Gonionautilidae is a family in the
nautilid superfamily Clydonautiliaceae that contains only the genus ''Gonionautilus'', known from the Upper Triassic (Norian) of Europe and North America. (Alps, state of Nevada)
''Gonionautilus'' has a smooth, compressed involute shell with a narrow flattened venter and angular ventral shoulders. The suture resembles that of ''
Clydonautilus
''Clydonautilus'' is a genus of nautiloids and type for the Clydonautilidae that has been found in the Upper Triassic of Europe, India, and Timor. Its type is ''C. noricus''.
''Clydonautilus'' is the most derived of the Clydonautilitidae, evide ...
'', from which it must have been derived, except for the more highly developed median saddle and bifurcated dorsal lobe.
''Gonionautilus'' (Gonionautilidae) is one of a number of advanced
nautiloid cephalopods that developed sutures resembling those of some
goniatites
''Goniatites'' is a genus of extinct cephalopods belonging to the family Goniatitidae, included in the superfamily Goniatitaceae. '' Hibernicoceras'' and '' Hypergoniatites'' are among related genera.
Species
Description
The shell is genera ...
in the
Ammonoidea
Ammonoids are a group of extinct marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs, commonly referred to as ammonites, are more closely related to living coleoids (i.e., octopuses, squid and cuttle ...
.
References
* Bernhard Kummel, 1964. Nautiloidea -Nautilida; Treatise on Invertebrate Paleontology, Part K. Geol Soc of America and Univ of Kansas press, R.C. Moore (ed)
{{Taxonbar, from=Q5581948
Prehistoric nautiloid families
Norian first appearances
Norian extinctions