[D] Planicoxa venenica [sG] [T]
DiCroce & Carpenter, 2001
?Jurassic Late Cretaceous Early Kimmeridgian ?Tithonian Berriasian Valanginian Hauterivian Barremian
Ornithischia Ornithopoda Iguanodontia Camptosauridae
Cedar Mountain Formation, Poison Strip Member, \\\\\\\"Tony\\\\\\\'s Bone Bed\\\\\\\" Utah, US
This is a medium-size ?iguanodontid based on a type ilium and numerous referred specimens (girdle and limb elements and vertebrae) found in association in a single quarry (\\\\\\\"Tony\\\\\\\'s Bone Bed\\\\\\\").
DMNH 24504 left ilium. Paratypes: One cervicalneural arch, DMNH 42511; seven dorsal vertebral arches, DMNH 42516, DMNH 42518, DMNH 42519, DMNH 42520, DMNH 42521, DMNH 42522 and DMNH 4252; three dorsal centra; DMNH 42513, DMNH 42515 and DMNH 42525; three dorsal rib fragments; DMNH 42523, DMNH 42526 and DMNH 42527; one sacral vertebra, DMNH 42510; two caudal centra, DMNH 42514 and DMNH 42517; left humerus (proximal end), DMNH 42508; left ulna, DMNH 42507; left femur, DMNH 42505; right femur, DMNH 40917; two right tibiae, DMNH 40914 and DMNH 40918; left tibia (distal end), DMNH 42506; left metatarsal II, DMNH 42509; and pedal phalanx, DMNH 42512.
Latin plani = \\\\\\\"flat/level\\\\\\\" and Latin coxa = \\\\\\\"hip\\\\\\\" (Planicoxa refers to the flat appereance of the ilium, the difining characteristic); Latin venencia = \\\\\\\"poison\\\\\\\" , in reference to the Poison Strip Sandstone Member of the Cedar Mountain Formation, where the discovery was made
Diagnosis of genus (as for the type species)
Caudals with paired ventral ridges connecting anterior and posterior chevron facets, humeral head extending onto anterior surface, postacetabular blade of ilium short and horizontal. (DiCrose & Carpenter, 2001)
Carpenter & Ishida (2010) Early and “Middle” Cretaceous Iguanodonts in Time and Space Journal of Iberian Geology 36 (2) 145-164
Planicoxa venenica Dicroce and Carpenter 2001
north of Moab, Utah, USA
Poison Strip Sandstone, Cedar Mountain Formation
Barremian (Zeigler et al. 2007; Ludvigson et al.,2009)
The ilium differs from that of Planicoxa depressus in its more arched dorsal margin, slightly better development of the suprailiac notch, and longer preacetabular process that is half the ilium length. The preacetabular notch is proportionally deeper as well. The ischial peduncle is expanded onto the lateral surface.