Pronunciation: seel-YOOR-us Meaning: Hollow tail Author/s: Marsh (1879) Synonyms: See below First Discovery: Wyoming, USA Chart Position: 39
Coelurus fragilis is known from a partial skeleton found strewn around Quarry 13 of Wyoming's Morrison Formation that O.C. Marsh described in 1879 as belonging to an "animal about as large as a wolf and probably carnivorous".
(Fragile hollow tail) EtymologyCoelurus is derived from the Greek "koilos" (hollow) and "oura" (tail) because of the hollow interiors of its thin-walled vertebrae. The species epithet, fragilis, means "fragile" in Latn, again referring to its vertebrae.
DiscoveryThe first fossils of Coelurus were found in Reed's Quarry 13 at Como Bluff in Wyoming's Morrison Formation, between September 1879 and September 1880.
The holotype (YPM 1993) is a partial skeleton, including numerous vertebrae, partial pelvic and shoulder girdles, and much of the arms and legs.