Globimitoceras Korn 1993
Creators
- 1. Museum für Naturkunde, Leibniz-Institut für Evolutions- und Biodiversitätsforschung, Invalidenstrasse 43, 10115 Berlin, Germany.
Description
Genus Globimitoceras Korn, 1993 Type species
Globimitoceras globiforme Vöhringer, 1960; original designation.
DiagnosisGenus of the subfamily Prionoceratinae with globular conch in the juvenile and adult stage. Umbilicus almost closed throughout ontogeny. Growth lines fine and straight, without shell constrictions but with internal shell thickenings. Suture line with very narrow external and adventive lobes.
Genus compositionCentral Europe (Vöhringer 1960): Imitoceras globiforme Vöhringer, 1960.
South Europe (Korn & Feist 2007): Globimitoceras albaillei Korn & Feist, 2007.
North Africa (Ebbighausen & Bockwinkel 2007): Globimitoceras rharrhizense Ebbighausen & Bockwinkel, 2007.
South China (Sun & Shen 1965): Imitoceras sphericum Sun & Shen, 1965.
RemarksGlobimitoceras contains prionoceratid ammonoids that possess a spherical, subinvolute or involute conch throughout ontogeny but, unlike Mimimitoceras, do not possess shell constrictions. The aperture is very low at all stages; the whorl expansion rate rarely exceeds a value of 1.50.
Kullmann (2009) did not accept Globimitoceras as a valid genus and placed it in the synonymy of Paragattendorfia. He justified this by stating that Globimitoceras was introduced for species that only differ in the narrow umbilicus throughout almost the entire ontogeny. However, the genus is not only separated from Paragattendorfia by the width of the umbilicus alone but also by differences in the suture line. While Globimitoceras has very narrow external and adventive lobes, these are broader and V-shaped in Paragattendorfia; furthermore, the ventrolateral saddle is broadly rounded in Globimitoceras but narrow in Paragattendorfia.
Notes
Files
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Linked records
Additional details
Identifiers
Biodiversity
- Family
- Prionoceratidae
- Genus
- Globimitoceras
- Kingdom
- Animalia
- Order
- Goniatitina
- Phylum
- Mollusca
- Scientific name authorship
- Korn
- Taxon rank
- genus
- Taxonomic concept label
- Globimitoceras Korn, 1993 sec. Korn & Weyer, 2023
References
- Korn D. 1993. The ammonoid faunal change near the Devonian - Carboniferous boundary. Annales de la Societe geologique de Belgique 115: 581 - 593.
- Vohringer E. 1960. Die Goniatiten der unterkarbonischen Gattendorfia - Stufe im Honnetal (Sauerland). Fortschritte in der Geologie von Rheinland und Westfalen 3: 107 - 196.
- Korn D. & Feist R. 2007. Early Carboniferous ammonoid faunas and stratigraphy of the Montagne Noire (France). Fossil Record 10: 99 - 124. https: // doi. org / 10.5194 / fr- 10 - 99 - 2007
- Ebbighausen V. & Bockwinkel J. 2007. Tournaisian (Early Carboniferous / Mississippian) ammonoids from the Ma'der Basin (Anti-Atlas, Morocco). Fossil Record 10: 125 - 163. https: // doi. org / 10.1002 / mmng. 200700003
- Sun Y. & Shen Y. 1965. On the late Upper Devonian ammonite fauna of the Wocklumeria beds of south Kweichow and its stratigraphical significance. Professional Papers of the Academy of Geological Science, Ministry of Geology, section B 1: 33 - 100.
- Kullmann J. 2009. Prionoceratoidea, In: Seldon P. A. (Ed.), Treatise on Invertebrate Paleontology. Part L. Mollusca 4 Revised. Volume 2: Carboniferous and Permian Ammonoidea (Goniatitida and Prolecanitida): 2 - 10. The University of Kansas Paleontological Institute, Lawrence, Kansas.