Bathyvermilia Zibrowius, 1973

Genus Bathyvermilia Zibrowius, 1973 View in CoL

Type species. Bathyvermilia challengeri Zibrowius, 1973 View in CoL

Generic diagnosis (after Kupriyanova & Ippolitov, 2015 emended). Tube white, opaque, circular to quadrangular in cross-section, keel(s) may present. Collar-like rings present. Operculum sub-globular, with simple flat to slightly conical chitinous endplate, sometimes encrusted by calcareous deposit. Peduncle cylindrical, either smooth or wrinkled, distal wings absent; inserted as 2 nd dorsal radiole on either side, constriction present. Pseudoperculum absent. Up to 35 radioles per lobe arranged in semi-circles. Inter-radiolar membrane, radiolar eyes, and stylodes absent. Mouth palps may present. Seven thoracic chaetigerous segments, six of which uncinigerous. Trilobed collar (may be not divided into lobes) with straight edge, tonguelets absent. Thoracic membranes of variable length, extending to 2 nd –7 th thoracic segment. Collar chaetae limbate capillaries. Apomatus View in CoL chaetae present. Thoracic uncini saw-shaped (rarely saw-to-rasp shaped), with 6–12 teeth and simple, pointed anterior fang. Abdominal chaetae flat narrow geniculate with blunt teeth.Anterior and mid-abdominal uncini saw-shaped, uncini on few far posterior segments rasp-shaped. Short achaetous anterior abdominal zone present. Posterior capillary chaetae present. Posterior glandular pad present.

Remarks. Ten Hove and Kupriyanova (2009) listed five bathyal and abyssal species in this genus ( Bathyvermilia challengeri , B. islandica Sanfilippo, 2001 , B. kupriyanovae Bastida-Zavala, 2008 , B. langerhansi (Fauvel, 1909) , and B. zibrowiusi Kupriyanova, 1993a ). Kupriyanova and Nishi (2010) added a species from the Patton-Murray Seamount, Gulf of Alaska by transferring Vermiliopsis (?) eliasoni Zibrowius, 1970 to the genus Bathyvermilia . Further Kupriyanova and Ippolitov (2015) added Bathyvermilia gregrousei to the genus and emended the generic diagnosis to include the species with tetragonal, slightly spirally twisted tubes.