Cephalopoda - Ellesmerocerida - Rioceratidae
Full reference: R. H. Flower. 1964. The Nautiloid Order Ellesmeroceratida (Cephalopoda). State Bureau of Mines and Mineral Resources New Mexico Institute of Mining and Technology, Memoir 12:234 p.
Parent taxon: Rioceratidae according to B. Kröger and B. Lefebvre 2012
See also Crick 1981, Hook and Flower 1977 and Kröger and Evans 2011
Sister taxon: Felinoceras
Subtaxa: Rioceras consuetum Rioceras dartoni Rioceras depressum Rioceras escandei Rioceras expansum Rioceras fusiforme Rioceras lobatum Rioceras nondescriptum Rioceras tubulare Rioceras wellsi
Type: Rioceras nondescriptum
Ecology: nektobenthic carnivore
Distribution:
• Canadian of United States (1: Maryland collection)
• Ordovician of France (5), Morocco (1), United States (6: Minnesota, Nevada, New Mexico, Texas)
• Tremadoc of Mexico (1)
Total: 14 collections including 20 occurrences
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.