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262:, where the young ammonite's shell coiled helically, and upon reaching adulthood, the youngest coil arched over the older coils.
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period. Their shells were very similar to the related ammonites of the genus
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that lived in marine environments in what is now
Western
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462:Late Cretaceous ammonites of North America
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415:. You can help Knowledge (XXG) by
281:"Sepkoski's Online Genus Database"
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16:Genus of molluscs (fossil)
103:Scientific classification
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279:Sepkoski, Jack (2002).
237:of extinct heteromorph
411:-related article is a
374:Paleobiology Database
472:Ammonitida genera
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303:Taxon identifiers
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252:division of the
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29:Temporal range:
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477:Nostoceratidae
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202:Nostoceratidae
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417:expanding it
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284:. Retrieved
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24:
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248:during the
150:Cephalopoda
456:Categories
409:Ammonitida
286:2014-05-28
266:References
254:Cretaceous
242:cephalopod
182:Suborder:
176:Ammonitida
163:Ammonoidea
156:Subclass:
259:Ainoceras
250:Campanian
126:Kingdom:
120:Eukaryota
32:Campanian
326:Q4750987
320:Wikidata
239:ammonite
195:Family:
140:Mollusca
136:Phylum:
130:Animalia
116:Domain:
366:1266688
353:4627326
208:Genus:
169:Order:
146:Class:
407:This
379:14551
361:IRMNG
340:62BP8
235:genus
233:is a
413:stub
348:GBIF
37:Preκ
335:CoL
458::
376::
363::
350::
337::
322::
87:Pg
444:e
437:t
430:v
419:.
289:.
212:β
199:β
186:β
173:β
160:β
92:N
82:K
77:J
72:T
67:P
62:C
57:D
52:S
47:O
42:κ
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