Systematics and Biodiversity最新文献

{"title":"Ancestral state reconstruction reveals extensive homoplasy in nutlet characters of Cynoglossinae (Boraginaceae, subfam. Cynoglossoideae, tribe Cynoglosseae)","authors":"Zohreh Pourghorban, Yasaman Salmaki, Maximilian Weigend","doi":"10.1080/14772000.2023.2272835","DOIUrl":"https://doi.org/10.1080/14772000.2023.2272835","url":null,"abstract":"Recent phylogenetic studies have challenged the traditional classification of the subtribe Cynoglossinae, which was based on nutlet characteristics. To investigate the evolution of fruit traits rel...","PeriodicalId":54437,"journal":{"name":"Systematics and Biodiversity","volume":"2 18","pages":""},"PeriodicalIF":1.9,"publicationDate":"2023-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138495809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Taxonomic and phylogenetic studies on two marine Cyrtophoria ciliates (Protista: Ciliophora: Phyllopharyngea) with the description of a new species","authors":"Congcong Wang, Limin Jiang, Lijian Liao, Zhishuai Qu, Santosh Kumar, Xiaozhong Hu","doi":"10.1080/14772000.2023.2269150","DOIUrl":"https://doi.org/10.1080/14772000.2023.2269150","url":null,"abstract":"AbstractThe subclass Cyrtophoria is a group of morphologically specialized ciliates with diverse characteristics, which can be found in a variety of aquatic and terrestrial habitats. In the present study, two cyrtophorian ciliates, Aegyria oliva Claparède & Lachmann, Citation1859 and A. peculiaris sp. nov., isolated from coastal waters of China, were investigated based on microscopic observations of live and protargol-stained specimens, and SSU rRNA gene sequence analyses. For A. oliva, the type species of the genus, detailed morphometric data, and improved diagnosis are provided. The new species, Aegyria peculiaris sp. nov. is characterized by a body size of 70–115 × 30–65 μm in vivo, an inverted oval body shape with a protrusion at the anterior left and a posterior bulge on the dorsal side, 45–58 somatic kineties, 31–46 nematodesmal rods, 4–6 transpodial segments, and about six contractile vacuoles. Phylogenetic analyses unveiled a close relationship between the newly identified species and A. foissneri, thereby confirming the monophyly of the genus Aegyria. http://zoobank.org/urn:lsid:zoobank.org:pub:F5566374-DA6C-4E95-B8DA-19F935D949C8Key words: Aegyria peculiarisciliary patternciliatediversityperiphytonphylogenySSU rRNA gene Disclosure statementNo potential conflict of interest was reported by the author(s).Supplemental materialSupplemental material for this article can be accessed here: https://doi.org/10.1080/14772000.2023.2269150.Associate Editor: Dr David WilliamsAdditional informationFundingThis work was supported by the National Natural Science Foundation of China [project number: 42276094].","PeriodicalId":54437,"journal":{"name":"Systematics and Biodiversity","volume":"38 20","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135820032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Discovery of a new species of dwarf frog (Anura: Ceratobatrachidae: <i>Alcalus</i> ) extends the northwestern distributional limits of the genus to Northeast India","authors":"Bitupan Boruah, Surya Narayanan, Jason D. Gerard, Abhijit Das, V. Deepak","doi":"10.1080/14772000.2023.2249891","DOIUrl":"https://doi.org/10.1080/14772000.2023.2249891","url":null,"abstract":"AbstractWe describe a new species of the genus Alcalus from the northeast Indian state of Arunachal Pradesh based on molecular, morphological, and osteological characters. The new species differs from its congeners based on a combination of morphological characters including snout-vent length (27–28 mm in males; 29.9–36.2 mm in females), disc on fingers and toes with horizontal/transverse groove on the dorsal surface, dorsal skin wrinkled, and a pair of faint dorsolateral stripes on back. The new species also differs from its congeners by a DNA sequence divergence of 7.6–25.4% in the mitochondrial gene fragment 12S–tVal–16S rRNA (1533 base pairs). We include a detailed osteological description of the new species and compare it with the type of this genus. This is the first record of this genus from India, which was recently also reported from Myanmar and Western China. Discovery of a new species from northeast India indicates the need for a systematic study to uncover the hidden diversity of the Indo-Burma biodiversity hotspot. http://zoobank.org/urn:lsid:zoobank.org:pub:FB75F850-2AD9-4643-97CE-7F3F1D58E3F8 http://zoobank.org/urn:lsid:zoobank.org:act:6104F7A5-7E5E-42A7-90A1-810C394CFB3EKey words: Arunachal PradeshIndo-Burma biodiversity hotspotNamdapha Tiger Reserveosteologyphylogeny AcknowledgementsWe are very thankful to Arunachal Pradesh Forest Department for the research permit (CWL/GEN/355/2021/3178 dated 28 September 2021). Thanks are also due to Aduk Paron (Field Director), Tajum Yomcha (Research officer), Mayur Variya (Biologist), and all the forest staff of Namdapha Tiger Reserve for logistical support. We would like to thank the Director and Dean, Wildlife Institute of India, Dehradun for their constant support. We thank Naitik G. Patel, Vijayan Jithin, Santanu Dey, Rajiv N.V., and Aphu Yoha Yobin for their help during fieldwork. We thank Patrick Campbell, David Gower, and Jeff Streicher at NHM, London for their support. Surya thanks N.A. Aravind for his support at ATREE, Bengaluru. We thank Chinta S. for the help in editing and correcting the language in the manuscript. We thank two anonymous reviewers and the editor for their critical comments on the earlier drafts of this manuscript.Disclosure statementNo potential conflict of interest was reported by the author(s).Supplemental materialSupplemental material for this article can be accessed here: https://dx.doi.org/10.1080/14772000.2023.2249891.Associate Editor: Dr Susan TsangAdditional informationFundingWe thank the National Geographic Society for National Geographic Explorer Grant [NGS-74044R-20) and SERB-DST [CRG/2018/000790] for financial support.","PeriodicalId":54437,"journal":{"name":"Systematics and Biodiversity","volume":"46 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135367333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unveiling hidden diversity of <i>Oecomys</i> (Rodentia: Cricetidae) from Brazilian Central Amazonia: description of a new species and new lineages","authors":"Juliane Saldanha, Thiago Borges Fernandes Semedo, Ravena Fernanda Braga de Mendonça, Luan Gabriel Lima-Silva, Mariluce Rezende Messias, Iracilda Sampaio, Marcus Vinicius Brandão, Rogério Vieira Rossi","doi":"10.1080/14772000.2023.2259037","DOIUrl":"https://doi.org/10.1080/14772000.2023.2259037","url":null,"abstract":"The arboreal rice rat of the genus Oecomys Thomas, 1906 is one of the most speciose genera of the subfamily Sigmodontinae, with 19 species currently recognized and occurring from eastern Panama to northern Argentina, Paraguay, and in northern, central and eastern Brazil. Herein we describe a new species using an integrative approach based on molecular, morphological, and morphometric data. We used in our assessment recently collected specimens from the states of Pará and Rondônia, one of the most deforested regions in Brazil. We examined 51 specimens of Oecomys from museum collections including name-bearing types from most of the distributional range of the genus. We also sequenced 32 specimens of Oecomys, and for the molecular analyses, we used the mitochondrial marker Cytochrome b and the nuclear marker intron 7 of β-fibrinogen. Our mitochondrial marker results recovered a strongly supported clade composed of two divergent clades (3.78%), one including lineages of O. bicolor and O. cleberi, and the other clade representing the new species. The topology of concatenated mitochondrial and nuclear data also recovered Oecomys sp. nov. as a sister lineage of the O. bicolor and O. cleberi clade. Also, both markers recovered new lineages from the O. bicolor and O. cleberi species group. The new species can be discriminated from other Oecomys species by pelage colour and craniodental characters, such as absent or small mastoid fenestra, and the presence of alisphenoid strut, small subsquamosal fenestra, presence of sphenopalatine vacuities, and presence of accessory loph of M1 and M2 paracones. The new species occurs exclusively in the Rondônia centre of endemism, delimited by the rivers Amazon to the north, Tapajós to the east, and Madeira to the west. The description of this new Oecomys increases the diversity, and also contributes to elevate Amazonian Sigmodontinae species richness and endemism in this still poorly known biome.","PeriodicalId":54437,"journal":{"name":"Systematics and Biodiversity","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135968010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Revision of the Indo-West Pacific crab genus <i>Soliella</i> (Brachyura: Xanthidae: Etisinae): ‘pseudocryptic species’ and basinal speciation","authors":"Robert M. Lasley, Jose Christopher E. Mendoza, Gustav Paulay","doi":"10.1080/14772000.2023.2249896","DOIUrl":"https://doi.org/10.1080/14772000.2023.2249896","url":null,"abstract":"Etisine crabs are some of the most abundant cryptobionts in Indo-West Pacific coral reef systems. Despite their ecological importance and abundance in museum collections, several recent systematic studies have indicated family- to subspecies-level taxonomic problems. One such case involves the former chlorodielline genus Soliella Lasley, Klaus & Ng, Citation2015 (treated here as part of Etisinae), which currently comprises two valid species and three available names that have been in flux in recent literature. The validity of these taxa has only been cursorily discussed. To resolve species limits and distributions, a thorough morphological examination of hundreds of specimens was conducted, including scanning electron microscopy of male gonopods, along with analysis of sequence data of the mitochondrial marker cytochrome c oxidase subunit I (COI) from 84 exemplars across the distribution of the genus. The status of two species that have Indian Ocean versus Pacific Ocean distributions with overlap in the Indo-Australian Archipelago and adjacent regions is confirmed. While external morphology is not reliable for identification, a few discrete, although slight, differences in gonopod morphology were found, and these results are consistent with a ‘pseudocryptic species’ designation. Speciation conforms to a previously published etisine model of allopatric differentiation followed by subsequent divergence of gonopod morphology upon secondary sympatry. This pattern, the biogeography of the two species and the concept of ‘pseudocryptic species’ are discussed.","PeriodicalId":54437,"journal":{"name":"Systematics and Biodiversity","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135386939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Return of the prodigal son: morphology and molecular phylogenetic relationships of a new Antarctic fish leech (Hirudinea: Piscicolidae) imply a bipolar biogeographic pattern","authors":"Andriy Utevsky, Serge Utevsky, Joanna M. Cichocka, Aleksander Bielecki, Mario Santoro, Peter Trontelj","doi":"10.1080/14772000.2023.2246476","DOIUrl":"https://doi.org/10.1080/14772000.2023.2246476","url":null,"abstract":"The bipolar distribution of fish leeches (Piscicolidae) has been considered and discussed by leech biologists for a long time. All cases of putative bipolar ranges of related taxa that occur in cold and temperate waters of both hemispheres and are absent in the tropics have been morphology-based hypotheses. Here, we present, for the first time, an instance of bipolar distribution substantiated by morphological and molecular data. The latter include the mitochondrial genes 12S rRNA, COI, ND1 and tRNA Leu, and the nuclear 28S rRNA. A new genus and species of Antarctic piscicolids, Austroplatybdellina prodiga, is described. The new leech was part of a Boreal-Arctic monophyletic group that is informally called ‘classic platybdellins’. That clade is the core of the non-monophyletic subfamily Platybdellinae. Austroplatybdellina prodiga gen. nov. sp. nov. was further classified as a member of a monophyletic group along with two Boreal genera, Crangonobdella and Beringobdella, which share a number of systematically important morphological features with its newly described relative. It is hypothesized that the Boreal ancestor of the new leech crossed warm tropical waters and colonized the Antarctic. The colonization was relatively recent as the low genetic distance between A. prodiga and its Boreal sister species suggests. This migration can be viewed as a return of a Boreal descendant of the Antarctic ancestor of Piscicolidae to the area of origin of the entire family, which follows from the basal position of the Antarctic Megaliobdella szidati in the family phylogenetic tree. This evolutionary scenario is reflected in the species epithet of the new leech.https://zoobank.org/urn:lsid:zoobank.org:pub:DA548F19-922A-4B5D-B7F1-4C3AF57B9824https://zoobank.org/urn:lsid:zoobank.org:act:A35C365A-A475-4F3E-B28B-C799F618215Dhttps://zoobank.org/urn:lsid:zoobank.org:act:BCE6411F-E38A-4A99-A726-DE5C33D9D658","PeriodicalId":54437,"journal":{"name":"Systematics and Biodiversity","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135980660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unity in diversity: morphological and genetic variability, integrative systematics, and phylogeography of the widespread nudibranch mollusc <i>Onchidoris muricata</i>","authors":"Irina A. Ekimova, Ekaterina Nikitenko, Maria V. Stanovova, Dimitry M. Schepetov, Tatiana I. Antokhina, Manuel AntÓnio E. Malaquias, ÁNgel ValdÉs","doi":"10.1080/14772000.2023.2246472","DOIUrl":"https://doi.org/10.1080/14772000.2023.2246472","url":null,"abstract":"AbstractOnchidoris muricata (Gastropoda: Nudibranchia: Onchidorididae) is a well-known nudibranch species, which has a wide amphiboreal range confirmed by molecular data. However, O. muricata shows a high degree of variation in external morphology among distant populations, which may indicate the presence of cryptic diversity within this species. There are also two closely related species with an unconfirmed taxonomic status, which were recently described from the northwestern Pacific based on morphological data. In this paper we study the taxonomic status and population structure of O. muricata based on an integrative approach combining morphological and molecular data and using O. muricata as a model we explore issues of boreal marine fauna connectivity and glaciation-driven isolation. The external morphology, spicule composition, and features of the buccal armature and the reproductive system were studied using light microscopy, scanning electron microscopy and mCT scan technology. The molecular study included various population genetic analyses as well as divergence time estimation and ancestral area reconstruction analyses. Onchidoris muricata represents a true amphiboreal species, which shows a high degree of heterogeneity in morphological characters, especially in the radular morphology and in features of the reproductive system. Our new data question the validity of the North-West Pacific species O. macropompa and O. pavli as the morphology of both these species fall within the phenotypic diversity of O. muricata. Although our sampling does not include the type localities of these two species, the observed morphological variability in O. muricata and the lack of molecular data for the North Pacific species O. macropompa and O. pavli suggest the latter two species are in fact part of O. muricata morphological diversity. Phylogeographic analyses indicate a genetic separation of the North Pacific and North Atlantic-Arctic populations of O. muricata, suggesting restricted gene flow between these areas. We show that this divergence may be a result of glacial cycles during the late Pleistocene, which were a key factor in the reduction of gene flow across the Arctic Ocean. Our molecular results also suggest that the White Sea population experienced a bottleneck event during the last Glacial Maximum.Key words: ArcticMolluscaNorth-West Pacificradulaspecies conceptspecies delimitationspicule complex AcknowledgmentsWe are deeply grateful to all friends and colleagues who kindly collected and supplied specimens for this study: WSBS Dive Team, especially A.A. Semenov and A. Mikhlina; Yu.V. Deart, Egersund Dive Team 2019, Tine Kinn Kvamme, Nils Aukan, Erling Svensen, Anders Schouw, Ole Meldahl and Justine Sigwald. We want to express our special gratitude to Andrey Shpatak, who kindly hosted us during numerous field trips to the Sea of Japan and supplied diving facilities, and also shared with us his beautiful photos and extensive observations on nudibr","PeriodicalId":54437,"journal":{"name":"Systematics and Biodiversity","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135520472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"More geckos, fewer gaps: diversity and distribution of Hemidactylus geckos (Squamata: Gekkonidae) in Jordan","authors":"Lukáš Pola, Doubravka Velenská, Kseniia Marianna Prondzynska, Vojtěch Hejduk, Aleš Zíka, Tomáš Winkelhöfer, M. A. Baker, Z. Amr, J. Šmíd","doi":"10.1080/14772000.2023.2237033","DOIUrl":"https://doi.org/10.1080/14772000.2023.2237033","url":null,"abstract":"","PeriodicalId":54437,"journal":{"name":"Systematics and Biodiversity","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2023-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47408802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Morphological and molecular analysis of Ephydatia fluviatilis (Porifera: Spongillida: Spongillidae) from Nanjing, China","authors":"Zhenag Zhao, Chun-xiang Li, Xianqin Yan, Qun Yang, Junye Ma","doi":"10.1080/14772000.2023.2228865","DOIUrl":"https://doi.org/10.1080/14772000.2023.2228865","url":null,"abstract":"","PeriodicalId":54437,"journal":{"name":"Systematics and Biodiversity","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2023-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42494344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Two new species of Atopobathynella (Parabathynellidae, Bathynellacea) from the Pilbara region, Australia","authors":"G. Perina, A. Camacho, M. Danks, N. White, M. Guzik","doi":"10.1080/14772000.2023.2228326","DOIUrl":"https://doi.org/10.1080/14772000.2023.2228326","url":null,"abstract":"","PeriodicalId":54437,"journal":{"name":"Systematics and Biodiversity","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2023-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44109815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}