Gonionautilidae
Encyclopedia
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, 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 in the Ammonoidea.
Nautilida
The Nautilida constitute a large and diverse order of generally coiled nautiloid cephalopods that began in the mid Paleozoic and continues to the present with a single family, the Nautilidae which includes two genera, Nautilus and Allonautilus, with six species...
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, 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 in the Ammonoidea.
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)