Scalpellum knapptonensis, Zullo, V. A., 1982

Zullo, V. A., 1982, '' Arcoscalpellum' ' Hoek and '' Solidobalanus' ' Hoek (Cirripedia, Thoracica) from the Paleogene of Pacific County, Washington, with a description of a new species of '' Arcoscalpellum' ', Contributions in Science of the Natural History Museum of Los Angeles County 336, pp. 1-9 : 4

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