Echinoidea - Clypeasteroida - Protoscutellidae
Full reference: T. A. Conrad. 1866. Check list of the invertebrate fossils of North America: Eocene and Oligocene. Smithsonian Miscellaneous Collections 7:1-41
Parent taxon: Protoscutellidae according to J. W. Durham 1955
See also Clark and Twitchell 1915, Cooke 1942, Durham 1966, Kier 1968, Kier 1997 and Sepkoski 2002
Sister taxa: Mortonella, Protoscutella
Subtaxa: Periarchus altus Periarchus kewi Periarchus lyelli Periarchus pileussinensis Periarchus protuberans Periarchus quinquefarius Periarchus rutriformis
Ecology: slow-moving semi-infaunal detritivore
Distribution:
• Eocene of United States (82: Alabama, Florida, Georgia, Mississippi, North Carolina, South Carolina collections)
Total: 82 collections including 84 occurrences
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.