Chthamalid Barnacles of Easter Island; Peripheral Pacific Isolation of Notochthamalinae New Subfamily and Hembeli-Group of Euraphiinae (Cirripedia: Chthamaloidea)

Euraphia devaneyi new species (of the hembeli-group) is described from Easter Island. Rehderella belyaevi (Zevina and Kurshakova) new genus is given a supplementary description and its range extended from Easter Island to Pitcairn Island. Consideration of the pleisomorphies and apomorphies of R. belyaevi and related genera necessitates recognition of the Notochthamalinae, a new subfamily of South Pacific species with card setae on some or all of the anterior cirri. Diagnoses are given for Notochthamalus new genus, for N. scabrosus from South America, Nesochthamalus new genus, for N. intertextus from widespread west Pacific localities, and Charnaesipho Darwin containing three species from New Zealand and Australia. Both chthamalids of Easter Island are peripheral Polynesian endemics, and the historical biogeography of this in connection with such young islands is discussed.