Journal of Zoological Systematics and Evolutionary Research最新文献

{"title":"SNPs Resolve the Phylogenetic History of Chinese Geckos Where mtDNA and Morphology can Mislead","authors":"Jun Xu,&nbsp;Yubin Wo,&nbsp;Hua Feng,&nbsp;Qianjing Lin,&nbsp;Haojie Tong,&nbsp;Zhengjun Wu,&nbsp;Richard P. Brown,&nbsp;Yuanting Jin","doi":"10.1155/jzs/4529791","DOIUrl":"https://doi.org/10.1155/jzs/4529791","url":null,"abstract":"<p>Discordance between mitochondrial DNA (mtDNA) trees and species history is not uncommon and caused by several well-known processes. Differences in phylogenetic signal between loci within the mtDNA genome have received less attention. Large amounts of nuclear genomic data provide the opportunity to resolve uncertain phylogenetic inference in cases of discordance. We examined relationships among three putative divergent lineages of Chinese webbed-toed gecko: <i>Gekko subpalmatus</i>, <i>G. cib</i> (formerly <i>G. subpalmatus</i>) <i>and G. melli</i>. MtDNA sequences (<i>ND2</i>/<i>COXI</i>) were analyzed and an mtDNA tree that supported ((<i>G. melli</i> and <i>G. subpalmatus</i>) and <i>G. cib</i>) was obtained. This differed from a recent well-supported mtDNA–based phylogeny. To resolve this, we estimated species trees using genomic SNPs (from genotyping-by-sequencing), which supported our <i>ND2</i>/<i>COXI</i> tree. We investigated how the mtDNA loci used in these studies might provide discordant phylogenetic signals by comparison of 16 trees obtained from individual mtDNA loci. Well-supported trees, but with two distinct topologies, were obtained for six of the loci, while the remaining 10 loci provided weakly-supported topologies. Only three mtDNA loci provided a well-supported tree that was concordant with the genomic SNPs tree. This suggests that differences in phylogenetic signal across the mitochondrial genome misled previous phylogenetic inference. Divergence time dating revealed quite similar internal node ages, which likely exacerbated this effect. Finally, we analyzed generalized divergence in body dimensions: the two nonsister taxa <i>G. subpalmatus</i> and <i>G. cib</i> were the least divergent lineage pair, potentially explaining previous incorrect conclusions. We conclude that different well-supported phylogenetic histories can be supported by different mtDNA loci while large numbers of genomic SNPs provide more reliable topologies.</p>","PeriodicalId":54751,"journal":{"name":"Journal of Zoological Systematics and Evolutionary Research","volume":"2026 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/jzs/4529791","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147683698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diversity of Chewing Lice (Insecta: Phthiraptera) in the Indo-Burma Biodiversity Hotspot","authors":"Alexandra A. Grossi,&nbsp;Wenyi Zhou,&nbsp;Zhengzhen Wang,&nbsp;Min Zhang,&nbsp;Fasheng Zou,&nbsp;Daniel R. Gustafsson","doi":"10.1155/jzs/1911043","DOIUrl":"https://doi.org/10.1155/jzs/1911043","url":null,"abstract":"<p>The diversity of birds is well documented globally. However, the same attention has generally not been given to their parasites, which comprise many times their diversity. Here, we present data from a large-scale survey of chewing lice found infesting birds in the Indo-Burma biodiversity hotspot of western Yunnan, China. A combination of morphological and phylogenies based on COI barcodes was used to assess the amount of cryptic speciation, host generalists, and variation in host associations. We examined 908 birds, representing 111 species. Overall louse prevalence was 26.3%, and 67 louse species were identified, representing 24 genera, of which 17 species have been previously described. Additionally, 41 new louse/host associations were recorded. Interestingly, <i>Guimaraesiella impiger</i> a well-known host generalist found throughout Southeast Asia was only present on three host individuals despite many of its hosts being examined. Also, <i>Resartor elugeus</i> previously reported from <i>Alcippe fratercula yunnanensis</i> in Yunnan was absent in our sampling despites examining 126 <i>A. f. yunnanensis</i>. However, <i>R. elugeus</i> was found infesting multiple <i>Stachyris nigriceps</i> in our survey. This shift in host association may be due to our sampling sites being at different elevations, but more data needs to be collected before this conclusion can be made. However, we can conclude that this is only a drop in the bucket when it comes the louse diversity of Yunnan. Additionally, the unique mountainous landscape of Yunnan coupled with the bird diversity present has created an environment for the potential of many host switching opportunities.</p>","PeriodicalId":54751,"journal":{"name":"Journal of Zoological Systematics and Evolutionary Research","volume":"2026 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/jzs/1911043","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147683579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Morphological and Phylogenomic Insights Into Hidden Diversity in Coralliidae With Description of a New Species Paraminabea xishaensis sp. nov. From the South China Sea","authors":"Biying Luan,&nbsp;Fei Xia,&nbsp;Kenji Takata,&nbsp;Taisei Kikuchi,&nbsp;Nina Yasuda,&nbsp;Yonghong Liu,&nbsp;Xinming Liu","doi":"10.1155/jzs/5569432","DOIUrl":"https://doi.org/10.1155/jzs/5569432","url":null,"abstract":"<p>The family Coralliidae (Octocorallia) includes ecologically and economically important octocorals that build rigid, three-dimensional skeletal frameworks from shallow reefs to the deep sea. Despite extensive morphological study, species boundaries remain difficult to delimit because of morphological convergence, phenotypic plasticity, and the limited resolution of commonly used molecular markers. During benthic surveys in the Xisha Islands, South China Sea, we discovered a new coralliid species, <i>Paraminabea xishaensis</i> sp. nov. The new species resembles <i>P. aldersladei</i> in overall colony form but can be distinguished by a consistent suite of diagnostic sclerite characters, most notably stalk sclerites with a continuous transverse groove and the presence of six- to eight-radiate forms approaching double stars; autozooid and siphonozooid pores were not apparent. Phylogenomic analyses based on 2903 ultraconserved element (UCE) loci recover <i>P. xishaensis</i> sp. nov. as sister to <i>P. aldersladei</i> with strong support within a family-wide UCE phylogeny framework of Coralliidae, consistent with its recognition as a distinct species. The phylogeny further recovers five deeply divergent and internally coherent lineages within Coralliidae: <i>Sphaerasclera</i>, <i>Paraminabea</i>, a clade comprising <i>Sibogagorgia</i>, <i>Paragorgia</i>, <i>Hemicorallium</i>, <i>Corallium</i>, and <i>Pleurocorallium</i>, <i>Minabea</i>, and Anthomastinae. This phylogenomic framework provides a comparative baseline for future studies that incorporate expanded sampling and genome-derived single-copy orthologs to investigate adaptive evolution, mitonuclear discordance, and ecological diversification across Coralliidae.</p>","PeriodicalId":54751,"journal":{"name":"Journal of Zoological Systematics and Evolutionary Research","volume":"2026 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/jzs/5569432","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147683537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New Species and Phylogeny of Alentiana Hartman, 1942 (Annelida, Polynoidae) Reveal Polyphyly of Lepidastheniinae and Key Morphological Character Evolution","authors":"Xuwen Wu,&nbsp;Qi Kou,&nbsp;Yu Li,&nbsp;Kuidong Xu","doi":"10.1155/jzs/1266123","DOIUrl":"https://doi.org/10.1155/jzs/1266123","url":null,"abstract":"<p><i>Alentiana</i>, a genus within the subfamily Lepidastheniinae of Polynoidae, is an obligately commensal deep-sea group exclusively associated with sea anemones. Currently, only two valid species are recognized, with the genus’s species diversity and phylogenetic relationships remaining poorly understood. In this study, we systematically investigated polynoid specimens collected from four seamounts in the tropical western Pacific. Integrating morphological observations (including SEM observations of chaetal ultrastructure) and genome skimming data, we describe two new species: <i>Alentiana barnichae</i> sp. nov. and <i>A. fiegei</i> sp. nov., clarifying their morphological diagnostic characters and body size-related intraspecific variations. Phylogenetic analyses based on 13 mitochondrial protein-coding genes and four ribosomal genes revealed that <i>Alentiana</i> forms a well-supported monophyletic clade, which is sister to the deep-sea subfamily Macellicephalinae but not closely related to other genera traditionally assigned to Lepidastheniinae. Lepidastheniinae was clearly recovered as polyphyletic, and notably, it shares terminally inserted lateral antennae with Lepidonotinae without exhibiting a close phylogenetic relationship, thus challenging the reliability of traditional taxonomic characters. Ancestral state reconstruction indicated that terminally or subterminally inserted lateral antennae represent a plesiomorphy of Polynoidae, while deeply incised neuropodia are a product of convergent evolution presumably driven by ecological pressures and cannot serve as an exclusive diagnostic character for Lepidastheniinae. This study enriches the species diversity and geographical distribution records of <i>Alentiana</i>, clarifies its phylogenetic position, and provides insights for revising the taxonomic system of Polynoidae and understanding the evolution of key morphological traits.</p>","PeriodicalId":54751,"journal":{"name":"Journal of Zoological Systematics and Evolutionary Research","volume":"2026 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/jzs/1266123","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147684146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Molecular Identification of Immature Longhorn Beetles (Cerambycidae and Disteniidae) From South Korea","authors":"Seunghyun Lee,&nbsp;Sunggum Sul,&nbsp;Seunghwan Lee","doi":"10.1155/jzs/1583929","DOIUrl":"https://doi.org/10.1155/jzs/1583929","url":null,"abstract":"<p>The morphology of larval and pupal stages of longhorn beetles is of critical importance in both evolutionary and applied contexts, often providing diagnostic characters that are inaccessible in adults. Nevertheless, the systematic utility of immature-stage morphology has been limited by challenges in accurate species-level identification, largely due to insufficient comparative material and the lack of standardized identification frameworks. In this study, we analyzed a total of 1057 cytochrome oxidase I (COI) sequences, including 520 newly generated sequences (161 larvae, 109 pupae, and 250 adults) and 537 publicly available sequences retrieved from GenBank. Of the 270 preliminarily identified immature specimens, 143 (53.0%) were confirmed, 64 (23.7%) were newly identified to the species level, and 18 (6.7%) were reidentified after misidentification. The remaining 45 specimens (16.7%) remained unidentified at the species level. Based on these results, we discuss the microstructural characteristics of immature stages, present preliminary cases of morphological misidentification, and demonstrate how molecularly validated immature morphology can clarify the systematic placement of problematic taxa. The barcode data generated in this study provide a robust foundation for an integrated DNA barcode library and highlight the essential role of accurately identified immature stages in longhorn beetle systematics.</p>","PeriodicalId":54751,"journal":{"name":"Journal of Zoological Systematics and Evolutionary Research","volume":"2026 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/jzs/1583929","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147615424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ending the Decades-Long Debate: Trachinotus anak Ogilby, 1909 is the Correct Scientific Name of Golden Pompano in Chinese Aquaculture","authors":"Jiehong Wei,&nbsp;Liang Guo,&nbsp;Jing Liu,&nbsp;Laith A. Jawad,&nbsp;Nawzet Bouriga,&nbsp;Adel A. Basyouny Shahin","doi":"10.1155/jzs/2260154","DOIUrl":"https://doi.org/10.1155/jzs/2260154","url":null,"abstract":"<p>The debate over the correct scientific name of golden pompano in Chinese aquaculture, centered on the controversy between <i>Trachinotus anak</i> and <i>T. ovatus</i>, has persisted for several decades. In this study, 328 specimens of golden pompano were collected from 10 sampling sites in southern China, encompassing stocks from mariculture enterprises, local cage-culture farms, and the wild populations. The samples were identified based on morphological keys and cytochrome <i>c</i> oxidase subunit I (COI) reference sequences of important taxonomic works for <i>Trachinotus</i>. Of these, 326 individuals were morphologically identified as <i>T. anak</i>, characterized by a blade-like supraoccipital and inverted-L shape supraneurals. Only two individuals were identified as <i>T. blochii</i>, diagnosed by a tear-drop-shaped first supraneural. In phylogenetic analyses, all the analyzed <i>Trachinotus</i> sequences were clustered into 16 clades, corresponding to 16 valid species in genus <i>Trachinotus</i>. COI sequences of the 326 <i>T. anak</i> specimens were summarized into five haplotypes (Farm1–5), which form a well-supported clade with the <i>T. anak</i> reference sequences. Farm6, identified in two specimens, was resolved in the <i>T. blochii</i> clade. Additionally, we analyzed 58 COI sequences of <i>Trachinotus</i> species uploaded by Chinese researchers, whose haplotypes (Online1–9) were identified as <i>T. baillonii</i>, <i>T. blochii</i>, and <i>T. anak</i>. None of the Chinese <i>Trachinotus</i> sequences was included in the <i>T. ovatus</i> clade, suggesting that <i>T. ovatus</i>, the most commonly used name, is incorrect and should no longer be used for golden pompano in China. The holotype of <i>T. ovatus</i> was designated in 1896, which enforced the name to delegate a spotted Atlantic species. Taken together, our findings unequivocally support that the correct scientific name for golden pompano in China is <i>T. anak</i>.</p>","PeriodicalId":54751,"journal":{"name":"Journal of Zoological Systematics and Evolutionary Research","volume":"2026 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/jzs/2260154","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147565656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Drawing the Vine Line: Integrative Analyses Reveal Seven Distinct Species of African Vine Snakes, Thelotornis (Colubridae: Colubrinae)","authors":"Hanlie M. Engelbrecht,&nbsp;Kutloano L. Seeiso,&nbsp;Thomas G. Eimermacher,&nbsp;Harith Farooq,&nbsp;Michele Menegon,&nbsp;Werner A. Conradie","doi":"10.1155/jzs/3068066","DOIUrl":"10.1155/jzs/3068066","url":null,"abstract":"<p>African Vine Snakes of the genus <i>Thelotornis</i> are highly specialised arboreal colubrids distributed across sub-Saharan Africa. Despite pronounced morphological conservatism, the genus occupies diverse forest, woodland and savanna-associated habitats. The genus has long been characterised by unresolved species boundaries and taxonomic uncertainty, particularly regarding the placement of the monotypic <i>Xyelodontophis uluguruensis</i>. We investigated phylogenetic relationships and species boundaries within <i>Thelotornis</i> using an integrative framework with broad geographic and ecological sampling. Phylogenetic inference was based on two mitochondrial (cyt b and ND4) and two nuclear (c-mos and NT3) markers analysed under maximum-likelihood (IQ-TREE2) and multispecies coalescent (Species Tree And Classification Estimation, Yarely [STACEY]) frameworks. Species boundaries were further assessed using haplotype networks, mitochondrial divergence, single-locus barcoding (Assemble Species by Automatic Partitioning [ASAP]) and unsupervised machine learning (UML) clustering (super self-organising map [SuperSOM]) integrating genetic, morphological, ecological and spatial data. Seven independently evolving lineages are supported, with <i>Thelotornis</i> monophyletic only when <i>Xyelodontophis uluguruensis</i> is included. <i>Thelotornis capensis</i> subspecies are recognised as distinct species, and an undescribed lineage from Vamizi Island, Mozambique, has been identified. Emergence of the genus trace to the Mid-Miocene (<i>ca</i>. 16.6 Mya), with Late-Miocene diversification giving rise to a West–East African forest lineage (<i>T. kirtlandii</i> and <i>T. uluguruensis</i> comb. nov.) and an East–Southern African lineage comprising habitat generalists (<i>T. usambaricus</i>, <i>T</i>. sp., <i>T. mossambicanus</i> and <i>T. capensis</i>) alongside the savanna specialist <i>T. oatesi</i> stat. nov. Morphological, ecological and genetic evidence support the distinctiveness of all seven lineages, informing a revised diagnosis of <i>Thelotornis</i>. These results indicate a recent ecological radiation shaped by historical habitat dynamics, facilitating forest niche conservatism while ecological opportunity enabled savanna diversification, resolving taxonomic ambiguity and revealing hidden diversity.</p>","PeriodicalId":54751,"journal":{"name":"Journal of Zoological Systematics and Evolutionary Research","volume":"2026 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/jzs/3068066","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147562171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phylogeny and Evolution of the Genus Abax: A Genetic and Biosystematic Approach (Carabidae, Pterostichini)","authors":"Alejandro López-López,&nbsp;José Serrano,&nbsp;Giorgio Colombetta,&nbsp;Pietro Brandmayr","doi":"10.1155/jzs/5832780","DOIUrl":"https://doi.org/10.1155/jzs/5832780","url":null,"abstract":"<p>In this article, we carry out a study of the genus <i>Abax</i> (Carabidae, Pterostichini) based on mitochondrial and nuclear markers to test hypotheses about its evolutionary history in an integrative taxonomical framework. The subgenera <i>Pterostichoabax</i> (four species) and <i>Abacopercus</i> (monotypic) are likely natural taxa supported by all data. <i>Pterostichoabax</i> was nested within the species of the nominal subgenus <i>Abax</i>, which is rendered polyphyletic. The subgenus <i>Abax</i> is subdivided into a few clades that include two or more taxa and correspond to monophyletic lineages. The subdivisions within <i>Abax parallelepipedus</i> and <i>Abax pyrenaeus</i> are related to the geographical origin and may correspond to current subspecies. The results support hypotheses about a close relationship within the species of the POBE group (<i>A. pilleri</i>, <i>A. oblongus</i>, <i>A. baeninngeri</i>, and <i>A. exaratus</i>); between <i>A. carinatus</i>, <i>A. pyrenaeus</i>, and <i>A. parallelus</i>; the basal position of <i>A. schueppeli</i>; and the monophyly of <i>Pterostichoabax</i>. In contrast, hypotheses about a close relationship between the species pairs <i>schueppeli</i>-<i>carinatus</i>, <i>parallelepipedus</i>-<i>fiorii</i>, and <i>ovalis</i>-<i>parallelus</i> were not supported by molecular results. The evolutionary history of <i>Abax</i> has been traced back to the Middle Tortonian (10.3 MYA). Successive lineage splits during the second half of the Miocene gave rise to the main lineages, with rapid intraspecific radiation during the Pleistocene. Lineage diversification included moderate ecological, behavioral, and molecular changes accompanied by morphological conservatism and diversified geographical patterns. Our results constitute a framework for future studies on the evolutionary radiation of the genus <i>Abax</i> and other carabids during the Miocene in the western Palearctic and contribute to developing a natural classification of the genus.</p>","PeriodicalId":54751,"journal":{"name":"Journal of Zoological Systematics and Evolutionary Research","volume":"2026 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/jzs/5832780","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147569747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Review of the Widespread Indo-West Pacific Ghost Crab, Ocypode ceratophthalmus (Pallas, 1772) (Crustacea: Decapoda: Ocypodidae) Complex, With the Description of a New Species","authors":"Peter J. F. Davie,&nbsp;Peter K. L. Ng,&nbsp;Hsi-Te Shih","doi":"10.1155/jzs/8882236","DOIUrl":"https://doi.org/10.1155/jzs/8882236","url":null,"abstract":"<p>The widespread Indo-West Pacific ghost crab, <i>Ocypode ceratophthalmus</i> (Pallas, 1772) is found to be a species-complex containing three distinct species. An Indian Ocean form, <i>O. celadon</i> sp. nov. occurs along the shores of East Africa, thence becoming an insular species spreading eastwards as far as Christmas Island. A central Indo-West Pacific species, <i>O. ceratophthalmus</i> is found from about Pakistan eastwards to Fiji, north to the southern part of the main islands of Japan and south down the coasts of Australia, and is the dominant species along the continental beaches throughout the region. <i>O. urvillii</i> Guérin, 1829, is newly raised from synonymy for an insular Pacific Ocean form that extends from Hawai’i and Clipperton Island in the central East Pacific, westwards into the northeastern Indian Ocean as far the Cocos (Keeling) Islands. A mitochondrial genetic study from cytochrome c oxidase subunit 1 (COI) supports the recognition of these three species. Each species can be relatively easily separated by claw characters, including the stridulatory crests on the major chela, the form of the male first gonopods (G1), the live colours and patterns, and other characters related to granulation and spination.</p>","PeriodicalId":54751,"journal":{"name":"Journal of Zoological Systematics and Evolutionary Research","volume":"2026 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/jzs/8882236","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147568689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cold Seep Communities in the Sea of Japan Are Species-Poor and Dominated by a New Species of Provannid Snail","authors":"Chong Chen,&nbsp;Hiromi Kayama Watanabe,&nbsp;Shinsuke Kawagucci","doi":"10.1155/jzs/4623950","DOIUrl":"https://doi.org/10.1155/jzs/4623950","url":null,"abstract":"<p>The Sea of Japan is a semi-enclosed marginal sea in the northwestern Pacific whose bathyal communities exhibit a depauperate species diversity due to anoxic events during the last glacial maximum. Cold seeps associated with chemosynthetic ecosystems were discovered in this region over three decades ago, yet their fauna have not been characterised. Here, we surveyed three bathyal seeps in the northeastern Sea of Japan off Okushiri Island, Hokkaido, to reveal their faunal composition and environmental conditions. We documented only eight macrofaunal species across all sites, of which six are well-known ambient fauna, with just two gastropod species in the genera <i>Provanna</i> and <i>Hyalogyrina</i> being seep endemics. Dissolved oxygen (DO) concentrations were consistently reduced on the seep bacterial mats, while the temperature remained similar to the ambient seawater. The <i>Provanna</i> species was new to science and is named <i>P. cocytus</i> sp. nov., characterised by a smooth shell with very convex whorls and a nearly holostomous aperture and a radula with a truncated central tooth cusp and the lateral teeth lacking a buttress. Phylogenetic reconstruction using the mitochondrial cytochrome c subunit I (COI) gene recovered <i>P. cocytus</i> sp. nov. as sister to all other congeners, indicating this genus did not recolonise the Sea of Japan after the last glacial maximum from seep or vent sources. The low species richness at seeps likely represents a combined effect of shallow connections limiting dispersal and impacts of the very cold Japan Sea Proper Water to larval settlement. Our results contribute to the understanding of the biodiversity in the Sea of Japan and close a major knowledge gap in the biogeography of chemosynthesis-based ecosystems across the western Pacific.</p>","PeriodicalId":54751,"journal":{"name":"Journal of Zoological Systematics and Evolutionary Research","volume":"2026 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/jzs/4623950","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147568829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}