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is characterized by strongly curved, depressed, breviconic shells. Curvature is exogastric, meaning the lower, or ventral, side is convex in longitudinal profile. The aperture is without a hyponomic sinus. The siphuncle is small and subventral.
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193:. Treatise on Invertebrate Paleontology. Lawrence, Kansas: Geological Society of America and University of Kansas Press. p. K190–K216.
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161:Other Devonian Acleistoceratidae are
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149:, that lived during the Middle
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350:Prehistoric nautiloid genera
303:. You can help Knowledge by
360:Prehistoric nautiloid stubs
376:
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36:Scientific classification
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189:R.C. Moore, ed. (1964).
145:belonging to the family
355:Middle Devonian animals
26:Temporal range: Middle
299:-related article is a
262:Paleobiology Database
191:Part K, Mollusca 3
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295:This prehistoric
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204:Taxon identifiers
147:Acleistoceratidae
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107:Acleistoceratidae
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212:Gonatocyrtoceras
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170:Paracleistoceras
155:Gonatocyrtoceras
135:Gonatocyrtoceras
120:Gonatocyrtoceras
22:Gonatocyrtoceras
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83:Nautiloidea
71:Cephalopoda
344:Categories
183:References
143:nautiloids
95:Oncocerida
78:Subclass:
297:nautiloid
140:oncocerid
42:Kingdom:
227:Q5581356
221:Wikidata
151:Devonian
102:Family:
59:Mollusca
54:Phylum:
47:Animalia
28:Devonian
254:1048792
241:4572491
114:Genus:
90:Order:
66:Class:
173:, and
267:13024
249:IRMNG
301:stub
236:GBIF
153:.
346::
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179:.
167:,
332:e
325:t
318:v
307:.
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