[D] Cedarpelta bilbeyhallorum [Su] [sG] [T]
Carpenter, Kirkland, Burge & Bird, 2001
Cretaceous Early Aptian Albian
Ornithischia Thyreophora Eurypoda Ankylosauria
Cedar Mountain Formation, Utah, US
10 meter (skull length 60 cm)
Genus - Typespecies - Skull
Cedarpelta bilbeyhallorum (Carpenter, Kirkland, Burge & Bird, 2001) > Bilbeyhallorum (Burge, Bird, McClelland & Cicconetti, 1999)
A primitive ankylosaurid. This is the name of one of two kinds of very large ankylosaurs from the Cedar Mountain Formation of Utah, known from a juvenile and an adult from the same quarry, and two more adults found close by. The estimated adult length is 10m (30+ feet).
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CEUM 12360, partial skull, including possible rear portion of paietal, missing lower jaws, discovered by Evan Hall and Sua Ann Blibey in the Ruby Ranch Member of the Cedar Mountain Formation, on the north end of the San Rafael Swell, in Carbon County, southeast of Price in eastern Utah.
Two skulls, one moderately disarticulated. miscellaneous postcranial remains, including elements from most areas of skelelton; armor.
Diagnoses of genus (as for the typespecies)
Premaxilla having short rostrum rostral to nasal process; paired premaxillae parallel-sided, not divergent posterodorsally (as in other ankylosaurids); cutting edge of beak restricted to craniomost portion of premaxillae; premaxilla with six alveoli; quadrate sloped caudally; head of quadrate not coosified with paroccipital process (as in Shamosaurus); occipital condyle on long neck (as in nodosaurids), projecting horizontally (not obliquely downward as in all other known ankylosaurids and nodosaurids); pterygoids anterocaudally elongated and vaulted (as in nodosaurids); well-developed trochlear-like process along lateral edge of pterygoid; basitubera as very large, ventral-projecting wedge; large oval process for adductor tendon on medial side of coronoid process; ischium having large knob on medial side near pubic peduncle. (Carpenter, Kirkland, Burge and Bird, 2001)
Material of paratype specimen from the same quarry
CEUM 10405, disarticulated skull including left maxilla; CEUM 10410, fragment of left nasal; CEUM 10421, right prefrontal; CEUM 10560, right lacrimal; CEUM 10352, right postorbital; CEUM 10598, fragments of jugal; CEUM 10325, left frontal; CEUM 10332, parietal; CEUM 10345, right squamosal; CEUM 10417, left quadrate with attached quadratojugal; CEUM 10561. right quadratojugal; CEUM 10267, braincase; CEUM 10270, left surangular; CEUM 10529, left angular; CEUM 11288, centrum of cervical vertebrae; CEUM 10258, 10409, 10442 and 10360, dorsal centra; CEUM 12163, synsacrum of two dorsal, four sacral and one caudal vertebrae; CEUM 10258, ?first caudal vertebrae; CEUM 10258, 10387 and 10366, proximal caudal vertebrae; CEUM 10255, 10257, 10260, 10261, 10262, 10349, 10400 and 10412, midcaudal vertebrae; CEUM 10404 and 10407, distal caudals; CEUM 10258, partial right humerus; CEUM 10425, left ulna; CEUM 10266, left ischium; CEUM 10537, partial right ischium; CEUM 10375, fragment of right ilium; CEUM 10248 and 10445, cervical ribs; CEUM 10254, 10356, 10430, 10449 and 10984, metacarpals; CEUM 10247 and 9970, phalanges; CEUM 9922 and 10253, unguals; CEUM 10526, 10359, 10394, 10431, 10459, 10248, keeled armor plates; CEUM 10359, 9960, 9962, 10548, 10414 and 10441, compressed conial plates; and CEUM 10338, flat osteoderm.