Pronunciation: ko-LEE-pee-o-SEF-uh-lee
Meaning: Knucklehead
Author/s: Sullivan (2003)
Synonyms: Stegoceras lambei
First Discovery: Alberta, Canada
Acta Ordinal: #519
Colepiocephale lambei
(Lambe's Knuckle Head)Etymology
Colepiocephale is derived from the Latin "colepium" (knuckle, specifically a knuckle of beef or pork) and the Greek "cephale" (head), referring to the down-turned knuckle-like shape of the rear part of its skull dome when viewed from the side. The species epithet, lambei (LAM-bye), honours Canadian palaeontologist Lawrence Lambe who found the first fossils of Stegoceras in 1898. Colepiocephale lambei was initially assigned to Stegoceras as Stegoceras lambei by Sternberg in 1945.
Discovery
Although originally reported as coming from the Oldman Formation, the remains of Colepiocephale were discovered in what is now the Foremost Formation (Belly River Group), South Saskatchewan River, 3 miles below Bow Island Ferry, Alberta, Canada, by E. J. Whittaker in 1923. The holotype (CMN 8818) is a nearly complete adult skull dome. Holotype aside, thirty-one specimens, consisting entirely of skull domes and /or dome fragments, have been referred to Colepiocephale, and all come from localities in the Foremost Formation of Alberta, Canada... apart from one. Kennedy Coulee:
MP 130048.
Collected from UCMP locality V82179, a shell bed in the Judith River Formation of Montana, USA. This is the only specimen from outside of Alberta. Chin Lake:
CMN 9952 Chin Coulee:
CMN 29419, CMN 29420, CMN 29421, CMN 52846, CMN 52847, ROM 3632, TMP 86.0.11, TMP 86.0.12, TMP 86.146.1, TMP 86.146.2, TMP 86.146.3, TMP 86.146.4, TMP 86.146.5, TMP 86.146.6, TMP 86.146.7, TMP 87.7.1, TMP 87.7.2, TMP 87.7.3, TMP 97.99.2, TMP 97.99.3, and TMP SA 2008.01 (Top of Taber Coal Zone) Philps Coulee:
TMP 70.2.1 Junction of the Bow and Oldman Rivers (on the south bank, 150 ft below prairie level):
TMP 82.46.1 Grassy Lake:
TMP 92.88.1 Pinhorn Ranch:
TMP 99.31.1, TMP 99.31.2, TMP 2000.57.1 Near the town of Milk River (just above McKay Coal seam):
UALVP 349 White Rock Coulee:
UALVP 31471
• Schott RK, Evans DC, Williamson TE, Carr TD and Goodwin MB (2009) "The anatomy and systematics of Colepiocephale lambei (Dinosauria: Pachycephalosauridae)". 
