Nostoceratidae: Difference between revisions
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{{Short description|Extinct family of ammonites}} |
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{{Taxobox |
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{{Automatic taxobox |
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| fossil_range = Late |
| fossil_range = {{Fossil range|Late Cretaceous}} |
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| image = Nostoceras_species.JPG |
| image = Nostoceras_species.JPG |
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| image_caption = ''[[Nostoceras]] sp'' |
| image_caption = ''[[Nostoceras]] sp.'' |
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| regnum = [[Animal]]ia |
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| authority = Hyatt, 1894 |
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| phylum = [[Mollusca]] |
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| type_genus = ''[[Nostoceras]]'' |
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| type_genus_authority = Hyatt, 1894 |
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| subclassis = [[Ammonite|Ammonoidea]] |
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| ordo = [[Ammonitida]] |
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| subdivision_ref = <ref name="fossilworks">{{cite web |title=Paleobiology Database – Nostoceratidae |url=https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=95937 |access-date=2014-05-28 }}</ref> |
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| subordo = [[Ancyloceratina]] |
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| superfamilia = [[Turrilitaceae]] |
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| familia = '''Nostoceratidae''' |
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* ''[[ |
* ''[[Axonoceras]]'' |
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* ''[[Bostrychoceras]]'' |
* ''[[Bostrychoceras]]'' |
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* ''[[Eubostrychoceras]]'' |
* ''[[Eubostrychoceras]]'' |
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* ''[[ |
* ''[[Exiteloceras]]'' |
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* ''[[Ainoceras]]'' (''Jouainoceras'') |
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* ''[[Hyphantoceras]]'' |
* ''[[Hyphantoceras]]'' |
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* ''[[ |
* ''[[Jouaniceras]]'' |
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* ''[[Muramotoceras]]'' |
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* ''[[Nipponites]]'' |
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* ''[[Nostoceras]]'' |
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* ''[[Pravitoceras]]'' |
* ''[[Pravitoceras]]'' |
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* |
* ''[[Tridenticeras]]'' |
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* ''{{ill|Yezoceras|ja|エゾセラス}}''<ref>{{Cite journal|title=A New Species of ''Yezoceras'' (Ammonoidea, Nostoceratidae) from the Coniacian in the Northwestern Pacific Realm |author1=Daisuke Aiba |author2=Tomoki Karasawa |author3=Tetsuro Iwasaki |date=2020-12-30 |journal=Paleontological Research |volume=25 |issue=1 |pages=1–10 |url=https://doi.org/10.2517/2020PR008 |doi=10.2517/2020PR008|s2cid=229723571 }}</ref> |
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}} |
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'''Nostoceratidae''' is a diverse [[Family (biology)|family]] of [[heteromorph]] [[ammonite]]s found throughout the oceans of the world during the Late [[Cretaceous]]. The nostoceratids are famous for the bizarre coiling of their shells. Many genera, such as ''[[Yezoceras]]'', ''[[Ainoceras]]'', ''[[Anaklinoceras]]'', and some species of ''[[Bostrychoceras]]'' and ''[[Eubostrychoceras]]'', display, as young shells at least, a helical coiling very similar to the shells of the related family, [[Turrilitidae]]. As adults, though, the coils then curve away from the axis of coiling, either as an [[oxbow]]-like curve around the juvenile coils as in ''Ainoceras'' and ''Anaklinoceras'', or in a simple curved loop beneath the juvenile coils, as in ''Yezoceras''. Other genera form loose coils, sometimes in a spiral, such as those of ''[[Madagascarites]]'', ''[[Muramotoceras]]'', ''[[Hyphantoceras]]'', and the infamously convolute ''[[Nipponites]]''. |
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The ecology of nostoceratids is the subject of continued speculation, as the bizarrely coiled shells have no streamlining, strongly suggesting that the living animals had extraordinarily poor swimming ability, if any ability at all. As such, experts and ammonite enthusiasts presume that the nostoceratids either floated passively in the water column, or were bottom-dwellers that may or may not have crawled on the seafloor. |
The ecology of nostoceratids is the subject of continued speculation, as the bizarrely coiled shells have no streamlining, strongly suggesting that the living animals had extraordinarily poor swimming ability, if any ability at all. As such, experts and ammonite enthusiasts presume that the nostoceratids either floated passively in the water column, or were bottom-dwellers that may or may not have crawled on the seafloor. |
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The nostoceratids, as with |
The nostoceratids, as with most other Cretaceous ammonites, perished during the [[Cretaceous–Paleogene extinction event]]. |
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== |
==References== |
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{{Reflist}} |
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* [[Nautiloid]] |
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* [[Lituites]] |
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* [[Orthoceras]] |
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==External links== |
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*[http://palaeo-electronica.org/1998_1/monks/issue1.htm Scientific report on the functional morphology of Cretaceous heteromorph ammonites] |
*[http://palaeo-electronica.org/1998_1/monks/issue1.htm Scientific report on the functional morphology of Cretaceous heteromorph ammonites] |
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{{Taxonbar|from=Q16747533}} |
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[[Category:Nostoceratidae| ]] |
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[[Category:Ammonitida families]] |
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[[Category:Late Cretaceous first appearances]] |
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[[Category:Maastrichtian extinctions]] |
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{{ |
{{Ammonitida-stub}} |
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Latest revision as of 08:17, 18 November 2024
| Nostoceratidae Temporal range:
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| Nostoceras sp. | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | †Ammonoidea |
| Order: | †Ammonitida |
| Suborder: | †Ancyloceratina |
| Superfamily: | †Turrilitoidea |
| Family: | †Nostoceratidae Hyatt, 1894 |
| Type genus | |
| Nostoceras Hyatt, 1894
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| Genera[2] | |
Nostoceratidae is a diverse family of heteromorph ammonites found throughout the oceans of the world during the Late Cretaceous. The nostoceratids are famous for the bizarre coiling of their shells. Many genera, such as Yezoceras, Ainoceras, Anaklinoceras, and some species of Bostrychoceras and Eubostrychoceras, display, as young shells at least, a helical coiling very similar to the shells of the related family, Turrilitidae. As adults, though, the coils then curve away from the axis of coiling, either as an oxbow-like curve around the juvenile coils as in Ainoceras and Anaklinoceras, or in a simple curved loop beneath the juvenile coils, as in Yezoceras. Other genera form loose coils, sometimes in a spiral, such as those of Madagascarites, Muramotoceras, Hyphantoceras, and the infamously convolute Nipponites.
The ecology of nostoceratids is the subject of continued speculation, as the bizarrely coiled shells have no streamlining, strongly suggesting that the living animals had extraordinarily poor swimming ability, if any ability at all. As such, experts and ammonite enthusiasts presume that the nostoceratids either floated passively in the water column, or were bottom-dwellers that may or may not have crawled on the seafloor.
The nostoceratids, as with most other Cretaceous ammonites, perished during the Cretaceous–Paleogene extinction event.
References
[edit]- ^ Daisuke Aiba; Tomoki Karasawa; Tetsuro Iwasaki (2020-12-30). "A New Species of Yezoceras (Ammonoidea, Nostoceratidae) from the Coniacian in the Northwestern Pacific Realm". Paleontological Research. 25 (1): 1–10. doi:10.2517/2020PR008. S2CID 229723571.
- ^ "Paleobiology Database – Nostoceratidae". Retrieved 2014-05-28.
External links
[edit]
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