''Fosterovenator'' (meaning "Foster's hunter") is a genus of

ceratosaur Ceratosaurs are members of the clade Ceratosauria, a group of dinosaurs defined as all theropods sharing a more recent common ancestor with ''Ceratosaurus'' than with birds. The oldest known ceratosaur, ''Saltriovenator'', dates to the earliest ...

dinosaur known from the

Late Jurassic The Late Jurassic is the third epoch of the Jurassic Period, and it spans the geologic time from 163.5 ± 1.0 to 145.0 ± 0.8 million years ago (Ma), which is preserved in Upper Jurassic strata.Owen 1987. In European lithostratigraphy, the name ...

Morrison Formation The Morrison Formation is a distinctive sequence of Late Jurassic, Upper Jurassic sedimentary rock found in the western United States which has been the most fertile source of dinosaur fossils in North America. It is composed of mudstone, sandsto ...

Wyoming Wyoming () is a U.S. state, state in the Mountain states, Mountain West subregion of the Western United States. It is bordered by Montana to the north and northwest, South Dakota and Nebraska to the east, Idaho to the west, Utah to the south ...

. The

holotype A holotype is a single physical example (or illustration) of an organism, known to have been used when the species (or lower-ranked taxon) was formally described. It is either the single such physical example (or illustration) or one of several ...

is YPM VP 058267A, B, and C, a

tibia The tibia (; ), also known as the shinbone or shankbone, is the larger, stronger, and anterior (frontal) of the two bones in the leg below the knee in vertebrates (the other being the fibula, behind and to the outside of the tibia); it connects ...

with an articulated

astragalus ''Astragalus'' is a large genus of over 3,000 species of herbs and small shrubs, belonging to the legume family Fabaceae and the subfamily Faboideae. It is the largest genus of plants in terms of described species. The genus is native to tempe ...

. An additional specimen is known, the

paratype In zoology and botany, a paratype is a specimen of an organism that helps define what the scientific name of a species and other taxon actually represents, but it is not the holotype (and in botany is also neither an isotype nor a syntype). Of ...

YPM VP 058267D, a

fibula The fibula or calf bone is a leg bone on the lateral side of the tibia, to which it is connected above and below. It is the smaller of the two bones and, in proportion to its length, the most slender of all the long bones. Its upper extremity is ...

of a larger individual. The

remains were in 1879 discovered by

Arthur Lakes Arthur Lakes (December 21, 1844—November 21, 1917) was an American geologist, artist, writer, teacher and Episcopalian minister. He captured much of his geological and palaeontological field work in sketches and watercolours. Lakes is credited ...

Como Bluff Como Bluff is a long ridge extending east–west, located between the towns of Rock River and Medicine Bow, Wyoming. The ridge is an anticline, formed as a result of compressional geological folding. Three geological formations, the Sundance, t ...

, Wyoming, and consist of a nearly-complete right

with a co-ossified

, probably of a juvenile. The

consists of a complete right

measuring in length and belonging to a much larger individual. The overall shape of the known material is similar to that of ''

Elaphrosaurus ''Elaphrosaurus'' ( ) is a genus of ceratosaurian theropod dinosaur that lived approximately 154 to 150 million years ago during the Late Jurassic Period in what is now Tanzania in Africa. ''Elaphrosaurus'' was a medium-sized but lightly built m ...

''. However, ceratosaurian affinities of ''Fosterovenator'' (at least of the paratype) have been questioned.

Etymology

The generic name ''Fosterovenator'' was in 2014 named by S. G. Dalman for John Russell Foster and the Latin word ''venator'' ("hunter"). The specific name ''churei'' is named for Daniel J. Chure.

References

Ceratosaurs Late Jurassic dinosaurs of North America Dinosaurs of the Morrison Formation Fossil taxa described in 2014 Paleontology in Wyoming {{Theropod-stub

Etymology

See also

References