583:
128:
115:
360:
have been found in
Antarctica, Australia, Austria, Belgium, Brazil, Canada (British Columbia), Chile, Denmark, France, Germany, Haiti, India, Iran, Japan, Mexico, the Netherlands, New Zealand, Nigeria, Oman, Romania, the Russian Federation, Poland, Saudi Arabia, South Africa, Spain, Turkey, Ukraine,
290:
is compressed and high-whorled, with an oval or flat sided section. Ribs tend to be differentiated into short umbilical and separate ventro-lateral sets, with a smooth area between. Some
337:
723:
532:
713:
663:
624:
708:
668:
519:
325:
361:
the United Arab
Emirates, and the United States (Alaska, Arkansas, California, Delaware, Mississippi, New Jersey, Oregon, Texas, Washington).
432:
389:
450:
Kennedy, W. J. (1986). Campanian and
Maastrichtian Ammonites from Northern Aquitaine, France (No. 36). Palaeontological association. page 30
743:
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703:
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410:
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643:
610:
653:
678:
459:
329:
228:
558:
379:
435:, Part L, Ammonoidea. R.C. Moore, ed. Geological Soc. of America and Univ. Kansas press. p L377-L380.
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122:
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30:
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37:
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67:
62:
52:
524:
291:
102:
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specimens of this genus reached 40 cm (16 in) in diameter.
149:
34:
453:
445:
Cephalopods
Present and Past: New Insights and Fresh Perspectives
457:
316:
in which ribs disappear early, leaving an almost smooth shell.
447:
by Neil H. Landman, Richard Arnold Davis, and Royal H. Mapes
598:
466:
283:. Altogether some 28 species have been described.
378:Charles A. Repenning, Richard H. Tedford (2013).
618:
8:
724:Late Cretaceous ammonites of North America
625:
611:
454:
113:
20:
384:. Indiana University Press. p. 183.
326:International Commission on Stratigraphy
370:
433:Treatise on Invertebrate Paleontology
348:, 72.1 ± 0.2 million years ago.
7:
579:
577:
714:Late Cretaceous ammonites of Europe
271:with a worldwide distribution, and
597:. You can help Knowledge (XXG) by
14:
664:Campanian genus first appearances
581:
381:Fossils of the Carpathian Region
126:
709:Cretaceous animals of Australia
669:Maastrichtian genus extinctions
308:in which the ribs persist, and
275:for the desmoceratacean family
1:
320:Biostratigraphic significance
279:. The genus' type species is
439:A Pictorial Guide to Fossils
498:Pachydiscus (Pachydiscidae)
785:
744:Ammonites of South America
576:
338:defining biological marker
16:Genus of molluscs (fossil)
243:
236:
123:Scientific classification
121:
112:
23:
739:Cretaceous United States
300:includes two subgenera,
764:Ammonites of Antarctica
334:Pachydiscus neubergicus
328:(ICS) has assigned the
259:is an extinct genus of
43:Upper Cretaceous–Danian
704:Ammonites of Australia
593:-related article is a
330:First Appearance Datum
559:Paleobiology Database
340:for the start of the
759:Cretaceous Caribbean
674:Cretaceous ammonites
441:by Gerard Ramon Case
684:Ammonites of Africa
342:Maastrichtian Stage
659:Maastrichtian life
310:P. (Neodesmoceras)
749:Cretaceous Brazil
734:Cretaceous Mexico
729:Cretaceous Canada
719:Cretaceous Europe
694:Ammonites of Asia
689:Cretaceous Africa
649:Ammonitida genera
606:
605:
574:
573:
546:Open Tree of Life
460:Taxon identifiers
391:978-0-253-00987-6
252:
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232:
776:
769:Ammonitina stubs
754:Cretaceous Chile
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302:P. (Pachysiscus)
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29:Temporal range:
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699:Cretaceous Asia
644:Desmoceratoidea
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427:Further reading
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269:Early Paleocene
265:Late Cretaceous
246:Parapachydiscus
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55:
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31:Late Cretaceous
27:
17:
12:
11:
5:
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654:Campanian life
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281:P. neubergicus
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679:Index fossils
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319:
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314:Maastrichtian
311:
307:
303:
299:
295:
293:
289:
286:The shell of
284:
282:
278:
277:Pachydiscidae
274:
270:
266:
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258:
257:
248:
247:
242:
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217:
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209:Pachydiscidae
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22:
19:
599:expanding it
588:
467:
444:
438:
411:
406:
395:. Retrieved
380:
373:
357:
355:
352:Distribution
333:
323:
309:
301:
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287:
285:
280:
255:
254:
253:
245:
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222:
221:
24:
18:
492:Wikispecies
468:Pachydiscus
417:Fossilworks
412:Pachydiscus
358:Pachydiscus
356:Fossils of
298:Pachydiscus
288:Pachydiscus
256:Pachydiscus
223:Pachydiscus
170:Cephalopoda
25:Pachydiscus
638:Categories
591:Ammonitina
397:2022-08-23
365:References
346:Cretaceous
196:Ammonitida
183:Ammonoidea
176:Subclass:
312:from the
306:Campanian
304:from the
292:Hungarian
263:from the
146:Kingdom:
140:Eukaryota
38:Paleocene
483:Q1638263
477:Wikidata
261:ammonite
238:Synonyms
202:Family:
160:Mollusca
156:Phylum:
150:Animalia
136:Domain:
551:4955974
538:1262075
525:3245931
344:of the
336:as the
215:Genus:
189:Order:
166:Class:
388:
231:, 1884
229:Zittel
589:This
564:15309
533:IRMNG
35:Early
595:stub
520:GBIF
512:6BSP
419:.org
386:ISBN
324:The
273:type
267:and
48:PreꞒ
507:CoL
415:at
332:of
640::
561::
548::
535::
522::
509::
494::
479::
98:Pg
40:,
626:e
619:t
612:v
601:.
400:.
219:†
206:†
193:†
180:†
103:N
93:K
88:J
83:T
78:P
73:C
68:D
63:S
58:O
53:Ꞓ
33:-
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
