Euparkeria (Ewer, 1965)

Desojo, Julia B., Ezcurra, Martin D. & Schultz, Cesar L., 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), pp. 839-871 : 868

EUPARKERIA

Character 5: the external nares of Euparkeria are of marginal position, being widely visible in lateral view (SAM 5867), contrasting with the dorsal nares of proterochampsids, which are mostly obscured in lateral view (e.g. Chanaresuchus ; PULR 07). Thus, the character state (0) has been introduced instead of (1) in Euparkeria .

Character 7: in Euparkeria the suture between the premaxilla and maxilla does not exhibit a notch between these elements, but the contact between the bones is almost vertical and continuous along all of its extension. Accordingly, the character state of this feature has been changed to (0) instead of (1) (see also Nesbitt et al., 2009a: character 43).

Characters 45 and 46: Nesbitt et al. (2009a: character 25) discuss the presence of intercentra in the cervical and dorsal vertebrae of basal archosauriforms. They stated that the presence or not of intercentra could not be asserted in the axial skeleton of Euparkeria . Following these authors, we rescored the character states as a polymorphic (0/1) instead of (0) in the South African form.

Character 53: the second primordial sacral rib of Euparkeria exhibits a continuously convex lateral border in dorsal view (Ewer, 1965: fig. 8A–C), which is not bifurcated. Accordingly, this character has been codified as (1) instead of (0) in Euparkeria .

Character 74: following the discussion carried out by Nesbitt et al. (2009a) of the proportions of the calcaneal tuber shaft of Euparkeria , in which they described it as broader than tall, we changed the character state to (1) instead of (0).