''Parahildaites'' is genus of
ammonites that lived during the lower
Toarcian stage of
early Jurassic, during Bifrons zone. It differs from ''
Hildaites
Hildoceratinae is an extinct subfamily of cephalopods belonging to the family Hildoceratidae. Ammonites of this subfamily had shells with elliptical or quadrate whorl section with keel or tricarinate, bisulcate venter. Ribs were variable, from fa ...
'' and ''
Hildoceras
''Hildoceras'' is a genus of ammonite from the Jurassic period in the family Hildoceratidae. The shells are characterized by a narrow discoidal evolute shape, keeled venter, concave ribs along the outer flanks, and a shallow spiral groove r ...
'' by having smooth shell after reaching 4 cm in diameter. There is no spiral groove and on early whorls, there can be sigmoidal ribs or striae. Strong keel is bordered by flat areas or slight sulci. Its fossils were found in Saudi Arabia and Madagascar.
[M. K. Howarth 2013. Treatise on Invertebrate Paleontology, Part L, Revised, Volume 3B, Chapter 4: Psiloceratoidea, Eoderoceratoidea, Hildoceratoidea.]
References
Ammonitida genera
Hildoceratidae
Toarcian life
Ammonites of Africa
Ammonites of Asia
Ammonite genera
{{Ammonitina-stub