Meeting Abstract

P3-39  Saturday, Jan. 7 15:30 – 17:30  Iphionidae (Aphroditiformia, Annelida) from Pacific Hydrothermal Vents MCCOWIN, MF*; ROUSE, GW; Univ. of California, San Diego; Univ. of California, San Diego mmccowin@ucsd.edu

The scaleworm family Iphionidae consists of five genera. Of these, Thermiphione has two accepted species, both native to hydrothermal vents in the Pacific; Thermiphione fijiensis (West Pacific vents) and Thermiphione tufari (East Pacific Rise vents). Iphionella is also known from the Pacific, and has two recognized species; Iphionella risensis (East Pacific Rise vents) and Iphionella philippinensis (West Pacific deep sea). In this study, phylogenetic analyses of Iphionidae from hydrothermal vents across the Pacific were conducted utilizing mitochondrial (COI and 16S rRNA) and nuclear (18S and 28S rRNA) genes. This revealed a new species in this clade, corroborated by additional morphology. The analyses also showed the paraphyly of Thermiphione with respect to Iphionella, and various taxonomic solutions are discussed.