Sismondia Desor 1858 (sand dollar)

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

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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

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Specimen images are retrieved through the ePANDDA API.


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