Echinoidea - Clypeasteroida - Laganidae
Full reference: E. Desor. 1858. Synopsis des échinides fossiles. Reinwald, Paris 1-490
Parent taxon: Laganidae according to J. W. Durham 1955
See also Clark and Twitchell 1915, Durham 1966, Kew 1920, Nisiyama 1968 and Sepkoski 2002
Sister taxa: Fibulina, Hupea, Jacksonaster, Laganinae, Laganum, Neolaganinae, Peronella, Peronellites, Rumphia
Subtaxa: Sismondia arnoldi Sismondia coalingaensis Sismondia convexa Sismondia javana
Ecology: slow-moving semi-infaunal detritivore
Distribution:
• Miocene to Pliocene of United States (2: California collections)
• Oligocene of Antigua and Barbuda (1), Oman (1)
• Eocene of Egypt (2), Germany (1), Libya (2), Romania (1)
Total: 10 collections including 11 occurrences
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.