Aulacosphinctoides is an extinct ammonoid cephalopod that lived during the Late Jurassic (Late Kimmeridgian to early Tithonian), included in the ammonitid family Perisphinctidae.
The shell of Aulacosphinctoides is evolute, whorls broadly rounded, ribs sigmoid that mostly bifurcate, but often trifurcate, Lappets present. Closely resembles Torquantisphinctes, differing in having more rounded or depressed whorls and more sigmoid and frequently triplicate ribbing.
^Sepkoski, Jack (2002). "Sepkoski's Online Genus Database". Retrieved 2014-05-28.
Further readingedit
Arkell, W.J.; Kummel, B.; Wright, C.W. (1957). Mesozoic Ammonoidea. Treatise on Invertebrate Paleontology, Part L, Mollusca 4. Lawrence, Kansas: Geological Society of America and University of Kansas Press.
This Ammonitina-related article is a stub. You can help Wikipedia by expanding it.
aulacosphinctoides, extinct, ammonoid, cephalopod, that, lived, during, late, jurassic, late, kimmeridgian, early, tithonian, included, ammonitid, family, perisphinctidae, temporal, range, kimmeridgian, tithonian, preꞒ, nscientific, classificationdomain, eukar. Aulacosphinctoides is an extinct ammonoid cephalopod that lived during the Late Jurassic Late Kimmeridgian to early Tithonian included in the ammonitid family Perisphinctidae AulacosphinctoidesTemporal range Kimmeridgian Tithonian 1 PreꞒ Ꞓ O S D C P T J K Pg NScientific classificationDomain EukaryotaKingdom AnimaliaPhylum MolluscaClass CephalopodaSubclass AmmonoideaOrder AmmonitidaFamily PerisphinctidaeGenus AulacosphinctoidesSpath 1923SpeciesSee textThe shell of Aulacosphinctoides is evolute whorls broadly rounded ribs sigmoid that mostly bifurcate but often trifurcate Lappets present Closely resembles Torquantisphinctes differing in having more rounded or depressed whorls and more sigmoid and frequently triplicate ribbing The genus Aulacosphinctoides has been found in Somalia northern India Japan Argentina Mexico New Zealand and Madagascar References edit Sepkoski Jack 2002 Sepkoski s Online Genus Database Retrieved 2014 05 28 Further reading editArkell W J Kummel B Wright C W 1957 Mesozoic Ammonoidea Treatise on Invertebrate Paleontology Part L Mollusca 4 Lawrence Kansas Geological Society of America and University of Kansas Press nbsp This Ammonitina related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Aulacosphinctoides amp oldid 1194769908, wikipedia, wiki, book, books, library,
