Tawa hallae Nesbitt et al., 2009c

Nesbitt, Sterling J., 2011, The Early Evolution Of Archosaurs: Relationships And The Origin Of Major Clades, Bulletin of the American Museum of Natural History 2011 (352), pp. 1-292 : 55

Tawa hallae Nesbitt et al., 2009c (fig. 12E)

AGE: Middle Norian ( Litwin et al., 1991; Lucas, 1998; Heckert et al., 2005; Parker, 2006; Irmis et al., 2007). The HQ has been dated to,215 to 213 million years ago ( Mundil et al., 2008).

OCCURRENCE: Site 2, Hayden Quarry, Ghost Ranch, Rio Arriba County, New Mexico.

HOLOTYPE: GR 241, nearly complete, but disarticulated skull and most of an articulat- ed skeleton.

PARATYPES: see Nesbitt et al., (2009c).

REMARKS: A group of six to seven individuals of Tawa skeletons were found in a small area in an extensive multitaxic assemblage. The individuals differ in ontogenetic stage; the smallest fibula is 70% the length of the largest fibula. The well-preserved specimens vary in completeness, from isolated elements to nearly complete articulated skeletons. The skeletons have yet to be completely prepared, and a complete description of this important taxon is underway.