Published December 20, 2021
| Version v1
Taxonomic treatment
Open
Trocholitoceras Hyatt 1894
Creators
- 1. Finnish Museum of Natural History, University of Helsinki, PO Box 44, FI- 00014 Helsinki, Finland.
- 2. Paläontologisches Institut und Museum, University of Zurich, Zurich, Switzerland.
Description
Genus Trocholitoceras Hyatt, 1894 Type species
Trocholitoceras walcotti Hyatt, 1894, from the Fort Cassin Limestone (late Floian Stage), Fort Cassin, Addison County, Vermont, USA; by original designation.
DiagnosisModerately large, subdiscoidal, involute conchs with a ca 180° long body chamber; umbilical perforation very small; ornamented with prominent, partly fasciculate growth lines and low ribs which form a deep rounded ventral sinus; sutures directly transverse and nearly straight except on dorsal side where they form a shallow lobe; siphuncle small, subcentral during early adolescence, dorsal or nearly so at maturity (from Ulrich et al. 1942: 80).
Notes
Published as part of Kröger, Björn & Pohle, Alexander, 2021, Early-Middle Ordovician cephalopods from Ny Friesland, Spitsbergen - a pelagic fauna with Laurentian affinities, pp. 1-102 in European Journal of Taxonomy 783 (1) on page 69, DOI: 10.5852/ejt.2021.783.1601, http://zenodo.org/record/5793422
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Linked records
Additional details
Identifiers
Biodiversity
- Family
- Trocholitidae
- Genus
- Trocholitoceras
- Kingdom
- Animalia
- Order
- Tarphycerida
- Phylum
- Mollusca
- Scientific name authorship
- Hyatt
- Taxon rank
- genus
- Taxonomic concept label
- Trocholitoceras Hyatt, 1894 sec. Kröger & Pohle, 2021
References
- Hyatt A. 1894. Phylogeny of an acquired characteristic. Proceedings of the American Philosophical Society 32: 349 - 647. https: // doi. org / 10.5962 / bhl. title. 59826
- Ulrich E. O., Foerste A. F., Miller A. K. & Furnish W. M. 1942. Ozarkian and Canadian cephalopods: Part I: Nautilicones. Geological Society of America Special Papers 37: 1 - 157. https: // doi. org / 10.1130 / SPE 37 - p 1