The shell of Flemingites is evolute so that all whorls show externally. Whorls are robust, slightly embracing, usually a little higher than wide and increasing very slowly. The venter (outside rim) is somewhat flattened and usually much narrower that the widest part of the whorl. Strong, always single, lateral ribs are confined to the sides. Fine spiral ridges typically cover the shell, found even in casts. The suture is distinctly ceratitic with rounded entire saddles and deep serrated lobes.[1]
Taxonomic positionedit
Smith, J. P. (1932) included Flemingites in the Xenodiscidae,[1] which was included in the superfamily Prolecanitoidea (note spelling as of date given). Later it was reassigned to the Flemingitidae and Noritaceae as shown in part L of the American Treatise[2]
Other classifications put Flemingites in the Meekocerataceae,[3] or as recently renamed, Meekoceratoidea.
Distributionedit
Flemingites is found widespread throughout the northern hemisphere[3] and is thought to have been derived from Ophiceras.[2]
Referencesedit
^ abJames Perrin Smith, 1932. Lower Triassic Ammonoids of North America. USGS PP 167.
^ abTreatise on Invertebrate Paleontology Part L,1957, (p 135, fig 168.4,
flemingites, extinct, genus, evolute, ammonoid, from, smithian, lower, triassic, with, spiral, ridges, shell, temporal, range, olenekian, preꞒ, scientific, classification, kingdom, animalia, phylum, mollusca, class, cephalopoda, subclass, ammonoidea, order, ce. Flemingites is an extinct genus of evolute ammonoid from the Smithian Lower Triassic with spiral ridges on the shell FlemingitesTemporal range Olenekian PreꞒ Ꞓ O S D C P T J K Pg N Scientific classification Kingdom Animalia Phylum Mollusca Class Cephalopoda Subclass Ammonoidea Order Ceratitida Genus FlemingitesWaagen 1892 Contents 1 Diagnosis 2 Taxonomic position 3 Distribution 4 ReferencesDiagnosis editThe shell of Flemingites is evolute so that all whorls show externally Whorls are robust slightly embracing usually a little higher than wide and increasing very slowly The venter outside rim is somewhat flattened and usually much narrower that the widest part of the whorl Strong always single lateral ribs are confined to the sides Fine spiral ridges typically cover the shell found even in casts The suture is distinctly ceratitic with rounded entire saddles and deep serrated lobes 1 Taxonomic position editSmith J P 1932 included Flemingites in the Xenodiscidae 1 which was included in the superfamily Prolecanitoidea note spelling as of date given Later it was reassigned to the Flemingitidae and Noritaceae as shown in part L of the American Treatise 2 Other classifications put Flemingites in the Meekocerataceae 3 or as recently renamed Meekoceratoidea Distribution editFlemingites is found widespread throughout the northern hemisphere 3 and is thought to have been derived from Ophiceras 2 References edit a b James Perrin Smith 1932 Lower Triassic Ammonoids of North America USGS PP 167 a b Treatise on Invertebrate Paleontology Part L 1957 p 135 fig 168 4 a b Flemingites in Fossilworks 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 Flemingites amp oldid 1188342015, wikipedia, wiki, book, books, library,
