Meekoceras: Difference between revisions
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{{Italic title}} |
{{Italic title}} |
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{{Taxobox |
{{Taxobox |
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| fossil_range = |
| fossil_range = {{fossilrange|Olenekian}} |
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| image = Meekoceras.jpg |
| image = Meekoceras.jpg |
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| image_caption = ''Meekoceras'' at the [[New Mexico Museum of Natural History and Science]] |
| image_caption = ''Meekoceras'' at the [[New Mexico Museum of Natural History and Science]] |
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| superfamilia = †[[Noritoidea]] |
| superfamilia = †[[Noritoidea]] |
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| familia = †[[Meekoceratidae]] |
| familia = †[[Meekoceratidae]] |
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| subfamilia = |
| subfamilia = †[[Meekoceratinae]] |
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| genus = †'''''Meekoceras''''' |
| genus = †'''''Meekoceras''''' |
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| genus_authority = Hyatt, 1879 |
| genus_authority = [[Alpheus Hyatt|Hyatt]], 1879 |
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}} |
}} |
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'''''Meekoceras''''' is |
'''''Meekoceras''''' is an [[extinct]] [[genus]] of [[Ceratitida|ceratitid]] [[ammonite]]s with a discoidal shell that lived during the [[Early Triassic]] [[Epoch (geology)|Epoch]]. |
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==Description== |
==Description== |
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==Taxonomic position== |
==Taxonomic position== |
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Smith (1932) and Arkell et al. (1957) included ''Meekoceras'' in the Meekoceratidae, which was named to contain the genus. Different approaches were made regarding the next taxonomic level. Arkell, et al. (1957) includes Meekoceratidae in the Noritacdeae while Smith (1932) included them in the Prolecanitoidea. |
[[James Perrin Smith|Smith]] (1932)<ref>{{cite journal |last=Smith |first=James P. |year=1932 |title=Lower Triassic Ammonoids of North America |journal=US Geological Survey Professional Paper 167 |pages=1−199 |doi=10.3133/pp167}}</ref> and Arkell et al. (1957)<ref>{{cite book |last1=Arkell |first1=W.J. |last2=Furnish |first2=W. M. |last3=Kummel |first3=B. |last4=Miller |first4=A. K. |last5=Moore |first5=R. C.|last6=Schindewolf |first6=O. H. |last7=Sylvester-Bradley |first7=P. C. |last8=Wright |first8=C. W. |year=1957 |editor= R.C. Moore |chapter=Part L—Mollusca 4, Cephalopoda, Ammonoidea |title=[[Treatise on Invertebrate Paleontology]] |series=Geological Society and University of Kansas Press |isbn=0-8137-3012-0}}</ref> included ''Meekoceras'' in the [[Meekoceratidae]], which was named to contain the genus. Different approaches were made regarding the next taxonomic level. Arkell, et al. (1957) includes Meekoceratidae in the [[Noritacdeae]] while Smith (1932) included them in the [[Prolecanitoidea]]. |
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''[[Wyoningites]]'' and ''[[Svalbardiceras]]'' are related genera. |
''[[Wyoningites]]'' and ''[[Svalbardiceras]]'' are related genera. |
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== References == |
== References == |
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{{Reflist}} |
{{Reflist}} |
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* Arkell, W.J. et al., 1957. Mesozoic Ammonoidea. [[Treatise on Invertebrate Paleontology]] Part L. Geological Society and University of Kansas Press. |
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*Smith, J.P. 1932. Lower Triassic Ammonoids of North America. US Geological Survey Professional Paper 167. |
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{{Taxonbar|from=Q18358755}} |
{{Taxonbar|from=Q18358755}} |
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[[Category:Ceratitida genera]] |
[[Category:Ceratitida genera]] |
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[[Category:Triassic ammonites]] |
[[Category:Triassic ammonites]] |
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[[Category:Olenekian life]] |
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Revision as of 19:30, 5 December 2023
 | This article includes a list of references, related reading, or external links, but its sources remain unclear because it lacks inline citations. (May 2019) |
| Meekoceras Temporal range:
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| Meekoceras at the New Mexico Museum of Natural History and Science | |
| Scientific classification | |
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| Genus: | †Meekoceras Hyatt, 1879
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Meekoceras is an extinct genus of ceratitid ammonites with a discoidal shell that lived during the Early Triassic Epoch.
Description
Meekoceras is characterized by a compressed, discoidal, evolute or involute shell with flattened sides and narrow, flattened or rounded venter that is without keels or furrows. The surface is smooth or with lateral folds, but no tubercles, spines, or spiral ridges. Umbilicus variable, body chamber short. Sutures ceratitic with smooth rounded saddles and serrated lobes.
Taxonomic position
Smith (1932)[1] and Arkell et al. (1957)[2] included Meekoceras in the Meekoceratidae, which was named to contain the genus. Different approaches were made regarding the next taxonomic level. Arkell, et al. (1957) includes Meekoceratidae in the Noritacdeae while Smith (1932) included them in the Prolecanitoidea.
Wyoningites and Svalbardiceras are related genera.
References
- ^ Smith, James P. (1932). "Lower Triassic Ammonoids of North America". US Geological Survey Professional Paper 167: 1−199. doi:10.3133/pp167.
- ^ Arkell, W.J.; Furnish, W. M.; Kummel, B.; Miller, A. K.; Moore, R. C.; Schindewolf, O. H.; Sylvester-Bradley, P. C.; Wright, C. W. (1957). "Part L—Mollusca 4, Cephalopoda, Ammonoidea". In R.C. Moore (ed.). Treatise on Invertebrate Paleontology. Geological Society and University of Kansas Press. ISBN 0-8137-3012-0.
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