Doswelliidae
Doswelliidae is a family of carnivore archosauriforms. Doswelliids existed in North and South America during the Middle–Late Triassic period and were among the most derived non-archosaurian archosauriforms. The family was named by R. E. Weems in 1980 and it has been placed in its own suborder, Doswelliina.[1]
The Doswelliidae has long been considered a monospecific family of basal archosauriforms represented by Doswellia kaltenbachi from the Late Triassic of North America. However, a 2011 cladistic analysis recovered Archeopelta, Doswellia and Tarjadia within a monophyletic Doswelliidae. The phylogenetic analysis also indicates that Doswellidae is the closest large monophyletic clade to Archosauria (only the Chinese archosauriform Yonghesuchus nested closer to archosaurs).[2] In 2013, the fourth and fifth genera and species of dosweliids were named, Jaxtasuchus salomoni based on several skeletons found in the Ladinian-age Lower Keuper of Germany,[3] and Ankylosuchus chinlegroupensis based on fragments of four vertebrae, parts of the skull and of a limb bone from the early Carnian Colorado City Formation.[4] Both Ankylosuchus and Jaxtasuchus are more closely related to Doswellia than to more basal doswelliids.[3][4] A phylogenetic analysis by Ezcurra (2016) recovered Doswelliidae within Proterochampsia, which was found to be the sister taxon of Archosauria. The aquatic Vancleavea was also referred to Doswelliidae.[5]
References
- ↑ R. E. Weems (1980). "An unusual newly discovered archosaur from the Upper Triassic of Virginia, U.S.A.". Transactions of the American Philosophical Society, New Series. 70 (7): 1–53. doi:10.2307/1006472.
- ↑ Julia B. Desojo; Martin D. Ezcurra; Cesar L. Schultz (2011). "An unusual new archosauriform from the Middle–Late Triassic of southern Brazil and the monophyly of Doswelliidae". Zoological Journal of the Linnean Society. 161 (4): 839–871. doi:10.1111/j.1096-3642.2010.00655.x.
- 1 2 Schoch, R. R.; Sues, H. D. (2013). "A new archosauriform reptile from the Middle Triassic (Ladinian) of Germany". Journal of Systematic Palaeontology: 1. doi:10.1080/14772019.2013.781066.
- 1 2 Lucas, S.G.; Spielmann, J.A.; Hunt, A.P. (2013). "A new doswelliid archosauromorph from the Upper Triassic of West Texas" (PDF). In Tanner, L.H.; Spielmann, J.A.; and Lucas, S.G. (eds.). The Triassic System. New Mexico Museum of Natural History and Science Bulletin. 61. pp. 382–388.
- ↑ Ezcurra MD. (2016) The phylogenetic relationships of basal archosauromorphs, with an emphasis on the systematics of proterosuchian archosauriforms. PeerJ, 4:e1778
