Arcoscalpellum

Arcoscalpellum is a large genus of stalked barnacles found worldwide. It is classified in the family Scalpellidae, subfamily Scalpellinae, and species are found from shallow waters down to depths of over 5 kilometres. The genus is well-represented in the fossil record as far back as the Cretaceous period.

== Taxonomy == Arcoscalpellum was first described in 1907 by Dutch zoologist Paulus P. C. Hoek as a section of the genus Scalpellum, in his account of barnacles found in an expedition to Sibolga. Hoek viewed the section, defined in part by a bowed carina, as less primitive than the species with a straight or angularly bent carina, which he put in the sections Protoscalpellum and Euscalpellum respectively. The type species is Scalpellum (Arcoscalpellum) velutinum by original designation, but that species is considered a junior subjective synonym of Arcoscalpellum michelottianum. The genus Holoscalpellum, described by Henry Augustus Pilsbry, is an exact synonym of Arcoscalpellum according to Pilsbry himself.''