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ammonites have a shell reaching a length of about 10 centimetres (3.9 in) and a width of about 7 centimetres (2.8 in). They are known as heteromorph shaped, with a partly uncoiled shell and the aperture directed toward the coiled part.
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Most ammonites are homomorph, as they maintain the same shape throughout the growth, while the ammonites in this genus have uncoiled shells (
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species are found in the
Cretaceous Barremian Stage (117-113 million year old) marine strata of Europe, Colombia and Morocco.
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or different-shaped ammonites), that would have precluded fast swimming.
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374:"Anisoceras and Ancyloceras from the Texas Cretaceous"
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227:epoch until the genus extinction during the Lower
346:Sepkoski's Online Genus Database – Cephalopoda
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219:found throughout the world during the Lower
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546:Early Cretaceous ammonites of Europe
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489:. You can help Knowledge (XXG) by
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372:Clark, David L. (November 1958).
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551:Cretaceous animals of Africa
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27:Genus of molluscs (fossil)
265:Ancyloceras matheronianum
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63:Scientific classification
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334:. Paleobiology Database.
273:Ancyloceras vandenheckii
18:Ancyloceras vandenheckii
378:Journal of Paleontology
485:-related article is a
40:Temporal range: Lower
448:Paleobiology Database
257:Ancyloceras mantelli
249:Ancyloceras fallauxi
241:Ancyloceras audouli
541:Ammonitida genera
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403:Taxon identifiers
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16:(Redirected from
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561:Ammonitida stubs
536:Ancyloceratoidea
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384:(6): 1076–1081.
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301:Distribution
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411:Ancyloceras
307:Ancyloceras
305:Fossils of
295:heteromorph
287:Ancyloceras
282:Description
260:Casey, 1960
252:Uhlig, 1883
214:heteromorph
205:Ancyloceras
176:Ancyloceras
110:Cephalopoda
36:Ancyloceras
530:Categories
483:Ammonitida
313:References
221:Cretaceous
142:Suborder:
136:Ammonitida
123:Ammonoidea
116:Subclass:
225:Barremian
217:ammonites
196:See text
182:d'Orbigny
86:Kingdom:
80:Eukaryota
44:to Lower
42:Barremian
426:Q1453659
420:Wikidata
190:Species
155:Family:
100:Mollusca
96:Phylum:
90:Animalia
76:Domain:
390:1300773
168:Genus:
129:Order:
106:Class:
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229:Aptian
184:, 1842
46:Aptian
481:This
453:84902
386:JSTOR
210:genus
487:stub
440:VLV
435:CoL
212:of
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321:^
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518:e
511:t
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172:†
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
