Hemiaster beecheri Clark and Twitchell 1915 (heart urchin)

Echinoidea - Spatangoida - Hemiasteridae

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 Hemiaster according to C. W. Cooke 1953

See also Clark and Twitchell 1915

Sister taxa: Hemiaster (Bolbaster), Hemiaster (Gregoryaster), Hemiaster (Hemiaster), Hemiaster (Holanthus), Hemiaster (Integraster), Hemiaster (Leymeriaster), Hemiaster (Trachyaster), Hemiaster aequisgranensis, Hemiaster alamedensis, Hemiaster amelianus, Hemiaster antillensis, Hemiaster arcolensis, Hemiaster arcticus, Hemiaster bufo, Hemiaster californicus, Hemiaster calvini, Hemiaster cholamensis, Hemiaster comanchei, Hemiaster delawarensis, Hemiaster dewalquei, Hemiaster elegans, Hemiaster globulosus, Hemiaster gonzalezmunozi, Hemiaster hattaensis, Hemiaster humphreysanus, Hemiaster kuemmeli, Hemiaster moscovensis, Hemiaster oregonensis, Hemiaster parastatus, Hemiaster paronai, Hemiaster proclivus, Hemiaster sabinal, Hemiaster sibiricus, Hemiaster stella, Hemiaster texanus, Hemiaster ungula, Hemiaster welleri, Hemiaster wetherbyi

Type specimen: YPM 1863. Its type locality is Redding, which is in a Cretaceous marine horizon in the Chico Formation of California.

Ecology: slow-moving shallow infaunal deposit feeder-detritivore

Distribution:

• Cretaceous of United States (2: California, South Dakota collections)

Total: 2 collections each including a single occurrence

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Specimen images are retrieved through the ePANDDA API.


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