''Aethoceras'' is a genus of
Tarphycerida nautiloids included in the family
Estonioceratidae
The Estonioceratidae are a family of loosely coiled tarphycerids in which the inner side of the whorls, which forms the dorsum, is rounded or flat with no impression, and in which the siphuncle, composed of thick tubular segments, is located ve ...
for which the shell is a loosely coiled, gradually expanding dextral torticone with a slightly depressed whorl section. Siphuncle small, ventral, submarginal. Whorl section somewhat resembles early stages of ''
Estonioceras
''Estonioceras'' is an extinct genus of tarphyceridan nautiloids from the Ordovician of Europe.
Sources
* ''Dinosaur Encyclopedia'' by Jayne Parsons
* ''Fossils'' (Smithsonian Handbooks) by David Ward
External links''Estonioceras''in the Pa ...
'' in being laterally fanged. Trochoidal coiling brings to mind the later
Trocholitidae
The Trocholitidae are Tarphycerida with whorls in close contact as with the Tarphyceratidae, but in which the siphuncle, similar in structure, becomes dorsal. The Trocholitidae are derived from the Tarphyceratidae, perhaps from different tarphyc ...
. ''Aethoceras'' was originally found in the lower Ordovician of Western Australia.
References
* Furnish & Glennster, 1964, Nautiloidea - Tarphycerida. Treatise on Invertetrate Paleontology, Part C. University of Kansas Press, Lawrence, Ka.
''Aethoceras''in Fossilworks. 1/5/15
Prehistoric nautiloid genera
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