Echinocyamus meridionalis Clark and Twitchell 1915 (sand dollar)

Echinoidea - Clypeasteroida - Fibulariidae

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 Echinocyamus according to W. B. Clark and M. W. Twitchell 1915

See also Cooke 1942

Sister taxa: Echinocyamus bisexus, Echinocyamus chipolanus, Echinocyamus crispus, Echinocyamus huxleyanus, Echinocyamus intermedius, Echinocyamus parviporus, Echinocyamus parvus, Echinocyamus petalus, Echinocyamus polymorpha, Echinocyamus prostratus, Echinocyamus pusillus, Echinocyamus terminalis, Echinocyamus texanus, Echinocyamus vaughani, Echinocyamus wilsoni

Ecology: slow-moving semi-infaunal detritivore

Distribution: found only at Claiborne Landing (Eocene of Alabama)

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