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itself has a strongly ribbed, involute, subglobose to discoidal shell with a somewhat small open umbilicus, compressed whorl section, higher than wide, and rounded venter. Early whorls are more strongly ribbed than later, which become smoother, ending with a smooth body chamber. Primary ribs, which
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emanate radially from the umbilicus, bifurcate and sometimes trifurcate mid flank and cross the venter uninterrupted. Shells grew to be large, even gigantic. Distribution is widespread.
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also has a broad shell with depressed whorl section and sharp ribbing that continues to the end. Primary ribs on the inner part of the whorls slope dorso-ventrally to the rear.
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427:
Arkell et al. 1957. Mesozoic
Ammonoidea. Treatise on Invertebrate Paleontology, Part L. Geological Society of America and Univ of Kansas Press, R.C. Moore (ed)
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proper, with a depressed whorl section, wider than high, broadly arched venter, coarse plicate ribbing and wider umbilicus.
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is broad and coarsely ribbed in early growth stages but becomes smoother and more compressed in the adult.
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but has fine ribbing that continues to the end and is never large.
401:"A compendium of fossil marine animal genera (Cephalopoda entry)"
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8:
350:Macrocephalites (Dolikephalites) perseverans
439:aff. cossmani Petitclerc 1915, illustrated.
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20:
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271:tentatively included as the fourth.
574:. You can help Knowledge (XXG) by
437:Macrocephalites (Kamptokephalites)
405:Bulletins of American Paleontology
14:
558:
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300:is similar in general form to
263:are recognized in addition to
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433:Buckman 1922, illustrated.
379:Macrocephalites diadematus
112:Scientific classification
110:
101:
23:
399:Sepkoski, Jack (2002).
570:-related article is a
533:Paleobiology Database
431:Macrocephalites verus
312:is more globose than
251:. Three subgenera,
247:stage of the Middle
243:, diagnostic of the
626:Ammonites of Europe
32:Bathonian–Callovian
631:Stephanoceratoidea
621:Jurassic ammonites
232:is a genus of the
636:Ammonitida genera
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520:Open Tree of Life
449:Taxon identifiers
241:Macrocephalitidae
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198:Macrocephalitidae
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641:Ammonitina stubs
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365:Kamptokephalites
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321:Pleurocephalites
314:Macrocephalites'
309:Kamptokephalites
261:Pleurocephalites
257:Kamptokephalites
234:stephanoceratoid
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29:Temporal range:
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16:Genus of mollusc
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457:Macrocephalites
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229:Macrocephalites
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25:Macrocephalites
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329:Indocephalites
297:Dolikephalites
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269:Indocephalites
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576:expanding it
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413:. Retrieved
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159:Cephalopoda
615:Categories
568:Ammonitina
415:2017-10-18
386:References
275:Diagnosis
185:Ammonitida
172:Ammonoidea
165:Subclass:
363:Subgenus
291:Subgenera
245:Callovian
135:Kingdom:
129:Eukaryota
472:Q6725185
466:Wikidata
249:Jurassic
237:ammonite
191:Family:
149:Mollusca
145:Phylum:
139:Animalia
125:Domain:
525:2869098
512:1006636
499:4626398
411:: 1–560
336:Gallery
239:family
204:Genus:
178:Order:
155:Class:
259:, and
220:, 1884
218:Zittel
566:This
538:15148
507:IRMNG
572:stub
494:GBIF
486:5J9M
279:s.s.
37:PreꞒ
481:CoL
409:363
255:,
617::
535::
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509::
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483::
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407:.
403:.
87:Pg
603:e
596:t
589:v
578:.
418:.
208:†
195:†
182:†
169:†
92:N
82:K
77:J
72:T
67:P
62:C
57:D
52:S
47:O
42:Ꞓ
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