Published December 20, 2021
| Version v1
Taxonomic treatment
Open
Lawrenceoceras Ulrich, Foerste, Miller & Unklesbay 1944
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 Lawrenceoceras Ulrich, Foerste, Miller & Unklesbay, 1944 Type species
Lawrenceoceras collinsi Ulrich, Foerste, Miller & Unklesbay, 1944 from boulders at Point Levis, Levis County, Quebec, Canada (presumably late Floian); by original designation.
DiagnosisSmooth, slender, cyrtocones with elliptically depressed cross section. Sutures directly transverse, with very shallow, broad dorsal and ventral lobes. Siphuncle small, about 0.1 of conch diameter, on convex side of conch, almost marginal in position. Siphuncular segments cylindrical or nearly so (compiled from Ulrich et al. 1944).
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 10, DOI: 10.5852/ejt.2021.783.1601, http://zenodo.org/record/5793422
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Linked records
Additional details
Identifiers
Biodiversity
- Family
- Bassleroceratidae
- Genus
- Lawrenceoceras
- Kingdom
- Animalia
- Order
- Ellesmerocerida
- Phylum
- Mollusca
- Scientific name authorship
- Ulrich, Foerste, Miller & Unklesbay
- Taxon rank
- genus
- Taxonomic concept label
- Lawrenceoceras Ulrich, 1944 sec. Kröger & Pohle, 2021
References
- Ulrich E. O., Foerste A. F., Miller A. K. & Unklesbay A. G. 1944. Ozarkian and Canadian cephalopods. Part III: Longicones and summary. Geological Society of America Special Papers 58: 1 - 226. https: // doi. org / 10.1130 / SPE 58