From the Terrestrial Upper Triassic of China
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Ischigualasto Formation. the Second Is a Sile- Diversity Or Abundance, but This Result Was Based on Only 19 of Saurid, Ignotosaurus Fragilis (Fig
This article was downloaded by: [University of Chicago Library] On: 10 October 2013, At: 10:52 Publisher: Taylor & Francis Informa Ltd Registered in England and Wales Registered Number: 1072954 Registered office: Mortimer House, 37-41 Mortimer Street, London W1T 3JH, UK Journal of Vertebrate Paleontology Publication details, including instructions for authors and subscription information: http://www.tandfonline.com/loi/ujvp20 Vertebrate succession in the Ischigualasto Formation Ricardo N. Martínez a , Cecilia Apaldetti a b , Oscar A. Alcober a , Carina E. Colombi a b , Paul C. Sereno c , Eliana Fernandez a b , Paula Santi Malnis a b , Gustavo A. Correa a b & Diego Abelin a a Instituto y Museo de Ciencias Naturales, Universidad Nacional de San Juan , España 400 (norte), San Juan , Argentina , CP5400 b Consejo Nacional de Investigaciones Científicas y Técnicas , Buenos Aires , Argentina c Department of Organismal Biology and Anatomy, and Committee on Evolutionary Biology , University of Chicago , 1027 East 57th Street, Chicago , Illinois , 60637 , U.S.A. Published online: 08 Oct 2013. To cite this article: Ricardo N. Martínez , Cecilia Apaldetti , Oscar A. Alcober , Carina E. Colombi , Paul C. Sereno , Eliana Fernandez , Paula Santi Malnis , Gustavo A. Correa & Diego Abelin (2012) Vertebrate succession in the Ischigualasto Formation, Journal of Vertebrate Paleontology, 32:sup1, 10-30, DOI: 10.1080/02724634.2013.818546 To link to this article: http://dx.doi.org/10.1080/02724634.2013.818546 PLEASE SCROLL DOWN FOR ARTICLE Taylor & Francis makes every effort to ensure the accuracy of all the information (the “Content”) contained in the publications on our platform. However, Taylor & Francis, our agents, and our licensors make no representations or warranties whatsoever as to the accuracy, completeness, or suitability for any purpose of the Content. -
8. Archosaur Phylogeny and the Relationships of the Crocodylia
8. Archosaur phylogeny and the relationships of the Crocodylia MICHAEL J. BENTON Department of Geology, The Queen's University of Belfast, Belfast, UK JAMES M. CLARK* Department of Anatomy, University of Chicago, Chicago, Illinois, USA Abstract The Archosauria include the living crocodilians and birds, as well as the fossil dinosaurs, pterosaurs, and basal 'thecodontians'. Cladograms of the basal archosaurs and of the crocodylomorphs are given in this paper. There are three primitive archosaur groups, the Proterosuchidae, the Erythrosuchidae, and the Proterochampsidae, which fall outside the crown-group (crocodilian line plus bird line), and these have been defined as plesions to a restricted Archosauria by Gauthier. The Early Triassic Euparkeria may also fall outside this crown-group, or it may lie on the bird line. The crown-group of archosaurs divides into the Ornithosuchia (the 'bird line': Orn- ithosuchidae, Lagosuchidae, Pterosauria, Dinosauria) and the Croco- dylotarsi nov. (the 'crocodilian line': Phytosauridae, Crocodylo- morpha, Stagonolepididae, Rauisuchidae, and Poposauridae). The latter three families may form a clade (Pseudosuchia s.str.), or the Poposauridae may pair off with Crocodylomorpha. The Crocodylomorpha includes all crocodilians, as well as crocodi- lian-like Triassic and Jurassic terrestrial forms. The Crocodyliformes include the traditional 'Protosuchia', 'Mesosuchia', and Eusuchia, and they are defined by a large number of synapomorphies, particularly of the braincase and occipital regions. The 'protosuchians' (mainly Early *Present address: Department of Zoology, Storer Hall, University of California, Davis, Cali- fornia, USA. The Phylogeny and Classification of the Tetrapods, Volume 1: Amphibians, Reptiles, Birds (ed. M.J. Benton), Systematics Association Special Volume 35A . pp. 295-338. Clarendon Press, Oxford, 1988. -
Osteology of Pseudochampsa Ischigualastensis Gen. Et Comb. Nov
RESEARCH ARTICLE Osteology of Pseudochampsa ischigualastensis gen. et comb. nov. (Archosauriformes: Proterochampsidae) from the Early Late Triassic Ischigualasto Formation of Northwestern Argentina M. Jimena Trotteyn1,2*, Martı´n D. Ezcurra3 1. CONICET, Consejo Nacional de Investigaciones Cientı´ficas y Te´cnicas, Ciudad Auto´noma de Buenos Aires, Buenos Aires, Argentina, 2. INGEO, Instituto de Geologı´a, Facultad de Ciencias Exactas, Fı´sicas y Naturales, Universidad Nacional de San Juan, San Juan, San Juan, Argentina, 3. School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, West Midlands, United Kingdom *[email protected] Abstract OPEN ACCESS Proterochampsids are crocodile-like, probably semi-aquatic, quadrupedal Citation: Trotteyn MJ, Ezcurra MD (2014) Osteology archosauriforms characterized by an elongated and dorsoventrally low skull. The of Pseudochampsa ischigualastensis gen. et comb. nov. (Archosauriformes: Proterochampsidae) from the group is endemic from the Middle-Late Triassic of South America. The most Early Late Triassic Ischigualasto Formation of recently erected proterochampsid species is ‘‘Chanaresuchus ischigualastensis’’, Northwestern Argentina. PLoS ONE 9(11): e111388. doi:10.1371/journal.pone.0111388 based on a single, fairly complete skeleton from the early Late Triassic Editor: Peter Dodson, University of Pennsylvania, Ischigualasto Formation of northwestern Argentina. We describe here in detail the United States of America non-braincase cranial and postcranial anatomy -
Comparative Bone Microstructure of Three Archosauromorphs from the Carnian, Late Triassic Chañares Formation of Argentina
Comparative bone microstructure of three archosauromorphs from the Carnian, Late Triassic Chañares Formation of Argentina JORDI ALEXIS GARCIA MARSÀ, FEDERICO L. AGNOLÍN, and FERNANDO E. NOVAS Marsà, J.A.G., Agnolín, F.L., and Novas, F.E. 2020. Comparative bone microstructure of three archosauromorphs from the Carnian, Late Triassic Chañares Formation of Argentina. Acta Palaeontologica Polonica 65 (2): 387–398. The Chañares Formation exhibits one of the most important archosauriform records of early Carnian ecosystems. Here we present new data on the palaeohistology of Chañares archosauriforms and provide new insights into their paleobiology, as well as possible phylogenetically informative traits. Bone microstructure of Lagerpeton chanarensis and Tropidosuchus romeri is dominated by fibro-lamellar tissue and dense vascularization. On the other hand, Chanaresuchus bonapartei is more densely vascularized, but with cyclical growth characterized by alternate fibro-lamellar, parallel-fibered and lamellar-zonal tissues. Dense vascularization and fibro-lamellar tissue imply fast growth and high metabolic rates for all these taxa. These histological traits may be tentatively interpreted as a possible adaptative advantage in front of Chañares Formation environmental conditions. Key words: Archosauromorpha, Lagerpeton, Tropidosuchus, paleobiology, paleohistology, Mesozoic, South America. Jordi Alexis Garcia Marsà [[email protected]] and Fernando E. Novas [[email protected]], Labora- torio de Anatomía Comparada y Evolución de los Vertebrados, -
University of Birmingham the Earliest Bird-Line Archosaurs and The
University of Birmingham The earliest bird-line archosaurs and the assembly of the dinosaur body plan Nesbitt, Sterling; Butler, Richard; Ezcurra, Martin; Barrett, Paul; Stocker, Michelle; Angielczyk, Kenneth; Smith, Roger; Sidor, Christian; Niedzwiedzki, Grzegorz; Sennikov, Andrey; Charig, Alan DOI: 10.1038/nature22037 License: None: All rights reserved Document Version Peer reviewed version Citation for published version (Harvard): Nesbitt, S, Butler, R, Ezcurra, M, Barrett, P, Stocker, M, Angielczyk, K, Smith, R, Sidor, C, Niedzwiedzki, G, Sennikov, A & Charig, A 2017, 'The earliest bird-line archosaurs and the assembly of the dinosaur body plan', Nature, vol. 544, no. 7651, pp. 484-487. https://doi.org/10.1038/nature22037 Link to publication on Research at Birmingham portal Publisher Rights Statement: Checked for eligibility: 03/03/2017. General rights Unless a licence is specified above, all rights (including copyright and moral rights) in this document are retained by the authors and/or the copyright holders. The express permission of the copyright holder must be obtained for any use of this material other than for purposes permitted by law. •Users may freely distribute the URL that is used to identify this publication. •Users may download and/or print one copy of the publication from the University of Birmingham research portal for the purpose of private study or non-commercial research. •User may use extracts from the document in line with the concept of ‘fair dealing’ under the Copyright, Designs and Patents Act 1988 (?) •Users may not further distribute the material nor use it for the purposes of commercial gain. Where a licence is displayed above, please note the terms and conditions of the licence govern your use of this document. -
On the Presence of the Subnarial Foramen in Prestosuchus Chiniquensis (Pseudosuchia: Loricata) with Remarks on Its Phylogenetic Distribution
Anais da Academia Brasileira de Ciências (2016) (Annals of the Brazilian Academy of Sciences) Printed version ISSN 0001-3765 / Online version ISSN 1678-2690 http://dx.doi.org/10.1590/0001-3765201620150456 www.scielo.br/aabc On the presence of the subnarial foramen in Prestosuchus chiniquensis (Pseudosuchia: Loricata) with remarks on its phylogenetic distribution LÚCIO ROBERTO-DA-SILVA1,2, MARCO A.G. FRANÇA3, SÉRGIO F. CABREIRA3, RODRIGO T. MÜLLER1 and SÉRGIO DIAS-DA-SILVA4 ¹Programa de Pós-Graduação em Biodiversidade Animal, Universidade Federal de Santa Maria, Av. Roraima, 1000, Bairro Camobi, 97105-900 Santa Maria, RS, Brasil ²Laboratório de Paleontologia, Universidade Luterana do Brasil, Av. Farroupilha, 8001, Bairro São José, 92425-900 Canoas, RS, Brasil ³Laboratório de Paleontologia e Evolução de Petrolina, Campus de Ciências Agrárias, Universidade Federal do Vale do São Francisco, Rodovia BR 407, Km12, Lote 543, 56300-000 Petrolina, PE, Brasil 4Centro de Apoio à Pesquisa da Quarta Colônia, Universidade Federal de Santa Maria, Rua Maximiliano Vizzotto, 598, 97230-000 São João do Polêsine, RS, Brasil Manuscript received on July 1, 2015; accepted for publication on April 15, 2016 ABSTRACT Many authors have discussed the subnarial foramen in Archosauriformes. Here presence among Archosauriformes, shape, and position of this structure is reported and its phylogenetic importance is investigated. Based on distribution and the phylogenetic tree, it probably arose independently in Erythrosuchus, Herrerasaurus, and Paracrocodylomorpha. In Paracrocodylomorpha the subnarial foramen is oval-shaped, placed in the middle height of the main body of the maxilla, and does not reach the height of ascending process. In basal loricatans from South America (Prestosuchus chiniquensis and Saurosuchus galilei) the subnarial foramen is ‘drop-like’ shaped, the subnarial foramen is located above the middle height of the main body of the maxilla, reaching the height of ascending process, a condition also present in Herrerasaurus ischigualastensis. -
New Insights on Prestosuchus Chiniquensis Huene
New insights on Prestosuchus chiniquensis Huene, 1942 (Pseudosuchia, Loricata) based on new specimens from the “Tree Sanga” Outcrop, Chiniqua´ Region, Rio Grande do Sul, Brazil Marcel B. Lacerda1, Bianca M. Mastrantonio1, Daniel C. Fortier2 and Cesar L. Schultz1 1 Instituto de Geocieˆncias, Laborato´rio de Paleovertebrados, Universidade Federal do Rio Grande do Sul–UFRGS, Porto Alegre, Rio Grande do Sul, Brazil 2 CHNUFPI, Campus Amı´lcar Ferreira Sobral, Universidade Federal do Piauı´, Floriano, Piauı´, Brazil ABSTRACT The ‘rauisuchians’ are a group of Triassic pseudosuchian archosaurs that displayed a near global distribution. Their problematic taxonomic resolution comes from the fact that most taxa are represented only by a few and/or mostly incomplete specimens. In the last few decades, renewed interest in early archosaur evolution has helped to clarify some of these problems, but further studies on the taxonomic and paleobiological aspects are still needed. In the present work, we describe new material attributed to the ‘rauisuchian’ taxon Prestosuchus chiniquensis, of the Dinodontosaurus Assemblage Zone, Middle Triassic (Ladinian) of the Santa Maria Supersequence of southern Brazil, based on a comparative osteologic analysis. Additionally, we present well supported evidence that these represent juvenile forms, due to differences in osteological features (i.e., a subnarial fenestra) that when compared to previously described specimens can be attributed to ontogeny and indicate variation within a single taxon of a problematic but important -
Ministerio De Cultura Y Educacion Fundacion Miguel Lillo
MINISTERIO DE CULTURA Y EDUCACION FUNDACION MIGUEL LILLO NEW MATERIALS OF LAGOSUCHUS TALAMPAYENSIS ROMER (THECODONTIA - PSEUDOSUCHIA) AND ITS SIGNIFICANCE ON THE ORIGIN J. F. BONAPARTE OF THE SAURISCHIA. LOWER CHANARIAN, MIDDLE TRIASSIC OF ARGENTINA ACTA GEOLOGICA LILLOANA 13, 1: 5-90, 10 figs., 4 pl. TUCUMÁN REPUBLICA ARGENTINA 1975 NEW MATERIALS OF LAGOSUCHUS TALAMPAYENSIS ROMER (THECODONTIA - PSEUDOSUCHIA) AND ITS SIGNIFICANCE ON THE ORIGIN OF THE SAURISCHIA LOWER CHANARIAN, MIDDLE TRIASSIC OF ARGENTINA* by JOSÉ F. BONAPARTE Fundación Miguel Lillo - Career Investigator Member of CONICET ABSTRACT On the basis of new remains of Lagosuchus that are thoroughly described, including most of the skeleton except the manus, it is assumed that Lagosuchus is a form intermediate between Pseudosuchia and Saurischia. The presacral vertebrae show three morphological zones that may be related to bipedality: 1) the anterior cervicals; 2) short cervico-dorsals; and 3) the posterior dorsals. The pelvis as a whole is advanced, in particular the pubis and acetabular area of the ischium, but the ilium is rather primitive. The hind limb has a longer tibia than femur, and the symmetrical foot is as long as the tibia. The tarsus is of the mesotarsal type. The morphology of the distal area of the tibia and fibula, and the proximal area of the tarsus, suggest a stage transitional between the crurotarsal and mesotarsal conditions. The forelimb is proportionally short, 48% of the hind limb. The humerus is slender, with advanced features in the position of the deltoid crest. The radius and ulna are also slender, the latter with a pronounced olecranon process. A new family of Pseudosuchia is proposed for this form: Lagosuchidae. -
Heptasuchus Clarki, from the ?Mid-Upper Triassic, Southeastern Big Horn Mountains, Central Wyoming (USA)
The osteology and phylogenetic position of the loricatan (Archosauria: Pseudosuchia) Heptasuchus clarki, from the ?Mid-Upper Triassic, southeastern Big Horn Mountains, Central Wyoming (USA) † Sterling J. Nesbitt1, John M. Zawiskie2,3, Robert M. Dawley4 1 Department of Geosciences, Virginia Tech, Blacksburg, VA, USA 2 Cranbrook Institute of Science, Bloomfield Hills, MI, USA 3 Department of Geology, Wayne State University, Detroit, MI, USA 4 Department of Biology, Ursinus College, Collegeville, PA, USA † Deceased author. ABSTRACT Loricatan pseudosuchians (known as “rauisuchians”) typically consist of poorly understood fragmentary remains known worldwide from the Middle Triassic to the end of the Triassic Period. Renewed interest and the discovery of more complete specimens recently revolutionized our understanding of the relationships of archosaurs, the origin of Crocodylomorpha, and the paleobiology of these animals. However, there are still few loricatans known from the Middle to early portion of the Late Triassic and the forms that occur during this time are largely known from southern Pangea or Europe. Heptasuchus clarki was the first formally recognized North American “rauisuchian” and was collected from a poorly sampled and disparately fossiliferous sequence of Triassic strata in North America. Exposed along the trend of the Casper Arch flanking the southeastern Big Horn Mountains, the type locality of Heptasuchus clarki occurs within a sequence of red beds above the Alcova Limestone and Crow Mountain formations within the Chugwater Group. The age of the type locality is poorly constrained to the Middle—early Late Triassic and is Submitted 17 June 2020 Accepted 14 September 2020 likely similar to or just older than that of the Popo Agie Formation assemblage from Published 27 October 2020 the western portion of Wyoming. -
1. Kannemeyeriiformes from Shanxi, China
DOI:10.19615/j.cnki.1000-3118.2015.01.002 第53卷 第1期 古 脊 椎 动 物 学 报 pp. 16-28 2015年1月 VERTEBRATA PALASIATICA fi gs. 1-6 New discoveries from the Sinokannemeyeria-Shansisuchus Assemblage Zone: 1. Kannemeyeriiformes from Shanxi, China LIU Jun (Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences Beijing 100044 [email protected]) Abstract Recently, some new tetrapod fossils were collected along the Yellow River in Shanxi Province. From the Member I of the Tongchuan Formation at Baidaoyu in Linxian County, at least one species of Parakannemeyeria, and one new species of Sinokannemeyeria, S. baidaoyuensis, are identifi ed. The new species is characterized by prefrontal anterior extension level to posterior margin of postnarial excavation. From the Ermaying Formation in Liulin County, a third kannemeyeriid genus is identified for the Sinokannemeyeria-Shansisuchus Assemblage. The new findings increase the content and time extension of the Sinokannemeyeria-Shansisuchus Assemblage. Key words Shanxi, Middle Triassic, Ermaying Formation, Tongchuan Formation, Sinokannemeyeria, Parakannemeyeria 1 Introduction In North China, terrestrial Triassic deposits are widely distributed, but the tetrapod fossils have only been discovered from the Heshanggou, Ermaying and Tongchuan formations (Li et al., 2008). The Ermaying Formation is the richest source of Triassic tetrapods of China, with the lower part having yielded the Shaanbeikannemeyeria-Fugusuchus assemblage and the upper part having yielded the Sinokannemeyeria-Shansisuchus assemblage (or Shansidon assemblage) (Li and Cheng, 1995; Sun, 1980). In contrast, the Tongchuan Formation was long considered barren of fossil tetrapods, with the sole exception of the archosauriform Yonghesuchus from Member II of the formation (Liu et al., 2001; Wu et al., 2001). -
The First Triassic 'Protodonatan' (Zygophlebiidae) from China
Geol. Mag. 154 (1), 2017, pp. 169–174. c Cambridge University Press 2016 169 doi:10.1017/S0016756816000625 RAPID COMMUNICATION The first Triassic ‘Protodonatan’ (Zygophlebiidae) from China: stratigraphical implications ∗ ∗ D. R. ZHENG ‡†, A. NEL§, B. WANG‡¶, E. A. JARZEMBOWSKI‡, S.-C. CHANG & H. C. ZHANG‡† ∗ Department of Earth Sciences, The University of Hong Kong, Hong Kong Special Administrative Region, China ‡State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, 39 East Beijing Road, Nanjing 210008, China §Institut de Systématique, Évolution, Biodiversité, ISYEB-UMR 7205-CNRS, MNHN, UPMC, EPHE, Muséum national d’Histoire naturelle, Sorbonne Universités, 57 rue Cuvier, CP 50, Entomologie, F-75005, Paris, France ¶Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, 1, Beichen West Road, Beijing 100101, China Department of Earth Sciences, The Natural History Museum, London SW7 5BD, UK (Received 16 February 2016; accepted 1 June 2016; first published online 21 July 2016) Abstract 2001). It seems, however, to have been distributed world- wide as it is known from France (Middle–Upper Triassic), The clade Triadophlebioptera within the Odonatoptera Germany (Middle Triassic), Kyrgyzstan (Middle–Upper Tri- greatly diversified and became widely distributed world- assic), Russia (Upper Permian), Spain (Middle Triassic) and wide during the Triassic. Although abundant insect fossils Australia (Middle Triassic) (Nel et al. 2001; Béthoux et al. have been reported from the Triassic of China, no Triassic 2009; Béthoux & Beattie, 2010). dragonflies have been recorded. In this paper, Zygophlebia In China, abundant dragonfly fossils have been reported tongchuanensis sp. nov., the first species of Zygophlebiidae from the Middle Jurassic – Lower Cretaceous (Fleck & Nel, discovered outside the Madygen Formation of Kyrgyzstan, is 2002;Renet al. -
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Edinburgh Research Explorer The sail-backed reptile Ctenosauriscus from the latest Early Triassic of Germany and the timing and biogeography of the early archosaur radiation Citation for published version: Butler, RJ, Brusatte, SL, Reich, M, Hornung, JJ, Nesbitt, SJ & Schoch, RR 2011, 'The sail-backed reptile Ctenosauriscus from the latest Early Triassic of Germany and the timing and biogeography of the early archosaur radiation', PLoS ONE, vol. 6, no. 10. https://doi.org/10.1371/journal.pone.0025693 Digital Object Identifier (DOI): 10.1371/journal.pone.0025693 Link: Link to publication record in Edinburgh Research Explorer Document Version: Publisher's PDF, also known as Version of record Published In: PLoS ONE Publisher Rights Statement: This is an Open-Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly cited. Made available through the Public Library of Science (2011) General rights Copyright for the publications made accessible via the Edinburgh Research Explorer is retained by the author(s) and / or other copyright owners and it is a condition of accessing these publications that users recognise and abide by the legal requirements associated with these rights. Take down policy The University of Edinburgh has made every reasonable effort to ensure that Edinburgh Research Explorer content complies with UK legislation. If you believe that the public display of this file breaches copyright please contact [email protected] providing details, and we will remove access to the work immediately and investigate your claim.