Cidaris merriami Arnold 1908 (pencil urchin)

Echinoidea - Cidaroida - Cidaridae

Alternative combination: Hesperocidaris merriami

Full reference: R. Arnold. 1908. Descriptions of new Cretaceous and Tertiary fossils from the Santa Cruz Mountains, California. Proceedings of the United States National Museum 34(1617):345-389

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

See also Arnold 1908, Clark and Twitchell 1915 and Grant and Hertlein 1938

Sister taxa: Cidaris (Bramus), Cidaris (Cidaris), Cidaris (Protocidaris), Cidaris (Vernius), Cidaris admeto, Cidaris alabamensis, Cidaris alata, Cidaris alpis, Cidaris baculifera, Cidaris bechei, Cidaris blandis, Cidaris bowerbankii, Cidaris branneri, Cidaris californicus, Cidaris catenifera, Cidaris cojimarensis, Cidaris cornaliae, Cidaris cubensis, Cidaris curioni, Cidaris dilleri, Cidaris dixiensis, Cidaris fasciculata, Cidaris flexuosa, Cidaris fumagalli, Cidaris georgiana, Cidaris grandaeva, Cidaris guembeli, Cidaris klipsteini, Cidaris liagora, Cidaris lorenzanus, Cidaris loveni, Cidaris martinezensis, Cidaris mazzettii, Cidaris modestus, Cidaris moereus, Cidaris mortoni, Cidaris omboni, Cidaris ordinatus, Cidaris parastadifera, Cidaris perdubius, Cidaris perornata, Cidaris plumasensis, Cidaris pratti, Cidaris remiger, Cidaris roemeri, Cidaris schlonbachi, Cidaris serrifera, Cidaris shastensis, Cidaris sinaiensis, Cidaris smithi, Cidaris splendens, Cidaris subnobilis, Cidaris subnodosa, Cidaris taylorensis, Cidaris tehamaensis, Cidaris texanus, Cidaris thouarsii, Cidaris tribuloides, Cidaris tubuloides, Cidaris vafellus, Cidaris wahalakensis, Cidarites tribuloides

Type specimen: USNM 165438, a partial shell (imperfect spine)

Ecology: slow-moving low-level epifaunal grazer-omnivore

Distribution:

• Eocene of United States (2: California collections)

• Paleocene of United States (1: California)

Total: 3 collections each including a single occurrence

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Specimen images are retrieved through the ePANDDA API.


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