Describer

Zanno, Gillette, Albright & Titus 2009

Time

Cretaceous Late Turonian

Classification

Saurischia Theropoda Tetanurae Coelurosauria Therizinosauroidea

Diet

?

Fossilsite

Tropic Shale, Kane County, Utah, US

Fall under

Nothronychus mckinleyi

Info

Nothronychus mckinleyi (Kirkland & Wolfe, 2001) > Nothronychus graffami (Zanno, Gillette, Albright & Titus 2009)

Holotype

UMNH VP 16420, nearly complete postcranial skeleton

Etymology

In honour of M. Graffam who discovered the holotype.

Locality and horizon

Tropic Shale, 65 m above the local top of the Dakota Formation; lower portion of the Mammites nodosoides Ammonoid Biozone (Albright et al. 2007) (early Turonian), Kaiparowits Basin, Kane County, UT, USA.

Diagnosis

A therizinosaurid with the following autapomorphies:pubic boot with diminutive caudal process; ventral margin of pubic boot dorsally convex; subtriangular caudal process of ischium diminutive (less than 5% of the total length of ischium); and caudal process of ischium located proximal to obturator foramen.

Nothronychus graffami can be differentiated from Nothronychus mckinleyi by the following five features: strongly amphicoelus cranial caudal centra; caudoventral aspect of caudal centra poorly developed; glenoid with pronounced caudal buttress; ulna straight; and ventral notch between obturator process and iliac shaft craniocaudally wide