Gastropoda - Epitonioidea - Epitoniidae

Alternative combination: Epitonium (Opalia) rugiferum

Belongs to Opalia (Opalia) according to J. W. Durham 1937

Sister taxa: Opalia (Opalia) bravinderi, Opalia (Opalia) wishkahensis

Type specimen: USNM 135121

Ecology: slow-moving low-level epifaunal carnivore

Distribution: found only at Pyramid Hill Sand Member grit zone (Oligocene of California)

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Specimen images are retrieved through the ePANDDA API.