Pub Date : 2023-01-01DOI: 10.1080/14772019.2023.2205433
Thomas J. Raven, P. Barrett, C. Joyce, S. Maidment
{"title":"The phylogenetic relationships and evolutionary history of the armoured dinosaurs (Ornithischia: Thyreophora)","authors":"Thomas J. Raven, P. Barrett, C. Joyce, S. Maidment","doi":"10.1080/14772019.2023.2205433","DOIUrl":"https://doi.org/10.1080/14772019.2023.2205433","url":null,"abstract":"","PeriodicalId":50028,"journal":{"name":"Journal of Systematic Palaeontology","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42506807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1080/14772019.2023.2244495
Yi Gao, Ai Song, Wei-Yu-Dong Deng, Lin-Lin Chen, Jia Liu, Wei-Cheng Li, Gaurav Srivastava, Robert A. Spicer, Zhe-Kun Zhou, Tao Su
AbstractBauhinia s.s. is a large genus in the family Fabaceae, but its evolutionary and biogeographical history is still unclear due to the scarcity of fossil records compared to the highly diverse modern species in pantropic regions. Here, we report the earliest fossil record of Bauhinia s.s., namely Bauhinia tibetensis Y. Gao et T. Su sp. nov., based on leaves from the latest Paleocene of the southern Tibetan region. Combined with palaeoecological niche simulations and ancestral state reconstruction, the new fossils suggested a Paleocene origin of Bauhinia s.s. in the Afrotropical realm that subsequently dispersed to the Neotropical and Indomalayan realms. Bauhinia tibetensis belongs to the Asian clade of Bauhinia s.s. that reached the southern Tibetan region from the Afrotropical realm via the Kohistan-Ladakh Island Arc in the early Paleocene. This clade spread to south-eastern China during the Oligocene and entered northern India during the Neogene or earlier. The discovery of the oldest Bauhinia s.s. from what is now the southern Tibetan Plateau updates our understanding of the biogeographical history of this genus and demonstrates that the Kohistan-Ladakh Island Arc is an ancient corridor for floristic interchange between Africa and India.Keywords: Bauhinia s.s.biogeographydiversificationPaleoceneleaf fossilpalaeoecological niche simulations AcknowledgementsWe thank the members of the Paleoecology Research Group from Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences (CAS) and colleagues from Kunming Institute of Botany, CAS for fossil collection works. We thank the Institutional Center for Shared Technologies and Facilities of Xishuangbanna Tropical Botanical Garden, CAS for providing imaging equipment and assisting with fossil scans. This work is supported by the National Key Research and Development Program (2022YFF0800800), the Second Tibetan Plateau Scientific Expedition program (2019QZKK0705), the National Natural Science Foundation of China (NSFC) (41988101), the Strategic Priority Research Program of the Chinese Academy of Sciences (CAS) (XDB26000000), the Youth Innovation Promotion Association, CAS (Y2021105), and the Basic Research Project in Yunnan (YNWR-QNBJ-2019-086).Disclosure statementNo potential conflict of interest was reported by the author(s).Supplemental materialSupplemental material for this article can be accessed here: http://dx.doi.org/10.1080/14772019.2023.2244495.Associate Editor: Paul Kenrick
摘要紫荆属(bauhinia s.s.)是豆科植物中的一个大属，但由于化石记录的缺乏，其进化和生物地理历史与泛热带地区高度多样化的现代物种相比仍不清楚。本文报道了紫荆花属植物最早的化石记录，即紫荆花西藏(Bauhinia tibetensis Y. Gao et T. Su sp. nov.)，基于藏南地区古新世晚期的叶片。结合古生态位模拟和祖先状态重建，这些新化石表明紫荆属起源于古新世的非洲热带地区，随后分散到新热带和印多马拉亚地区。西藏紫荆花属紫荆花属亚洲分支，在古新世早期从非洲热带地区经科希斯坦-拉达克岛弧到达西藏南部地区。这个分支在渐新世传播到中国东南部，在新近纪或更早时期进入印度北部。在青藏高原南部发现的最古老的紫荆属植物更新了我们对该属生物地理历史的认识，并证明了科希斯坦-拉达克岛弧是非洲和印度植物区系交流的古老走廊。感谢中国科学院西双版纳热带植物园古生态课题组成员和中国科学院昆明植物研究所的同事们所做的化石收集工作。感谢中国科学院西双版纳热带植物园技术设施共享中心提供成像设备和协助化石扫描。国家重点研发计划项目(2022YFF0800800)、青藏高原第二次科学考察计划项目(2019QZKK0705)、国家自然科学基金(41988101)、中国科学院战略重点研究计划项目(XDB26000000)、中国科学院青年创新促进会项目(Y2021105)、云南省基础研究项目(YNWR-QNBJ-2019-086)资助。披露声明作者未报告潜在的利益冲突。补充材料本文的补充材料可以在这里访问:http://dx.doi.org/10.1080/14772019.2023.2244495.Associate编辑:Paul Kenrick
{"title":"The oldest fossil record of <i>Bauhinia</i> s.s. (Fabaceae) from the Tibetan Plateau sheds light on its evolutionary and biogeographic implications","authors":"Yi Gao, Ai Song, Wei-Yu-Dong Deng, Lin-Lin Chen, Jia Liu, Wei-Cheng Li, Gaurav Srivastava, Robert A. Spicer, Zhe-Kun Zhou, Tao Su","doi":"10.1080/14772019.2023.2244495","DOIUrl":"https://doi.org/10.1080/14772019.2023.2244495","url":null,"abstract":"AbstractBauhinia s.s. is a large genus in the family Fabaceae, but its evolutionary and biogeographical history is still unclear due to the scarcity of fossil records compared to the highly diverse modern species in pantropic regions. Here, we report the earliest fossil record of Bauhinia s.s., namely Bauhinia tibetensis Y. Gao et T. Su sp. nov., based on leaves from the latest Paleocene of the southern Tibetan region. Combined with palaeoecological niche simulations and ancestral state reconstruction, the new fossils suggested a Paleocene origin of Bauhinia s.s. in the Afrotropical realm that subsequently dispersed to the Neotropical and Indomalayan realms. Bauhinia tibetensis belongs to the Asian clade of Bauhinia s.s. that reached the southern Tibetan region from the Afrotropical realm via the Kohistan-Ladakh Island Arc in the early Paleocene. This clade spread to south-eastern China during the Oligocene and entered northern India during the Neogene or earlier. The discovery of the oldest Bauhinia s.s. from what is now the southern Tibetan Plateau updates our understanding of the biogeographical history of this genus and demonstrates that the Kohistan-Ladakh Island Arc is an ancient corridor for floristic interchange between Africa and India.Keywords: Bauhinia s.s.biogeographydiversificationPaleoceneleaf fossilpalaeoecological niche simulations AcknowledgementsWe thank the members of the Paleoecology Research Group from Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences (CAS) and colleagues from Kunming Institute of Botany, CAS for fossil collection works. We thank the Institutional Center for Shared Technologies and Facilities of Xishuangbanna Tropical Botanical Garden, CAS for providing imaging equipment and assisting with fossil scans. This work is supported by the National Key Research and Development Program (2022YFF0800800), the Second Tibetan Plateau Scientific Expedition program (2019QZKK0705), the National Natural Science Foundation of China (NSFC) (41988101), the Strategic Priority Research Program of the Chinese Academy of Sciences (CAS) (XDB26000000), the Youth Innovation Promotion Association, CAS (Y2021105), and the Basic Research Project in Yunnan (YNWR-QNBJ-2019-086).Disclosure statementNo potential conflict of interest was reported by the author(s).Supplemental materialSupplemental material for this article can be accessed here: http://dx.doi.org/10.1080/14772019.2023.2244495.Associate Editor: Paul Kenrick","PeriodicalId":50028,"journal":{"name":"Journal of Systematic Palaeontology","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136374737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1080/14772019.2023.2267553
Abhay Rautela, Sunil Bajpai
AbstractDiacodexeids are widely considered to be a paraphyletic group consisting of the oldest and most primitive artiodactyls that made their sudden appearance in all northern continents around the Palaeocene–Eocene boundary. In South Asia, the first record of artiodactyls is marked by the appearance of Gujaratia indica from the early Ypresian (∼55 Ma) Cambay Shale of the Vastan lignite mine, India, which is slightly younger than the oldest artiodactyls from Europe and North America. Here we describe new dental material of G. indica, documenting associated upper dentition, including P4, a new locus. Gujaratia (including G. pakistanensis and G. indica) is clearly distinct from all known diacodexeids in having the most triangular upper molars and lower molars with weaker paraconids. Cladistic analysis performed to assess the phylogenetic relationships of Gujaratia with other diacodexeids, dichobunoids, raoellids and pakicetids shows that Gujaratia is monophyletic while Diacodexis and Diacodexeidae are strongly polyphyletic. Gujaratia is found to be closer to the North American diacodexeids and D. gigasei and D. morrisi from Europe, which form a paraphyletic group. The European Diacodexis represents an unnatural grouping with D. antunesi being most closely related to a clade comprising dichobunids and homacodontids, and D. gazini and D. varleti occupying basal positions in a clade comprising raoellids and pakicetids. Dichobunidae is also recovered as a polyphyletic group whereas Homacodontidae is paraphyletic. Raoellids and pakicetids, long considered to be endemic to the Indian subcontinent, are monophyletic and without close affinities to Gujaratia, and appear to be more closely allied to some European dichobunoids, e.g., D. gazini, necessitating a reappraisal of current ideas about artiodactyl origins.Keywords: EoceneGujaratiaphylogenyDiacodexeidaeIndian subcontinent AcknowledgementsWe thank the two anonymous reviewers and the editors for their constructive comments which helped improve the manuscript. We thank D. Datta for helpful comments on phylogeny. We are grateful to D. Das, V. V. Kapur, N. Saravanan and R. Sharma for assistance during the fieldwork, and the officials and staff of GIPCL for permission to work and for logistic support in the Vastan lignite mine. We also thank A. Juyal for taking SEM images at the Dept. of Earth Sciences, IIT Roorkee. AR acknowledges financial support provided under the Shyama Prasad Mukherjee Fellowship, CSIR, New Delhi, Government of India (SPM09/0143(16119)/2022-EMR-I). SB acknowledges support obtained from DST, Government of India (SR/S4/ES-222/2006) and the IITR Institute Chair Professorship.Disclosure statementThe authors report there are no competing interests to declare.Supplemental materialSupplemental material for this article can be accessed here: http://dx.doi.org/10.1080/14772019.2023.2267553.Associate Editor: Alistair EvansAdditional informationFundingWe thank the two anonymous reviewers and th
{"title":"<i>Gujaratia indica</i> , the oldest artiodactyl (Mammalia) from South Asia: new dental material and phylogenetic relationships","authors":"Abhay Rautela, Sunil Bajpai","doi":"10.1080/14772019.2023.2267553","DOIUrl":"https://doi.org/10.1080/14772019.2023.2267553","url":null,"abstract":"AbstractDiacodexeids are widely considered to be a paraphyletic group consisting of the oldest and most primitive artiodactyls that made their sudden appearance in all northern continents around the Palaeocene–Eocene boundary. In South Asia, the first record of artiodactyls is marked by the appearance of Gujaratia indica from the early Ypresian (∼55 Ma) Cambay Shale of the Vastan lignite mine, India, which is slightly younger than the oldest artiodactyls from Europe and North America. Here we describe new dental material of G. indica, documenting associated upper dentition, including P4, a new locus. Gujaratia (including G. pakistanensis and G. indica) is clearly distinct from all known diacodexeids in having the most triangular upper molars and lower molars with weaker paraconids. Cladistic analysis performed to assess the phylogenetic relationships of Gujaratia with other diacodexeids, dichobunoids, raoellids and pakicetids shows that Gujaratia is monophyletic while Diacodexis and Diacodexeidae are strongly polyphyletic. Gujaratia is found to be closer to the North American diacodexeids and D. gigasei and D. morrisi from Europe, which form a paraphyletic group. The European Diacodexis represents an unnatural grouping with D. antunesi being most closely related to a clade comprising dichobunids and homacodontids, and D. gazini and D. varleti occupying basal positions in a clade comprising raoellids and pakicetids. Dichobunidae is also recovered as a polyphyletic group whereas Homacodontidae is paraphyletic. Raoellids and pakicetids, long considered to be endemic to the Indian subcontinent, are monophyletic and without close affinities to Gujaratia, and appear to be more closely allied to some European dichobunoids, e.g., D. gazini, necessitating a reappraisal of current ideas about artiodactyl origins.Keywords: EoceneGujaratiaphylogenyDiacodexeidaeIndian subcontinent AcknowledgementsWe thank the two anonymous reviewers and the editors for their constructive comments which helped improve the manuscript. We thank D. Datta for helpful comments on phylogeny. We are grateful to D. Das, V. V. Kapur, N. Saravanan and R. Sharma for assistance during the fieldwork, and the officials and staff of GIPCL for permission to work and for logistic support in the Vastan lignite mine. We also thank A. Juyal for taking SEM images at the Dept. of Earth Sciences, IIT Roorkee. AR acknowledges financial support provided under the Shyama Prasad Mukherjee Fellowship, CSIR, New Delhi, Government of India (SPM09/0143(16119)/2022-EMR-I). SB acknowledges support obtained from DST, Government of India (SR/S4/ES-222/2006) and the IITR Institute Chair Professorship.Disclosure statementThe authors report there are no competing interests to declare.Supplemental materialSupplemental material for this article can be accessed here: http://dx.doi.org/10.1080/14772019.2023.2267553.Associate Editor: Alistair EvansAdditional informationFundingWe thank the two anonymous reviewers and th","PeriodicalId":50028,"journal":{"name":"Journal of Systematic Palaeontology","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135446167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1080/14772019.2023.2210577
Stuart Pond, Sarah-Jane Strachan, Thomas J. Raven, M. Simpson, Kirsty Morgan, S. Maidment
{"title":"Vectipelta barretti, a new ankylosaurian dinosaur from the Lower Cretaceous Wessex Formation of the Isle of Wight, UK","authors":"Stuart Pond, Sarah-Jane Strachan, Thomas J. Raven, M. Simpson, Kirsty Morgan, S. Maidment","doi":"10.1080/14772019.2023.2210577","DOIUrl":"https://doi.org/10.1080/14772019.2023.2210577","url":null,"abstract":"","PeriodicalId":50028,"journal":{"name":"Journal of Systematic Palaeontology","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44484719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1080/14772019.2023.2214565
Agostina Ferro, D. Garcia-Lopez, Luis S. Saade, Pablo J. Alonso-Muruaga, A. Scanferla
{"title":"A new ‘archaeohyracid’ (Notoungulata, Typotheria) from the Eocene of north-western Argentina: anatomy, phylogenetic relationships and evolutionary implications","authors":"Agostina Ferro, D. Garcia-Lopez, Luis S. Saade, Pablo J. Alonso-Muruaga, A. Scanferla","doi":"10.1080/14772019.2023.2214565","DOIUrl":"https://doi.org/10.1080/14772019.2023.2214565","url":null,"abstract":"","PeriodicalId":50028,"journal":{"name":"Journal of Systematic Palaeontology","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44317670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1080/14772019.2023.2217505
Tobias Massonne, Felix J. Augustin, Andreas T. Matzke, M. Böhme
{"title":"A new cryptodire from the Eocene of the Na Duong Basin (northern Vietnam) sheds new light on Pan-Trionychidae from Southeast Asia","authors":"Tobias Massonne, Felix J. Augustin, Andreas T. Matzke, M. Böhme","doi":"10.1080/14772019.2023.2217505","DOIUrl":"https://doi.org/10.1080/14772019.2023.2217505","url":null,"abstract":"","PeriodicalId":50028,"journal":{"name":"Journal of Systematic Palaeontology","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49365471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1080/14772019.2022.2158762
A. Nel, JEAN-PAUL Kundura, J. Pouillon, R. Garrouste, C. Jouault
{"title":"A new Caloneurodea family (Insecta, Archaeorthoptera) increases the insect palaeodiversity of the middle Permian Salagou Formation (southern France)","authors":"A. Nel, JEAN-PAUL Kundura, J. Pouillon, R. Garrouste, C. Jouault","doi":"10.1080/14772019.2022.2158762","DOIUrl":"https://doi.org/10.1080/14772019.2022.2158762","url":null,"abstract":"","PeriodicalId":50028,"journal":{"name":"Journal of Systematic Palaeontology","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42605025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1080/14772019.2023.2183146
Jing Zhang, Liping Dong, Baoxia Du, Ai‐Jing Li, Xiang Lei, Mingzhen Zhang, Sen Wang, Guorong Ma, Jianguo Hui
{"title":"First fossil evidence for a new frog from the Early Cretaceous of the Jiuquan Basin, Gansu Province, north-western China","authors":"Jing Zhang, Liping Dong, Baoxia Du, Ai‐Jing Li, Xiang Lei, Mingzhen Zhang, Sen Wang, Guorong Ma, Jianguo Hui","doi":"10.1080/14772019.2023.2183146","DOIUrl":"https://doi.org/10.1080/14772019.2023.2183146","url":null,"abstract":"","PeriodicalId":50028,"journal":{"name":"Journal of Systematic Palaeontology","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44116313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1080/14772019.2023.2250117
Luca Pandolfi, Leonardo Sorbelli, Oriol Oms, Pablo Rodriguez-Salgado, Gerard Campeny, Bruno Gómez de Soler, Federica Grandi, Jordi Agustí, Joan Madurell-Malapeira
{"title":"The <i>Tapirus</i> from Camp dels Ninots (NE Iberia): implications for morphology, morphometry and phylogeny of Neogene Tapiridae","authors":"Luca Pandolfi, Leonardo Sorbelli, Oriol Oms, Pablo Rodriguez-Salgado, Gerard Campeny, Bruno Gómez de Soler, Federica Grandi, Jordi Agustí, Joan Madurell-Malapeira","doi":"10.1080/14772019.2023.2250117","DOIUrl":"https://doi.org/10.1080/14772019.2023.2250117","url":null,"abstract":"","PeriodicalId":50028,"journal":{"name":"Journal of Systematic Palaeontology","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135006841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1080/14772019.2023.2246963
Sofía Inés Quiñones, Francisco Cuadrelli, Martin de los Reyes, Carlos Alberto Luna, Daniel Gustavo Poiré, Alfredo Eduardo Zurita
AbstractWithin xenarthrans, two large groups are recognized, Pilosa (anteaters and sloths) and Cingulata (armoured xenarthrans). The latter contains Glyptodontidae, one of the most bizarre and enigmatic groups of animals that ever lived. Recent phylogenetic proposals show an early Miocene divergence into two clades, one of northern origin (Glyptodontinae) and the other with its oldest records in the early–middle Miocene of southern South America, which groups most of the recognized diversity. Although knowledge of the ‘austral clade’ has increased recently, several taxa need urgent taxonomic and phylogenetic studies to understand their evolutionary history. One case is represented by the ‘Plohophorini’, a tribe that traditionally included several genera (Plohophorus, Pseudoplohophorus, Phlyctaenopyga, Stromaphorus and Stromaphoropsis), from the late Miocene–Pliocene of the Pampean and North-Western regions of Argentina, and Uruguay. A new and terminal species of Plohophorus, P. avellaneda sp. nov., coming from the El Polvorín Formation (Pampean region of Argentina) is here reported and described, and represents the first case of a Neogene genus of glyptodont crossing the Plio–Pleistocene boundary (c. 2.53 Ma). In addition, the palaeohistological analysis on the osteoderms (the first for ‘Plohophorini’) reveals some characters not observed in other glyptodonts, highlighting its potential phylogenetic importance. The phylogenetic analysis corroborates that the well-characterized species of ‘Plohophorini’ of Uruguay and the Pampean region of Argentina (‘eastern Plohophorini’) constitute a natural group within the austral clade, since both species of Plohophorus (P. avellaneda + P. figuratus) cluster together, and are the sister taxa of Ps. absolutus + Ps. benvenutti. Along the evolutionary history of Plohophorini an increase in body mass is observed, reaching its maximum with P. avellaneda sp. nov. (c. 471 ka). Despite the high frequency of late Pliocene records, Plohophorini disappear completely from the fossil record during the Pleistocene, suggesting that this character was negatively selected.http://zoobank.org/urn:lsid:zoobank.org:pub:FF11606C-2F27-4309-9DFD-FA74E769E639Keywords: glyptodontsevolutionary history‘austral clade’morphologypalaeohistology AcknowledgementsThe authors of this contribution would like to express their gratitude to the heads of the institutions for allowing us access to the collections and the study of the material under their care. We also thank the company ‘Cementos Avellaneda S. A.’ for promoting and supporting research in palaeontology and for allowing us to study the material. We also thank both the anonymous reviewers and the associate editor, whose comments and suggestions greatly improved the manuscript. This contribution was partly funded by the projects PI Q002/17 (SGCyT-UNNE) and PICT 0765/17 (FONCyT).Supplemental materialSupplemental material for this article can be accessed here: https://doi.org/10.1080/1477
{"title":"A new species of <i>Plohophorus</i> Ameghino (Cingulata, Glyptodontidae) from the latest Pliocene–earliest Pleistocene of the Pampean Region (Argentina): the last survivor of a Neogene lineage","authors":"Sofía Inés Quiñones, Francisco Cuadrelli, Martin de los Reyes, Carlos Alberto Luna, Daniel Gustavo Poiré, Alfredo Eduardo Zurita","doi":"10.1080/14772019.2023.2246963","DOIUrl":"https://doi.org/10.1080/14772019.2023.2246963","url":null,"abstract":"AbstractWithin xenarthrans, two large groups are recognized, Pilosa (anteaters and sloths) and Cingulata (armoured xenarthrans). The latter contains Glyptodontidae, one of the most bizarre and enigmatic groups of animals that ever lived. Recent phylogenetic proposals show an early Miocene divergence into two clades, one of northern origin (Glyptodontinae) and the other with its oldest records in the early–middle Miocene of southern South America, which groups most of the recognized diversity. Although knowledge of the ‘austral clade’ has increased recently, several taxa need urgent taxonomic and phylogenetic studies to understand their evolutionary history. One case is represented by the ‘Plohophorini’, a tribe that traditionally included several genera (Plohophorus, Pseudoplohophorus, Phlyctaenopyga, Stromaphorus and Stromaphoropsis), from the late Miocene–Pliocene of the Pampean and North-Western regions of Argentina, and Uruguay. A new and terminal species of Plohophorus, P. avellaneda sp. nov., coming from the El Polvorín Formation (Pampean region of Argentina) is here reported and described, and represents the first case of a Neogene genus of glyptodont crossing the Plio–Pleistocene boundary (c. 2.53 Ma). In addition, the palaeohistological analysis on the osteoderms (the first for ‘Plohophorini’) reveals some characters not observed in other glyptodonts, highlighting its potential phylogenetic importance. The phylogenetic analysis corroborates that the well-characterized species of ‘Plohophorini’ of Uruguay and the Pampean region of Argentina (‘eastern Plohophorini’) constitute a natural group within the austral clade, since both species of Plohophorus (P. avellaneda + P. figuratus) cluster together, and are the sister taxa of Ps. absolutus + Ps. benvenutti. Along the evolutionary history of Plohophorini an increase in body mass is observed, reaching its maximum with P. avellaneda sp. nov. (c. 471 ka). Despite the high frequency of late Pliocene records, Plohophorini disappear completely from the fossil record during the Pleistocene, suggesting that this character was negatively selected.http://zoobank.org/urn:lsid:zoobank.org:pub:FF11606C-2F27-4309-9DFD-FA74E769E639Keywords: glyptodontsevolutionary history‘austral clade’morphologypalaeohistology AcknowledgementsThe authors of this contribution would like to express their gratitude to the heads of the institutions for allowing us access to the collections and the study of the material under their care. We also thank the company ‘Cementos Avellaneda S. A.’ for promoting and supporting research in palaeontology and for allowing us to study the material. We also thank both the anonymous reviewers and the associate editor, whose comments and suggestions greatly improved the manuscript. This contribution was partly funded by the projects PI Q002/17 (SGCyT-UNNE) and PICT 0765/17 (FONCyT).Supplemental materialSupplemental material for this article can be accessed here: https://doi.org/10.1080/1477","PeriodicalId":50028,"journal":{"name":"Journal of Systematic Palaeontology","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135501662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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