Project 3173: S. J. Nesbitt, R. J. Butler, M. D. Ezcurra, A. J. Charig, P. M. Barrett. 2018. The anatomy of Teleocrater Rhadinus, an early avemetatarsalian from the lower portion of the Lifua Member of the Manda Beds (Middle Triassic). Journal of Vertebrate Paleontology. 37 (sup1):142-177.
Specimen: † Teleocrater rhadinus (unvouchered)
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Abstract

Bird-line archosaurs (= Avemetatarsalia, the clade containing birds, dinosaurs, pterosaurs, and their kin) originated in the Triassic Period. However, the earliest evolution of this group is poorly documented because fossils are extremely rare and consist mostly of postcrania. Here, we document the osteology of Teleocrater rhadinus, an early avemetatarsalian from the lower portion of the Middle Triassic Lifua Member of the Manda Beds of the Ruhuhu Basin, southwestern Tanzania. Material of Teleocrater rhadinus includes the holotype partial skeleton comprising a single individual, including cervical, trunk, and caudal vertebrae, pectoral, pelvic, forelimb, and hind limb material, and referred specimens representing parts (skull elements, vertebrae, pectoral, pelvic, and limb elements) of at least three other individuals collected from a bonebed. Character states of the skull elements, vertebrae, girdles, and limbs indicate that Teleocrater rhadinus represents the first documented non-ornithodiran avemetatarsalian known from well-preserved, associated material. Furthermore, Teleocrater rhadinus forms part of a newly recognized clade, Aphanosauria, which also contains formerly enigmatic archosaur taxa from across Pangea, including Dongusuchus efremovi from the Middle Triassic of Russia, Yarasuchus deccanensis from the Middle Triassic of India, and Spondylosoma absconditum from the Middle Triassic of Brazil. This new clade and other new discoveries from the Middle to Late Triassic elucidate the sequence of character acquisitions at the base of Avemetatarsalia and fill a crucial gap in the understanding of the anatomical transformations that enabled dinosaurs to flourish later in the Mesozoic.


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Article DOI: 10.1080/02724634.2017.1396539

Project DOI: 10.7934/P3173, http://dx.doi.org/10.7934/P3173
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 96 Taxa
  • 2 Specimens
  • 419 Characters
Total size of project's media files: 1 MB

Download Project SDD File
Total scored cells: 22344
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 419
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 949
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:400/19
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MorphoBank Project 3173

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    Taxonomic Overview for Matrix 'M25591' (95 Taxa)

    taxon unscored
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    [1] † Mesosuchus browni
    Last Modified in 08/17/18
    8433533500003
    [2] † Prolacerta broomi
    Last Modified in 08/17/18
    5636336300003
    [3] † Archosaurus rossicus
    Last Modified in 08/17/18
    4145500003
    [4] † Proterosuchus
    Last Modified in 08/17/18
    5136836800003
    [5] † Erythrosuchus africanus
    Last Modified in 08/17/18
    5036936900003
    [6] † Vancleavea campi
    Last Modified in 08/17/18
    13428528500003
    [7] † Chanaresuchus bonapartei
    Last Modified in 08/17/18
    5336736600003
    [8] † Tropidosuchus romeri
    Last Modified in 08/17/18
    10331731600003
    [9] † Euparkeria capensis
    Last Modified in 08/17/18
    1840240100003
    [10] † Parasuchus hislopi
    Last Modified in 08/17/18
    6635335300003
    [11] † Smilosuchus gregorii
    Last Modified in 08/17/18
    7634334300003
    [12] † Machaeroprosopus pristinus
    Last Modified in 08/17/18
    3338638600003
    [13] † Gracilisuchus stipanicicorum
    Last Modified in 08/17/18
    10831531001003
    [14] † Turfanosuchus dabanensis
    Last Modified in 08/17/18
    14727327200003
    [15] † Yonghesuchus sangbiensis
    Last Modified in 08/17/18
    328919001003
    [16] † Ornithosuchus longidens
    Last Modified in 08/17/18
    14027927900003
    [17] † Riojasuchus tenuisceps
    Last Modified in 08/17/18
    6235735700003
    [18] † Revueltosaurus callenderi
    Last Modified in 08/17/18
    4737237200003
    [19] † Stagonolepis robertsoni
    Last Modified in 08/17/18
    10131831800003
    [20] † Aetosaurus ferratus
    Last Modified in 08/17/18
    15226826700003
    [21] † Longosuchus meadei
    Last Modified in 08/17/18
    7034934900003
    [22] † Ticinosuchus ferox
    Last Modified in 08/17/18
    21220720700003
    [23] † Qianosuchus mixtus
    Last Modified in 08/17/18
    13128828800003
    [24] † Xilousuchus sapingensis
    Last Modified in 08/17/18
    30011911900003
    [25] † Arizonasaurus babbitti
    Last Modified in 08/17/18
    16325625600003
    [26] † Poposaurus gracilis holotype
    Last Modified in 08/17/18
    380383801003
    [27] † Poposaurus gracilis yale
    Last Modified in 08/17/18
    20221721601003
    [28] † Lotosaurus adentus
    Last Modified in 08/17/18
    10331631600003
    [29] † Sillosuchus longicervix
    Last Modified in 08/17/18
    338808001003
    [30] † Effigia okeeffeae
    Last Modified in 08/17/18
    9832032001003
    [31] † Shuvosaurus inexpectatus
    Last Modified in 08/17/18
    10731131101003
    [32] † Prestosuchus chiniquensis
    Last Modified in 08/17/18
    24517417400003
    [33] † UFRGS 0156 t
    Last Modified in 08/17/18
    25116816800003
    [34] † UFRGS 152 t
    Last Modified in 08/17/18
    15126826800003
    [35] † Combined prestosuchus
    Last Modified in 08/17/18
    6135835800003
    [36] † Saurosuchus galilei
    Last Modified in 08/17/18
    10931031000003
    [37] † Batrachotomus kuperferzellensis
    Last Modified in 08/17/18
    6335635600003
    [38] † Fasolasuchus tenax
    Last Modified in 08/17/18
    25616316300003
    [39] † Rauisuchus triradentes
    Last Modified in 08/17/18
    28513413400003
    [40] † Polonosuchus silesiacus
    Last Modified in 08/17/18
    30011911900003
    [41] † Postosuchus kirkpatricki
    Last Modified in 08/17/18
    7634334300003
    [42] † Postosuchus alisonae
    Last Modified in 08/17/18
    24917017000003
    [43] † CM 73372
    Last Modified in 08/17/18
    25516316301003
    [44] † Hesperosuchus agilis holotype
    Last Modified in 08/17/18
    20021921900003
    [45] † Dromicosuchus grallator
    Last Modified in 08/17/18
    14527427400003
    [46] † Hesperosuchus agilis cm
    Last Modified in 08/17/18
    13128828800003
    [47] † Dibothrosuchus elaphros
    Last Modified in 08/17/18
    19822022001003
    [48] † Terrestrisuchus gracilis
    Last Modified in 08/17/18
    10031831801003
    [49] † Sphenosuchus acutus
    Last Modified in 08/17/18
    20121821800003
    [50] † Litargosuchus leptorhynchus
    Last Modified in 08/17/18
    22919019000003
    [51] † Kayentasuchus walkeri
    Last Modified in 08/17/18
    31010810801003
    [52] † Orthosuchus stormbergi
    Last Modified in 08/17/18
    9632232201003
    [53] Alligator mississippiensis
    Last Modified in 08/17/18
    4637437201003
    [54] † Protosuchus haughtoni
    Last Modified in 08/17/18
    26015915900003
    [55] † Protosuchus richardsoni
    Last Modified in 08/17/18
    5436436401003
    [56] † Eudimorphodon ranzii
    Last Modified in 08/17/18
    22919019000003
    [57] † Dimorphodon macronyx
    Last Modified in 08/17/18
    21920020000003
    [58] † Lagerpeton chanarensis
    Last Modified in 08/17/18
    28813113100003
    [59] † Dromomeron gregorii
    Last Modified in 08/17/18
    376434300003
    [60] † Dromomeron romeri
    Last Modified in 08/17/18
    356636300003
    [61] † Marasuchus lilloensis
    Last Modified in 08/17/18
    21520420400003
    [62] † Eucoelophysis baldwini
    Last Modified in 08/17/18
    392272700003
    [63] † Sacisaurus agudoensis
    Last Modified in 08/17/18
    327929200003
    [64] † Lewisuchus admixtus
    Last Modified in 08/17/18
    28613313300003
    [65] † Pseudolagosuchus majori
    Last Modified in 08/17/18
    322979700003
    [66] † Lewisuchus pseudolagosuchus
    Last Modified in 08/17/18
    19122822800003
    [67] † Eocursor parvus
    Last Modified in 08/17/18
    27614214201003
    [68] † Silesaurus opolensis
    Last Modified in 08/17/18
    8034033900003
    [69] † Pisanosaurus mertii
    Last Modified in 08/17/18
    331888800003
    [70] † Heterodontosaurus tucki
    Last Modified in 08/17/18
    7434634401003
    [71] † Lesothosaurus diagnosticus
    Last Modified in 08/17/18
    8833133001003
    [72] † Scutellosaurus lawleri
    Last Modified in 08/17/18
    24817117001003
    [73] † Herrerasaurus ischigualastensis
    Last Modified in 08/17/18
    6934934901003
    [74] † Staurikosaurus pricei
    Last Modified in 08/17/18
    30111711701003
    [75] † Eoraptor lunensis
    Last Modified in 08/17/18
    13428528401003
    [76] † Saturnalia tupiniquim
    Last Modified in 08/17/18
    22219619601003
    [77] † Plateosaurus engelhardti
    Last Modified in 08/17/18
    3038838801003
    [78] † Efraasia minor
    Last Modified in 08/17/18
    9532332301003
    [79] † Tawa hallae
    Last Modified in 08/17/18
    7134734701003
    [80] † Coelophysis bauri
    Last Modified in 08/17/18
    5236636601003
    [81] † Dilophosaurus wetherelli
    Last Modified in 08/17/18
    7634234201003
    [82] † Allosaurus fragilis
    Last Modified in 08/17/18
    4137737701003
    [83] † Velociraptor mongoliensis
    Last Modified in 08/17/18
    8333633501003
    [84] † Parringtonia gracilis
    Last Modified in 08/17/18
    381383800003
    [85] † Erpetosuchus granti
    Last Modified in 08/17/18
    26615315300003
    [86] † Asilisaurus kongwe
    Last Modified in 08/17/18
    227177177015003
    [87] † Asilisaurus kongwe skeleton
    Last Modified in 08/17/18
    165238238016003
    [88] † Asilisaurus kongwe combined
    Last Modified in 08/17/18
    136268267016003
    [89] † Teleocrater holotype
    Last Modified in 08/17/18
    338818100003
    [90] † Teleocrater 2015 quarry
    Last Modified in 08/17/18
    25816116100003
    [91] † Teleocrater combined
    Last Modified in 08/17/18
    24817117100003
    [92] † Dongusuchus efremovi
    Last Modified in 08/17/18
    391282800003
    [93] † Spondylosoma absconditum
    Last Modified in 08/17/18
    382373700003
    [94] † Yarasuchus deccanensis
    Last Modified in 08/17/18
    28712912903003
    [95] † Scleromochlus taylori
    Last Modified in 08/17/18
    334858500003


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    Matrix downloads15Nesbitt et al. 2017 Teleocrater matrix Nesbitt 2011 dataset final with Scleromochlus (15 downloads);