Biology:Cyrtocerinidae
From HandWiki
| Cyrtocerinidae Temporal range: Ordovician
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | Nautiloidea |
| Order: | †Cyrtocerinida |
| Family: | †Cyrtocerinidae Flower, 1946 |
| Genera | |
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Cyrtocerinidae is a family of nautiloid cephalopods in the Order Cyrtocerinida,[1] previously considered ellesmerocerids.[2] Members of the family have slightly endogastric (inwardly curved) breviconic shells with ventral siphuncles that have connecting rings thickened as lobes that project straight into the interior.[2]
Cyrtocerinidae was established by Flower 1964[2] for the genus Cyrtocerina Billings 1865, found at various locations across North America. The shells are generally small, laterally compressed, and dorsum more narrowly rounded than the venter.[2]
References
- ↑ Mutvei, Harry (2015-07-03). "Characterization of two new superorders Nautilosiphonata and Calciosiphonata and a new order Cyrtocerinida of the subclass Nautiloidea; siphuncular structure in the Ordovician nautiloid Bathmoceras (Cephalopoda)" (in en). GFF 137 (3): 164–174. doi:10.1080/11035897.2015.1061592. ISSN 1103-5897. http://www.tandfonline.com/doi/full/10.1080/11035897.2015.1061592.
- ↑ 2.0 2.1 2.2 2.3 Flower, Rousseau H. (1964). "The nautiloid order Ellesmeroceratida (Cephalopoda)". New Mexico Bureau of Mines and Mineral Resources Memoir 12: 1–164. https://geoinfo.nmt.edu/publications/monographs/memoirs/downloads/12/Memoir-12.pdf.
Wikidata ☰ Q24896051 entry
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