Who Lives in the Hot Heart of the Cold Sea? A New Species of Provanna (Caenogastropoda: Provannidae) from the Hydrothermal Zone of Piip Volcano, Northwestern Pacific

The benthic macrofauna of Arctic and subarctic seas is mainly represented by widespread species generally devoid endemics. exceptions are reduced habitats, such as cold seeps, hydrothermal areas, wood falls, which include endemics at least the level. A detailed study analysis allows us to understand mechanisms colonization assess age fauna high-latitude marine regions. Here, new Provanna annae sp. nov. described from geothermal zone Piip volcano in Bering Sea (subarctic Pacific) based on morphological molecular phylogenetic data. appears be northernmost one most shallow-water among known representatives family suggested endemic region. related a group reducing habitats off Japan. Composition gut content indicates that bottom sediments. Bacteria found gills mollusc probably symbionts also provide nutrition. This type mixotrophic feeding rare gastropods may unique feature Caenogastropoda.