Sismondia arnoldi Clark and Twitchell 1915 (sand dollar)

Echinoidea - Clypeasteroida - Laganidae

Full reference: W. B. Clark and M. W. Twitchell. 1915. The Mesozoic and Cenozoic Echinodermata of the United States. United States Geological Survey Bulletin 54:1-341

Belongs to Sismondia according to W. S. W. Kew 1920

See also Clark and Twitchell 1915

Sister taxa: Sismondia coalingaensis, Sismondia convexa, Sismondia javana

Ecology: slow-moving semi-infaunal detritivore

Distribution:

• Quaternary of United States (1: California collection)

• Miocene to Pliocene of United States (1: California)

Total: 2 collections each including a single occurrence

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Specimen images are retrieved through the ePANDDA API.


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