Temporal range: ?Middle Triassic – Late Triassic, ?245–203 Ma
PreꞒ
Ꞓ
O
S
D
C
P
T
J
K
Pg
N
Scientific classification
Domain:
Eukaryota
Kingdom:
Animalia
Phylum:
Chordata
Clade:
Archosauria
Clade:
Avemetatarsalia
Clade:
Ornithodira
Clade:
Dinosauromorpha
Clade:
Dinosauriformes
Clade:
Dracohors
Family:
†Silesauridae Langer et al., 2010
Subgroups
†Agnosphitys?
†Amanasaurus
†Asilisaurus?
†Gamatavus?
†Ignotosaurus
†Lewisuchus?
†Pisanosaurus?
†Soumyasaurus?
†Sulcimentisauria Martz & Small, 2019
†Diodorus?
†Eucoelophysis?
†Kwanasaurus?
†Lutungutali?
†Sacisaurus?
†Silesaurus
†Technosaurus?
Silesauridae is an extinct family of Triassic dinosauriforms. It is most commonly considered to be a clade of non-dinosaur dinosauriforms, and the sister group of dinosaurs.[1][2][3][4][5] Some studies have instead suggested that most or all silesaurids comprised an early diverging clade or a paraphyletic grade within ornithischian dinosaurs.[6][7][8][9] Silesaurids have a consistent general body plan, with a fairly long neck and legs and possibly quadrupedal habits, but most silesaurids are heavily fragmentary nonetheless. Furthermore, they occupied a variety of ecological niches, with early silesaurids (such as Lewisuchus)[10] being carnivorous and later taxa (such as Kwanasaurus)[11] having adaptations for specialized herbivory. As indicated by the contents of referred coprolites, Silesaurus may have been insectivorous, feeding selectively on small beetles and other arthropods.[12]
^Nesbitt, S.J. (2011). "The early evolution of archosaurs: relationships and the origin of major clades". Bulletin of the American Museum of Natural History. 352: 1–292. doi:10.1206/352.1. hdl:2246/6112. S2CID 83493714.
^Cite error: The named reference Kammereretal2012 was invoked but never defined (see the help page).
^Cite error: The named reference Ornithoscelida was invoked but never defined (see the help page).
^Andrea Cau (2018). "The assembly of the avian body plan: a 160-million-year long process" (PDF). Bollettino della Società Paleontologica Italiana. 57 (1): 1–25. doi:10.4435/BSPI.2018.01.
^Ferigolo, Jorge; Langer, Max C. (1 January 2007). "A Late Triassic dinosauriform from south Brazil and the origin of the ornithischian predentary bone". Historical Biology. 19 (1): 23–33. doi:10.1080/08912960600845767. ISSN 0891-2963. S2CID 85819339.
^Langer, Max C.; Ferigolo, Jorge (1 January 2013). "The Late Triassic dinosauromorph Sacisaurus agudoensis (Caturrita Formation; Rio Grande do Sul, Brazil): anatomy and affinities". Geological Society, London, Special Publications. 379 (1): 353–392. Bibcode:2013GSLSP.379..353L. doi:10.1144/SP379.16. ISSN 0305-8719. S2CID 131414332.
^Cabreira, S.F.; Kellner, A.W.A.; Dias-da-Silva, S.; da Silva, L.R.; Bronzati, M.; de Almeida Marsola, J.C.; Müller, R.T.; de Souza Bittencourt, J.; Batista, B.J.; Raugust, T.; Carrilho, R.; Brodt, A.; Langer, M.C. (2016). "A Unique Late Triassic Dinosauromorph Assemblage Reveals Dinosaur Ancestral Anatomy and Diet". Current Biology. 26 (22): 3090–3095. doi:10.1016/j.cub.2016.09.040. PMID 27839975.
^Müller, Rodrigo Temp; Garcia, Maurício Silva (26 August 2020). "A paraphyletic 'Silesauridae' as an alternative hypothesis for the initial radiation of ornithischian dinosaurs". Biology Letters. 16 (8): 20200417. doi:10.1098/rsbl.2020.0417. PMC 7480155. PMID 32842895.
^Ezcurra, Martín D.; Nesbitt, Sterling J.; Fiorelli, Lucas E.; Desojo, Julia B. (24 August 2019). "New specimen sheds light on the anatomy and taxonomy of the early Late Triassic dinosauriforms from the Chañares Formation, NW Argentina". The Anatomical Record. 303 (5): 1393–1438. doi:10.1002/ar.24243. hdl:11336/129047. ISSN 1932-8494. PMID 31444989.
^Martz, Jeffrey W.; Small, Bryan J. (3 September 2019). "Non-dinosaurian dinosauromorphs from the Chinle Formation (Upper Triassic) of the Eagle Basin, northern Colorado: Dromomeron romeri (Lagerpetidae) and a new taxon, Kwanasaurus williamparkeri (Silesauridae)". PeerJ. 7: e7551. doi:10.7717/peerj.7551. ISSN 2167-8359. PMC 6730537. PMID 31534843.
^Martin Qvarnström; Joel Vikberg Wernström; Rafał Piechowski; Mateusz Tałanda; Per E. Ahlberg; Grzegorz Niedźwiedzki (2019). "Beetle-bearing coprolites possibly reveal the diet of a Late Triassic dinosauriform". Royal Society Open Science. 6 (3): Article ID 181042. Bibcode:2019RSOS....681042Q. doi:10.1098/rsos.181042. PMC 6458417. PMID 31031991.
Silesauridae is an extinct family of Triassic dinosauriforms. It is most commonly considered to be a clade of non-dinosaur dinosauriforms, and the sister...
draco and cohors. Under parsimony results, Dracohors included only Silesauridae and Dinosauria, the latter including the groups Herrerasauria, Sauropodomorpha...
and Paul Barrett (2017) recovered Agnosphitys as a member of the clade Silesauridae. Langer, 2004. Basal Saurischia. In Weishampel, Dodson and Osmolska....
the relationships of primitive taxa like Pisanosaurus and members of Silesauridae may sometimes be found to be ornithischians outside this core grouping...
jsames.2021.103341. Müller, R.T.; Garcia, M.S. (2020). "A paraphyletic 'Silesauridae' as an alternative hypothesis for the initial radiation of ornithischian...
below the femur's head. Within the clade Silesauridae, Diodorus has been grouped in Sulcimentisauria. Silesauridae is generally considered a sister group...
Infrasubdivision Ornithodira Order Pterosauria † Family Lagerpetidae † Family Silesauridae † (Superorder) Clade Dinosauria – dinosaurs Order Ornithischia † (Order)...
Rodrigo Temp; Garcia, Maurício Silva (August 26, 2020). "A paraphyletic 'Silesauridae' as an alternative hypothesis for the initial radiation of ornithischian...
J. Nesbitt, and Neil H. Shubin (2011) The first basal dinosauriform (Silesauridae) from the Late Triassic of Morocco. Acta Palaeontologica Polonica (in...
and both were found to be basal members of the recently named family Silesauridae. Many other studies supported these arguments, sometimes even scoring...
Rodrigo Temp; Garcia, Maurício Silva (August 2020). "A paraphyletic 'Silesauridae' as an alternative hypothesis for the initial radiation of ornithischian...
Ignotosaurus shifts to a polytomy with dinosaurs and other silesaurids, while Silesauridae starts with Lewisuchus at the base, followed by Soumyasaurus and Asilisaurus...
silesaurids as a whole, a situation which has invited much debate. While Silesauridae is often considered a monophyletic sister group of dinosaurs, some studies...
recovered Soumyasaurus as a silesaurid, however its relationships amongst Silesauridae were unresolved. The coeval Technosaurus was not included in this analysis...
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