Coniophis

Coniophis is an extinct genus of snakes from the late Cretaceous period. The type species, "Coniophis precedes", was about 7 cm long and had snake-like teeth and body form, with a skull and a largely lizard-like bone structure. It probably ate small vertebrates. The fossil remains of "Coniophis" were first discovered at the end of the 19th century in the Lance Formation of the US state of Wyoming, and were described in 1892 by Othniel Charles Marsh. For the genus "Coniophis", a number of other species have been described. Their affiliation is, however, poorly secured, mostly based on vertebrae descriptions from only a few fossils.
Fossil distribution.
Fossils of "Coniophis" have been found in: