A redescription of <i>Trachelosaurus fischeri</i> from the Buntsandstein (Middle Triassic) of Bernburg, Germany: the first European <i>Dinocephalosaurus</i>-like marine reptile and its systematic implications for long-necked early archosauromorphs

doi:10.1186/s13358-024-00309-6

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	A redescription of Trachelosaurus fischeri from the Buntsandstein (Middle Triassic) of Bernburg, Germany: the first European Dinocephalosaurus-like marine reptile and its systematic implications for long-necked early archosauromorphs
	Spiekman, Stephan N. F.1; Ezcurra, Martin D.2; Rytel, Adam 3; Wang, Wei 4; Mujal, Eudald 1,5; Buchwitz, Michael 6; Schoch, Rainer R.1,7
	2024-12-01
发表期刊	SWISS JOURNAL OF PALAEONTOLOGY
ISSN	1664-2376
卷号	143 期号:1 页码:33
通讯作者	Spiekman, Stephan N. F.(stephanspiekman@gmail.com)
摘要	Some of the earliest members of the archosaur-lineage (i.e., non-archosauriform archosauromorphs) are characterised by an extremely elongated neck. Recent fossil discoveries from the Guanling Formation (Middle Triassic) of southern China have revealed a dramatic increase in the known ecomorphological diversity of these extremely long-necked archosauromorphs, including the fully marine and viviparous Dinocephalosaurus orientalis. These recent discoveries merit a reinvestigation of enigmatic Triassic diapsid fossils from contemporaneous European deposits housed in historical collections. Here, we provide a redescription of Trachelosaurus fischeri, represented by a single, disarticulated specimen first described in 1918. Due to its unique morphology, which includes short, bifurcating cervical ribs, and a high presacral vertebral count, this taxon has been referred to either as a "protorosaurian" archosauromorph or a sauropterygian. Our revision clearly shows that Trachelosaurus represents the first unambiguous Dinocephalosaurus-like archosauromorph known from outside the Guanling Formation. Our finding has important systematic implications. Trachelosauridae Abel, 1919 represents the senior synonym for the recently identified Dinocephalosauridae Spiekman, Fraser and Scheyer, 2021. Based on our phylogenetic analyses, which employ two extensive datasets, we also corroborate previous findings that tanystropheids and trachelosaurids represent two families within a larger monophyletic group among non-crocopodan archosauromorphs, which is here named Tanysauria (clade nov.). Trachelosauridae is minimally composed of Trachelosaurus fischeri, Dinocephalosaurus orientalis, Pectodens zhenyuensis, and Austronaga minuta, but one of our analyses also found a probably taxonomically broader clade that may also include Gracilicollum latens and Fuyuansaurus acutirostris. Trachelosaurus fischeri considerably expands the known spatial and temporal range of Trachelosauridae to the earliest Anisian and the Central European Basin. Our findings add to the growing evidence for the presence of a diverse group of fully marine reptiles during the Middle Triassic among Tanysauria. These trachelosaurids possess flipper-like limbs, high vertebral counts, and elongate necks, thus superficially resembling long-necked Jurassic and Cretaceous plesiosaurs in some regards.
关键词	Trachelosaurus Tanysauria Dinocephalosaurus Archosauromorpha Middle Triassic Buntsandstein Osteology Phylogeny Marine reptiles
DOI	10.1186/s13358-024-00309-6
关键词[WOS]	ORIGIN ; INTERRELATIONSHIPS ; PROTOROSAURIA ; DINOSAURS ; MEYER
收录类别	SCI
语种	英语
资助项目	Deutsche Forschungsgemeinschaft[SCHO 791/7-1] ; Agencia Nacional de Promocion Cientifica y Tecnologica[PICT 2018-01186]
项目资助者	Deutsche Forschungsgemeinschaft ; Agencia Nacional de Promocion Cientifica y Tecnologica
WOS研究方向	Paleontology
WOS类目	Paleontology
WOS记录号	WOS:001184317100001
出版者	SPRINGER INT PUBL AG
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/23528
专题	中国科学院古脊椎动物与古人类研究所
通讯作者	Spiekman, Stephan N. F.
作者单位	1.Staatl Museum Naturkunde Stuttgart, Rosenstein 1, DE-70191 Stuttgart, Germany 2.Consejo Nacl Invest Cient & Tecn, Secc Paleontol Vertebrados, Museo Argentino Ciencias Nat Bernardino Rivadavia, Angel Gallardo 470,Ciudad Autonoma, RA-C1405DJR Buenos Aires, Argentina 3.Polish Acad Sci, Inst Paleobiol, Twarda 51-55, PL-00818 Warsaw, Poland 4.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing, Peoples R China 5.Univ Autonoma Barcelona, Inst Catala Paleontol Miquel Crusafont ICP CERCA, Edif ICTA ICP,C Columnes S-N,Campus UAB, Cerdanyola Del Valles 08193, Barcelona, Spain 6.Naturkunde Museum, D-39104 Magdeburg, Germany 7.Univ Hohenheim, Inst Biol, Fachgebiet Palaontol, D-70599 Stuttgart, Germany
推荐引用方式 GB/T 7714	Spiekman, Stephan N. F.,Ezcurra, Martin D.,Rytel, Adam,et al. A redescription of Trachelosaurus fischeri from the Buntsandstein (Middle Triassic) of Bernburg, Germany: the first European Dinocephalosaurus-like marine reptile and its systematic implications for long-necked early archosauromorphs[J]. SWISS JOURNAL OF PALAEONTOLOGY,2024,143(1):33.
APA	Spiekman, Stephan N. F..,Ezcurra, Martin D..,Rytel, Adam.,Wang, Wei.,Mujal, Eudald.,...&Schoch, Rainer R..(2024).A redescription of Trachelosaurus fischeri from the Buntsandstein (Middle Triassic) of Bernburg, Germany: the first European Dinocephalosaurus-like marine reptile and its systematic implications for long-necked early archosauromorphs.SWISS JOURNAL OF PALAEONTOLOGY,143(1),33.
MLA	Spiekman, Stephan N. F.,et al."A redescription of Trachelosaurus fischeri from the Buntsandstein (Middle Triassic) of Bernburg, Germany: the first European Dinocephalosaurus-like marine reptile and its systematic implications for long-necked early archosauromorphs".SWISS JOURNAL OF PALAEONTOLOGY 143.1(2024):33.