Project 3249: R. J. Butler, S. J. Nesbitt, A. J. Charig, D. J. Gower, P. M. Barrett. 2017. Mandasuchus tanyauchen, gen. et sp. nov., a pseudosuchian archosaur from the Manda Beds (?Middle Triassic) of Tanzania. Journal of Vertebrate Paleontology. 37 (sup1):96-121.
Specimen: † Mandasuchus (unvouchered)
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Abstract

The diverse assemblage of extinct archosaur species known from the Manda Beds of Tanzania has provided key insights into the timing and tempo of the early part of the archosaur radiation during the Middle Triassic. Several archosaur specimens were collected from the Manda Beds in 1933 by F. R. Parrington, and three of these were subsequently described and made the basis of a new genus, 'Mandasuchus,' in a 1956 doctoral dissertation. However, this important fossil material was never formally published, and >60 years later 'Mandasuchus' and 'Mandasuchus tanyauchen' remain nomina nuda, despite frequent references to them in the literature. Here, we provide a detailed description of this material, provide the first formal diagnosis of Mandasuchus tanyauchen, gen. et sp. nov., and assess its phylogenetic position. The holotype of M. tanyauchen includes a well-preserved partial postcranial skeleton and fragmentary cranial remains. Four referred specimens include two partial skeletons, consisting primary of postcranial remains, a partial maxilla that was previously assigned to the dinosaur clade Saurischia, and a well-preserved astragalus and calcaneum that may belong to the holotype individual. Mandasuchus tanyauchen is diagnosed by a unique combination of character states, as well as by two possible autapomorphies (ascending process of maxilla thin and compressed from anterolateral to posteromedial; femur with distinct pit lateral to the distal-most expression of the posteromedial tuber). Our phylogenetic analysis recovered M. tanyauchen within Paracrocodylomorpha, as the sister taxon to all other sampled members of Loricata.


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Article DOI: 10.1080/02724634.2017.1343728

Project DOI: 10.7934/P3249, http://dx.doi.org/10.7934/P3249
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 89 Taxa
  • 1 Specimen
  • 413 Characters
Total size of project's media files: 5 MB

Download Project SDD File
Total scored cells: 21284
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 413
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 952
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:413/0
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MorphoBank Project 3249

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    Tanya Berardini
    Project Administrator
    Last logged in 08/17/18
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    Richard Butler
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    Taxonomic Overview for Matrix 'M25590' (89 Taxa)

    taxon unscored
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    [1] † Mesosuchus browni
    Last Modified in 08/17/18
    8333033000002
    [2] † Prolacerta broomi
    Last Modified in 08/17/18
    5635735700002
    [3] † Archosaurus rossicus
    Last Modified in 08/17/18
    4085500002
    [4] † Proterosuchus fergusi
    Last Modified in 08/17/18
    4936436400002
    [5] † Erythrosuchus africanus
    Last Modified in 08/17/18
    5036336300002
    [6] † Vancleavea campi
    Last Modified in 08/17/18
    13228128100002
    [7] † Chanaresuchus bonapartei
    Last Modified in 08/17/18
    5336136000002
    [8] † Tropidosuchus romeri
    Last Modified in 08/17/18
    10131331200002
    [9] † Euparkeria capensis
    Last Modified in 08/17/18
    1839639500002
    [10] † Parasuchus hislopi
    Last Modified in 08/17/18
    6634734700002
    [11] † Smilosuchus gregorii
    Last Modified in 08/17/18
    7533833800002
    [12] † Pseudopalatus pristinus
    Last Modified in 08/17/18
    3238138100002
    [13] † Gracilisuchus stipanicicorum
    Last Modified in 08/17/18
    10531230701002
    [14] † Turfanosuchus dabanensis
    Last Modified in 08/17/18
    14626826700002
    [15] † Yonghesuchus sangbiensis
    Last Modified in 08/17/18
    322919001002
    [16] † Ornithosuchus longidens
    Last Modified in 08/17/18
    14027327300002
    [17] † Riojasuchus tenuisceps
    Last Modified in 08/17/18
    6135235200002
    [18] † Revueltosaurus callenderi
    Last Modified in 08/17/18
    4636736700002
    [19] † Stagonolepis robertsoni
    Last Modified in 08/17/18
    10031331300002
    [20] † Aetosaurus ferratus
    Last Modified in 08/17/18
    14826626500002
    [21] † Longosuchus meadei
    Last Modified in 08/17/18
    6934434400002
    [22] † Ticinosuchus ferox
    Last Modified in 08/17/18
    21220120100002
    [23] † Qianosuchus mixtus
    Last Modified in 08/17/18
    13128228200002
    [24] † Xilousuchus sapingensis
    Last Modified in 08/17/18
    29511811800002
    [25] † Arizonasaurus babbitti
    Last Modified in 08/17/18
    16025325300002
    [26] † Poposaurus gracilis holotype
    Last Modified in 08/17/18
    375383800002
    [27] † Poposaurus gracilis yale
    Last Modified in 08/17/18
    20121321200002
    [28] † Lotosaurus adentus
    Last Modified in 08/17/18
    10331031000002
    [29] † Sillosuchus longicervix
    Last Modified in 08/17/18
    335787800002
    [30] † Effigia okeeffeae
    Last Modified in 08/17/18
    9831531500002
    [31] † Shuvosaurus inexpectatus
    Last Modified in 08/17/18
    10630730700002
    [32] † Prestosuchus chiniquensis
    Last Modified in 08/17/18
    24416916900002
    [33] † UFRGS 0156 t
    Last Modified in 08/17/18
    24616716700002
    [34] † UFRGS 152 t
    Last Modified in 08/17/18
    14926426400002
    [35] † Combined prestosuchus
    Last Modified in 08/17/18
    6035335300002
    [36] † Saurosuchus galilei
    Last Modified in 08/17/18
    10430930900002
    [37] † Batrachotomus kuperferzellensis
    Last Modified in 08/17/18
    6335035000002
    [38] † Fasolasuchus tenax
    Last Modified in 08/17/18
    25216116100002
    [39] † Rauisuchus triradentes
    Last Modified in 08/17/18
    29511811800002
    [40] † Polonosuchus silesiacus
    Last Modified in 08/17/18
    29511811800002
    [41] † Postosuchus kirkpatricki
    Last Modified in 08/17/18
    7633733700002
    [42] † Postosuchus alisonae
    Last Modified in 08/17/18
    24516816800002
    [43] † CM 73372
    Last Modified in 08/17/18
    25216116100002
    [44] † Hesperosuchus agilis holotype
    Last Modified in 08/17/18
    19921421400002
    [45] † Dromicosuchus grallator
    Last Modified in 08/17/18
    14327027000002
    [46] † Hesperosuchus agilis cm
    Last Modified in 08/17/18
    12528828800002
    [47] † Dibothrosuchus elaphros
    Last Modified in 08/17/18
    19521821800002
    [48] † Terrestrisuchus gracilis
    Last Modified in 08/17/18
    9631731700002
    [49] † Sphenosuchus acutus
    Last Modified in 08/17/18
    19721621600002
    [50] † Litargosuchus leptorhynchus
    Last Modified in 08/17/18
    22319019000002
    [51] † Kayentasuchus walkeri
    Last Modified in 08/17/18
    30610710700002
    [52] † Orthosuchus stormbergi
    Last Modified in 08/17/18
    9332032000002
    [53] Alligator mississippiensis
    Last Modified in 08/17/18
    4636936700002
    [54] † Protosuchus haughtoni
    Last Modified in 08/17/18
    25415915900002
    [55] † Protosuchus richardsoni
    Last Modified in 08/17/18
    5336036000002
    [56] † Eudimorphodon ranzii
    Last Modified in 08/17/18
    22119219200002
    [57] † Dimorphodon macronyx
    Last Modified in 08/17/18
    21220120100002
    [58] † Lagerpeton chanarensis
    Last Modified in 08/17/18
    28013313300002
    [59] † Dromomeron gregorii
    Last Modified in 08/17/18
    371424200002
    [60] † Dromomeron romeri
    Last Modified in 08/17/18
    352616100002
    [61] † Marasuchus lilloensis
    Last Modified in 08/17/18
    21020320300002
    [62] † Asilisaurus kongwe
    Last Modified in 08/17/18
    23917417400002
    [63] † Eucoelophysis baldwini
    Last Modified in 08/17/18
    387262600002
    [64] † Sacisaurus agudoensis
    Last Modified in 08/17/18
    322919100002
    [65] † Lewisuchus admixtus
    Last Modified in 08/17/18
    28313013000002
    [66] † Pseudolagosuchus majori
    Last Modified in 08/17/18
    318959500002
    [67] † Lewisuchus pseudolagosuchus
    Last Modified in 08/17/18
    18922422400002
    [68] † Eocursor parvus
    Last Modified in 08/17/18
    27314014000002
    [69] † Silesaurus opolensis
    Last Modified in 08/17/18
    8033433300002
    [70] † Pisanosaurus mertii
    Last Modified in 08/17/18
    325888800002
    [71] † Heterodontosaurus tucki
    Last Modified in 08/17/18
    7234334100002
    [72] † Lesothosaurus diagnosticus
    Last Modified in 08/17/18
    8532932800002
    [73] † Scutellosaurus lawleri
    Last Modified in 08/17/18
    24616816700002
    [74] † Herrerasaurus ischigualastensis
    Last Modified in 08/17/18
    6934434400002
    [75] † Staurikosaurus pricei
    Last Modified in 08/17/18
    29811511500002
    [76] † Eoraptor lunensis
    Last Modified in 08/17/18
    13128328200002
    [77] † Saturnalia tupiniquim
    Last Modified in 08/17/18
    22119219200002
    [78] † Plateosaurus engelhardti
    Last Modified in 08/17/18
    3038338300002
    [79] † Efraasia minor
    Last Modified in 08/17/18
    9531831800002
    [80] † Tawa hallae
    Last Modified in 08/17/18
    7034334300002
    [81] † Coelophysis bauri
    Last Modified in 08/17/18
    5236136100002
    [82] † Dilophosaurus wetherelli
    Last Modified in 08/17/18
    7633733700002
    [83] † Allosaurus fragilis
    Last Modified in 08/17/18
    4137237200002
    [84] † Velociraptor mongoliensis
    Last Modified in 08/17/18
    7833633500002
    [85] † Parringtonia gracilis
    Last Modified in 08/17/18
    376373700002
    [86] † Erpetosuchus granti
    Last Modified in 08/17/18
    26115215200002
    [87] † Mandasuchus
    Last Modified in 08/17/18
    26614514403002
    [88] † Mandasuchus total
    Last Modified in 08/17/18
    26214914803002
    [89] † Nundasuchus
    Last Modified in 08/17/18
    21819119104002


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