zse.99.102345","url":null,"abstract":"During the 2022 R/V cruises in the Yellow Sea, four goby specimens (51.2‒63.5 mm) were captured by using an Agassiz trawl at a water depth of about 70 meters. These specimens were identified as Suruga fundicola , mainly by the morphometric characters. Their identification was further confirmed by a molecular phylogenetic analysis based on 12S and COI mtDNA genes. Considering that the four specimens were in good condition and that the original description is brief, a detailed description of the specimens is given. Moreover, the present study presents a preliminary analysis of its phylogenetic position within the Acanthogobius -lineage (Gobiidae). The discovery of this goby in the Yellow Sea enriches our knowledge of the fish diversity and distribution of this region, and sheds some light on the ecological habitat of these gobies.","PeriodicalId":48677,"journal":{"name":"Zoosystematics and Evolution","volume":"301 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134975160","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}
Oxynoemacheilus sakaryaensis sp. nov. , is restricted to the Sakarya River basin, and O. melenicus sp. nov. , is distributed in both the Sakarya River and Büyükmelen Stream. Oxynoemacheilus sakaryaensis is distinguished by having a flank plain or with numerous irregularly shaped pale brownish bars and a caudal-peduncle depth 2.8–3.2 times in its length. Oxynoemacheilus melenicus is distinguished by having a flank with 10–13 irregular shaped brownish bars or blotches and the caudal peduncle depth 1.9–2.8 times in its length. Oxynoemacheilus banarescui , O. samanticus , O. simavicus , O. fatsaensis , O. sakaryaensis , and O. melenicus are valid, which belong to the O. bergianus species group. O. melenicus and O. sakaryaensis were differentiated from all other Oxynoemacheilus species in western Anatolia by two diagnostic and unique nucleotide substitution sites in the COI barcoding region. Also, species delineation tests (ABGD, GMYC, ASAP) and phylogenetic analyses support the validity of O. melenicus and O. sakaryaensis as distinct species.
{"title":"Two new Oxynoemacheilus species in western Anatolia (Teleostei, Nemacheilidae)","authors":"Davut Turan, Sadi Aksu, Gökhan Kalayci","doi":"10.3897/zse.99.102575","DOIUrl":"https://doi.org/10.3897/zse.99.102575","url":null,"abstract":"Oxynoemacheilus sakaryaensis sp. nov. , is restricted to the Sakarya River basin, and O. melenicus sp. nov. , is distributed in both the Sakarya River and Büyükmelen Stream. Oxynoemacheilus sakaryaensis is distinguished by having a flank plain or with numerous irregularly shaped pale brownish bars and a caudal-peduncle depth 2.8–3.2 times in its length. Oxynoemacheilus melenicus is distinguished by having a flank with 10–13 irregular shaped brownish bars or blotches and the caudal peduncle depth 1.9–2.8 times in its length. Oxynoemacheilus banarescui , O. samanticus , O. simavicus , O. fatsaensis , O. sakaryaensis , and O. melenicus are valid, which belong to the O. bergianus species group. O. melenicus and O. sakaryaensis were differentiated from all other Oxynoemacheilus species in western Anatolia by two diagnostic and unique nucleotide substitution sites in the COI barcoding region. Also, species delineation tests (ABGD, GMYC, ASAP) and phylogenetic analyses support the validity of O. melenicus and O. sakaryaensis as distinct species.","PeriodicalId":48677,"journal":{"name":"Zoosystematics and Evolution","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135590330","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}
Juliana Lopes Segadilha, Graham Bird, Marcos Tavares
Benthic samples collected from depths ranging between 686 and 2410 m along the Brazilian continental upper slope from Rio de Janeiro State to Santa Catarina State (23°S to 27°S) yielded a wealth of tanaidacean material, including two new species of Stenotanais . This is the first described species of the family Akanthophoreidae from Brazilian waters. Stenotanais leonardoi sp. nov. has a combination of unique characters including the uropod basal article longer than the pleotelson and the exopod somewhat wider than the endopod, longer than the endopod article-1 (0.7 times endopod length) and supporting two flat and wide terminal setae. Stenotanais uropedon sp. nov. is recognisable by its oar-shaped uropod endopod, with article-2 large, broad and flattened and the short exopod, only 0.3 times the endopod length. An identification key to the species of Stenotanais is given. These two species bring the total number of described akanthophoreids to 56 species and that of all tanaidaceans in Brazilian waters to 66 species.
{"title":"Stenotanais (Crustacea, Tanaidacea) from the Santos Basin: the first described species of the family Akanthophoreidae off the Brazilian coast","authors":"Juliana Lopes Segadilha, Graham Bird, Marcos Tavares","doi":"10.3897/zse.99.103003","DOIUrl":"https://doi.org/10.3897/zse.99.103003","url":null,"abstract":"Benthic samples collected from depths ranging between 686 and 2410 m along the Brazilian continental upper slope from Rio de Janeiro State to Santa Catarina State (23°S to 27°S) yielded a wealth of tanaidacean material, including two new species of Stenotanais . This is the first described species of the family Akanthophoreidae from Brazilian waters. Stenotanais leonardoi sp. nov. has a combination of unique characters including the uropod basal article longer than the pleotelson and the exopod somewhat wider than the endopod, longer than the endopod article-1 (0.7 times endopod length) and supporting two flat and wide terminal setae. Stenotanais uropedon sp. nov. is recognisable by its oar-shaped uropod endopod, with article-2 large, broad and flattened and the short exopod, only 0.3 times the endopod length. An identification key to the species of Stenotanais is given. These two species bring the total number of described akanthophoreids to 56 species and that of all tanaidaceans in Brazilian waters to 66 species.","PeriodicalId":48677,"journal":{"name":"Zoosystematics and Evolution","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135591416","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}
Aquatic species (such as fish, amphipods, isopods, hirudineans etc.) adapted to environmental conditions can live in caves connected to groundwater. The species of Niphargus and Gammarus are the most commonly encountered amphipods in caves. Türkiye is very rich in terms of karst areas and is home to more than 2000 known caves. Fakıllı Cave, located in Düzce Province in the Western Anatolian Region, has a length of 1071 m. A new amphipod species belonging to the Gammarus genus has been identified from the cave and named as Gammarus kunti sp. nov. Some of the characteristic features of the newly-identified species can be listed as “Medium-large size; smooth body, well-developed and reniform eyes; non-prolonged extremities; antennal gland cone is straight and long; second antenna with setose peduncular and flagellar segments; medial palmar spine present; posterior margin of pereopod 3 densely setose; anterior margins of pereopods 6 and 7 armed with spines only; epimeral plates not pointed”. Although the mentioned features are generally seen in epigean species, the members of this species were sampled from the dark zone of the Fakıllı Cave. The partial sequences of the COI (573 bp) and 28S (914 bp) genes of the newly-described species, Gammarus kunti sp. nov. , were generated. The pairwise genetic distances between the new species, Gammarus kunti sp. nov. and other species ranged from a minimum of 16.23% ( G. tumaf ) to a maximum of 28.27% ( G. roeselii ) for the COI gene and a minimum of 0.88% ( G. tumaf ) to a maximum of 6.81% ( G. balcanicus ) for the 28S gene. Phylogenies generated by the NJ and ML methods, based on the combined data, assigned the new species as an independent lineage with high support values. In addition, the ASAP method identified the new species as a single MOTU independent of other species. G. tumaf and G. baysali are the sister taxa of G. kunti sp. nov. Detailed descriptions and drawings of the extremities of the male holotype and the female allotype are given and the morphology of the newly-identified species is compared with its relatives.
适应环境条件的水生物种(如鱼类、片足类、等足类、水蛭类等)可以生活在与地下水相连的洞穴中。Niphargus和Gammarus是洞穴中最常见的片脚类动物。t基耶的喀斯特地区非常丰富，有2000多个已知的洞穴。Fakıllı洞穴位于西安纳托利亚地区的d zce省，长度为1071米。在洞穴中发现了一种属于Gammarus属的双足类新物种，并命名为Gammarus kunti sp. 11 . 11 .新发现的物种的一些特征可以被列为“中型;光滑的身体，发育良好的眼睛;non-prolonged四肢;触角腺锥体直而长;第二天线具具刚毛花梗和鞭毛节;内侧掌棘存在;准足类3的后缘密被刚毛;仅具刺的准足动物6和7的前边缘;外板不尖”。虽然上述特征一般见于表生物种，但该物种的成员是从Fakıllı洞穴的暗区取样的。获得了新发现物种Gammarus kunti sp. nov.的COI基因(573 bp)和28S基因(914 bp)的部分序列。新种Gammarus kunti sp. 11与其他物种的COI基因配对距离最小为16.23% (G. tumaf) ~最大28.27% (G. roeselii)， 28S基因配对距离最小为0.88% (G. tumaf) ~最大6.81% (G. balcanicus)。NJ方法和ML方法生成的系统发生系统将该新种划分为一个独立的谱系，具有较高的支持值。此外，ASAP方法将新物种识别为独立于其他物种的单个MOTU。G. tumaf和G. baysali是G. kunti sp. 11的姐妹分类群，对其雄性全型和雌性异型的末端进行了详细的描述和绘制，并与其近缘种进行了形态学比较。
{"title":"A new freshwater amphipod (Amphipoda, Gammaridae) from the Fakıllı Cave, Düzce Türkiye: Gammarus kunti sp. nov.","authors":"Murat Özbek, Hazel Baytaşoğlu, İsmail Aksu","doi":"10.3897/zse.99.108048","DOIUrl":"https://doi.org/10.3897/zse.99.108048","url":null,"abstract":"Aquatic species (such as fish, amphipods, isopods, hirudineans etc.) adapted to environmental conditions can live in caves connected to groundwater. The species of Niphargus and Gammarus are the most commonly encountered amphipods in caves. Türkiye is very rich in terms of karst areas and is home to more than 2000 known caves. Fakıllı Cave, located in Düzce Province in the Western Anatolian Region, has a length of 1071 m. A new amphipod species belonging to the Gammarus genus has been identified from the cave and named as Gammarus kunti sp. nov. Some of the characteristic features of the newly-identified species can be listed as “Medium-large size; smooth body, well-developed and reniform eyes; non-prolonged extremities; antennal gland cone is straight and long; second antenna with setose peduncular and flagellar segments; medial palmar spine present; posterior margin of pereopod 3 densely setose; anterior margins of pereopods 6 and 7 armed with spines only; epimeral plates not pointed”. Although the mentioned features are generally seen in epigean species, the members of this species were sampled from the dark zone of the Fakıllı Cave. The partial sequences of the COI (573 bp) and 28S (914 bp) genes of the newly-described species, Gammarus kunti sp. nov. , were generated. The pairwise genetic distances between the new species, Gammarus kunti sp. nov. and other species ranged from a minimum of 16.23% ( G. tumaf ) to a maximum of 28.27% ( G. roeselii ) for the COI gene and a minimum of 0.88% ( G. tumaf ) to a maximum of 6.81% ( G. balcanicus ) for the 28S gene. Phylogenies generated by the NJ and ML methods, based on the combined data, assigned the new species as an independent lineage with high support values. In addition, the ASAP method identified the new species as a single MOTU independent of other species. G. tumaf and G. baysali are the sister taxa of G. kunti sp. nov. Detailed descriptions and drawings of the extremities of the male holotype and the female allotype are given and the morphology of the newly-identified species is compared with its relatives.","PeriodicalId":48677,"journal":{"name":"Zoosystematics and Evolution","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135644357","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}
Emanuel Pereira, Daniel Roccatagliata, Brenda L. Doti
A new antarcturid isopod, Oxyarcturus holoacanthus sp. nov. , is fully described based on seven specimens collected in the Mar del Plata submarine canyon at 2950 m depth, during the “Talud Continental III” expedition on board the Argentinian RV “Puerto Deseado”. Oxyarcturus holoacanthus sp. nov. is closely related to O. spinosus (Beddard, 1886), from which it can be distinguished by the body spine pattern. The penial plate, a novel character for the genus Oxyarcturus , as well as for the family Antarcturidae, is described in detail. The species O. dubius (Kussakin, 1967) and O. beliaevi (Kussakin, 1967) are considered as incertae sedis until further morphological and molecular data can clarify their taxonomic position. An update of the geographic and bathymetric records of the genus Oxyarcturus is provided.
{"title":"Revision of the genus Oxyarcturus (Isopoda, Valvifera, Antarcturidae), with a description of a new deep-sea species from Argentina","authors":"Emanuel Pereira, Daniel Roccatagliata, Brenda L. Doti","doi":"10.3897/zse.99.106667","DOIUrl":"https://doi.org/10.3897/zse.99.106667","url":null,"abstract":"A new antarcturid isopod, Oxyarcturus holoacanthus sp. nov. , is fully described based on seven specimens collected in the Mar del Plata submarine canyon at 2950 m depth, during the “Talud Continental III” expedition on board the Argentinian RV “Puerto Deseado”. Oxyarcturus holoacanthus sp. nov. is closely related to O. spinosus (Beddard, 1886), from which it can be distinguished by the body spine pattern. The penial plate, a novel character for the genus Oxyarcturus , as well as for the family Antarcturidae, is described in detail. The species O. dubius (Kussakin, 1967) and O. beliaevi (Kussakin, 1967) are considered as incertae sedis until further morphological and molecular data can clarify their taxonomic position. An update of the geographic and bathymetric records of the genus Oxyarcturus is provided.","PeriodicalId":48677,"journal":{"name":"Zoosystematics and Evolution","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135590325","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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