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 positionedit
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.
Referencesedit
^Smith, James P. (1932). "Lower Triassic Ammonoids of North America" (PDF). 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. ISBN0-8137-3012-0.
This Ceratitida-related article is a stub. You can help Wikipedia by expanding it.
meekoceras, this, article, includes, list, references, related, reading, external, links, sources, remain, unclear, because, lacks, inline, citations, please, help, improve, this, article, introducing, more, precise, citations, 2019, learn, when, remove, this,. This article includes a list of references related reading or external links but its sources remain unclear because it lacks inline citations Please help improve this article by introducing more precise citations May 2019 Learn how and when to remove this message Meekoceras is an extinct genus of ceratitid ammonites with a discoidal shell that lived during the Early Triassic Epoch MeekocerasTemporal range Olenekian PreꞒ Ꞓ O S D C P T J K Pg N Meekoceras at the New Mexico Museum of Natural History and Science Scientific classification Kingdom Animalia Phylum Mollusca Class Cephalopoda Subclass Ammonoidea Order Ceratitida Superfamily Noritoidea Family Meekoceratidae Subfamily Meekoceratinae Genus MeekocerasHyatt 1879Description editMeekoceras 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 editSmith 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 edit Smith James P 1932 Lower Triassic Ammonoids of North America PDF 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 nbsp This Ceratitida related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Meekoceras amp oldid 1189729803, wikipedia, wiki, book, books, library,
