Staurikosaurus pricei Colbert, 1970

Bittencourt, Jonathas De Souza & Kellner, Alexander Wilhelm Armin, 2009, The anatomy and phylogenetic position of the Triassic dinosaur Staurikosaurus pricei Colbert, 1970, Zootaxa 2079, pp. 1-56 : 3-4

publication ID	https://doi.org/ 10.5281/zenodo.187289
DOI	https://doi.org/10.5281/zenodo.6220557
persistent identifier	https://treatment.plazi.org/id/03BD5A05-FF9C-FFB3-FF35-25C5FD05FEDE
treatment provided by	Plazi
scientific name	Staurikosaurus pricei Colbert, 1970
status

Treatment

Figures 1–32 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 View FIGURE 5 View FIGURE 6 View FIGURE 7 View FIGURE 8 View FIGURE 9 View FIGURE 10 View FIGURE 11 View FIGURE 12 View FIGURE 13 View FIGURE 14 View FIGURE 15 View FIGURE 16 View FIGURE 17 View FIGURE 18 View FIGURE 19 View FIGURE 20 View FIGURE 21 View FIGURE 23 View FIGURE 24 View FIGURE 25 View FIGURE 26 View FIGURE 27 View FIGURE 28 View FIGURE 29 View FIGURE 30 View FIGURE 31 View FIGURE 32

Holotype. Incomplete skeleton ( MCZ 1669, Figs 1–32 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 View FIGURE 5 View FIGURE 6 View FIGURE 7 View FIGURE 8 View FIGURE 9 View FIGURE 10 View FIGURE 11 View FIGURE 12 View FIGURE 13 View FIGURE 14 View FIGURE 15 View FIGURE 16 View FIGURE 17 View FIGURE 18 View FIGURE 19 View FIGURE 20 View FIGURE 21 View FIGURE 23 View FIGURE 24 View FIGURE 25 View FIGURE 26 View FIGURE 27 View FIGURE 28 View FIGURE 29 View FIGURE 30 View FIGURE 31 View FIGURE 32 ), housed in the Museum of Comparative Zoology, Harvard University, comprising: both mandibular rami with fragments of teeth in situ; six cervical, 15 dorsal, three sacral, and 34 caudal vertebrae; rib fragments; distal left scapula; ilia, ischia, and pubes; femora, tibiae, and fibulae; several unidentified fragments. A cast (MN 6104-V) is housed at the Museu Nacional/ UFRJ, in Rio de Janeiro, Brazil.

Type locality. An outcrop of the Alemoa Member, Santa Maria Formation (Carnian), locality Sanga Grande, city of Santa Maria, Rio Grande do Sul, Brazil.

Revised diagnosis. Saurischian dinosaur distinguished by the following autapomorphies: 1) craniomedial region of the distal pubis is distinctly beveled (Novas 1993; Figs 22–23); 2) femoral cranial trochanter reduced in size ( Fig. 27 View FIGURE 27 ); 3) distal end of tibia is subcircular in distal view (modified from Rauhut 2003; Fig. 28 View FIGURE 28 g); 4) dorsoventrally oriented sulcus present on the medial surface of the proximal third of fibula ( Fig. 30 View FIGURE 30 c–d).

Comments. Rauhut (2003) proposed two additional autapomorphies for S. pricei : postacetabular process of ilium abbreviated and caudally straight; pubic boot confluent with pubic shafts caudally. These proposed autapomorphies are problematic because the postacetabular iliac process is also short in several primitive dinosaurs, including H. ischigualastensis ; moreover, in S. pricei the process is rounded rather than straight caudally. The configuration of the pubic boot identified as autapomorphic by Rauhut (2003) is also present in H. ischigualastensis ( Langer & Benton 2006) .