Megapnosaurus

Description

Megapnosaurus est un genre éteint de dinosaures théropodes de la famille des Coelophysidae ayant vécu au cours du Jurassique inférieur. Il était appelé à l'origine Syntarsus. La validité du genre Megapnosaurus est fortement contestée par de nombreux paléontologues qui le considèrent comme un synonyme junior du genre Coelophysis.
Des études récentes, de E. M. Bordy (2021) et L. Sciscio et al. (2021), confirment Megapnosaurus comme genre valide et Megapnosaurus rhodesiensis comme espèce valide.

Information(s)

Source: The Paleobiology Database

Attibution: Ivie et al. 2001²⁴⁴⁰⁴
Statut: Valide
Nom commun:
Environnement de découverte: terrestrial
Mode de vie: terrestrial
Mode de locomotion: actively mobile
Vision: ?
Alimentation: carnivore
Mode de reprodution: oviparous, dispersal=direct/internal,mobile
Classification: Coelophysidae >> Coelophysoidea >> Neotheropoda >> Theropoda >> Dinosauria
Période: Hettangian - Sinemurian (de -201.40 Ma à -192.90 Ma)

Espèce(s):
- Megapnosaurus rhodesiensis (Valide)¹²⁹²⁷

Specimen(s):

Syntarsus rhodesiensis recombined as Megapnosaurus rhodesiensis: holotype QG 1 - fibula, tibia, femur, ulna, radius, humerus, scapulacoracoid, skull
Megapnosaurus kayentakatae recombined as Syntarsus kayentakatae: holotype TMM 43688-1 - femur, femur
Megapnosaurus kayentakatae recombined as Syntarsus kayentakatae: holotype MNA V2623 - fibula, tibia, femur
Détail des Spécimens

Autre(s) Taxon(s) trouvés dans la litterature:
- Megapnosaurus
- Syntarsus rhodesiensis recombined as Megapnosaurus rhodesiensis
Découverte(s): 8 occcurrences
Ouvrir - Fermer
- Chine
  - Yunnan
    - ?
      - Formation Lufeng
        Megapnosaurus: ? ²⁴⁴⁰⁴
- États-Unis
  - Utah
    - Washington
      - Formation Moenave
        Megapnosaurus: ? ⁵¹⁴⁶⁰
- Afrique du Sud
  - Free State
    - Ladybrand
      - Formation Elliot
        Megapnosaurus rhodesiensis identifié comme Syntarsus rhodesiensis: ? ¹¹⁹⁴⁵
- Zimbabwe
  - Mashonaland North
    - ?
      - Formation Forest Sandstone
        Megapnosaurus rhodesiensis identifié comme Syntarsus rhodesiensis: ? ¹³⁵⁷⁹
  - Matabeleland North
    - Nyamandhlovu
      - Formation Forest Sandstone
        Megapnosaurus rhodesiensis identifié comme n. gen. Syntarsus n. sp. rhodesiensis: QG 1: fibula, tibia, femur, ulna, radius, humerus, scapulacoracoid, skull ¹²⁹²⁷
        Megapnosaurus rhodesiensis identifié comme Syntarsus rhodesiensis: ? ⁵⁹²⁵
        Megapnosaurus rhodesiensis identifié comme Syntarsus rhodesiensis: ? ⁶³⁴³⁵
      - Formation Nyamandhlovu Sandstones
        Megapnosaurus rhodesiensis identifié comme Syntarsus rhodesiensis: ? ⁹²⁷⁸
Historique des modifications:

Référence	Type	Partie	Dimension (en cm)	Lieu de découverte
QG 1	holotype	fibula	length: 208	Collection: Kwengula stream, Southcote Farm- Lieu: ZW, Matabeleland North, Nyamandhlovu
QG 1	holotype	tibia	length: 223	Collection: Kwengula stream, Southcote Farm- Lieu: ZW, Matabeleland North, Nyamandhlovu
QG 1	holotype	femur	length: 208	Collection: Kwengula stream, Southcote Farm- Lieu: ZW, Matabeleland North, Nyamandhlovu
QG 1	holotype	ulna	length: 77	Collection: Kwengula stream, Southcote Farm- Lieu: ZW, Matabeleland North, Nyamandhlovu
QG 1	holotype	radius	length: 61	Collection: Kwengula stream, Southcote Farm- Lieu: ZW, Matabeleland North, Nyamandhlovu
QG 1	holotype	humerus	length: 100	Collection: Kwengula stream, Southcote Farm- Lieu: ZW, Matabeleland North, Nyamandhlovu
QG 1	holotype	scapulacoracoid	length: 130	Collection: Kwengula stream, Southcote Farm- Lieu: ZW, Matabeleland North, Nyamandhlovu
QG 1	holotype	skull	length: 210	Collection: Kwengula stream, Southcote Farm- Lieu: ZW, Matabeleland North, Nyamandhlovu
TMM 43688-1	holotype	femur	length: 230	Collection: Kwengula stream, Southcote Farm- Lieu: ZW, Matabeleland North, Nyamandhlovu
TMM 43688-1	holotype	femur	length: 229	Collection: Kwengula stream, Southcote Farm- Lieu: ZW, Matabeleland North, Nyamandhlovu
MNA V2623	holotype	fibula	length: 274	Collection: Kwengula stream, Southcote Farm- Lieu: ZW, Matabeleland North, Nyamandhlovu
MNA V2623	holotype	tibia	length: 292	Collection: Kwengula stream, Southcote Farm- Lieu: ZW, Matabeleland North, Nyamandhlovu
MNA V2623	holotype	femur	length: 276	Collection: Kwengula stream, Southcote Farm- Lieu: ZW, Matabeleland North, Nyamandhlovu

Pas de modification récente.

Publication(s)

La base comprend 8 publication(s).

Source: The Paleobiology Database

↑^{1 2}R. B. Irmis. 2004. First report of Megapnosaurus (Theropoda: Coelophysoidea) from China. PaleoBios 24(3):11-18
↑^{1 2}M. A. Raath. 1969. A new coelurosaurian dinosaur from the Forest Sandstone of Rhodesia. Arnoldia (Rhodesia) 4(28):1-254
↑¹A. R. C. Milner and M. G. Lockley. 2006. History, geology and paleontology: St. George Dinosaur Discovery Site at Johnson Farm, Utah. Making Tracks Across the Southwest: The 2006 Desert Symposium
↑¹D. Munyikwa and M. A. Raath. 1999. Further material of the ceratosaurian dinosaur Syntarsus from the Elliot Formation (Early Jurassic) of South Africa. Palaeontologia Africana 35:55-59
↑¹M. A. Raath. 1990. Morphological variation in small theropods and its meaning in systematics: evidence from Syntarsus rhodesiensis. Dinosaur Systematics: Perspectives and Approaches, Cambridge University Press, Cambridge (https://doi.org/10.1017/cbo9780511608377.010)
↑¹M. A. Raath. 1977. The Anatomy of the Triassic Theropod Syntarsus rhodesiensis (Saurischia: Podokesauridae) and a Consideration of Its Biology. Department of Zoology and Entomology, Rhodes University, Salisbury, Rhodesia
↑¹G. Bond. 1972. Milestones in Rhodesian paleontology (1901–1971). Transactions of the Geological Society of South Africa 75(2):151-158
↑¹M. A. Raath. 1972. First record of dinosaur footprints from Rhodesia. Arnoldia 5(37):1-5

Galerie d'images

Source: Wikimédia

Megapnosaurus kayentakae (Syntarsus) feeding on Scutellosaurus