Bathyvermilia Zibrowius, 1973

Kupriyanova, Elena K. & Ippolitov, Alexei P., 2015, Deep-sea serpulids (Annelida: Polychaeta) in tetragonal tubes: on a tube convergence path from the Mesozoic to Recent, Zootaxa 4044 (2), pp. 151-200 : 171

Genus Bathyvermilia Zibrowius, 1973

Bathyvermilia Zibrowius, 1973: 428 .— Sanfilippo 2001: 177 –178.—ten Hove & Kupriyanova 2009: 29 –30.—Kupriyanova et al. 2011: 4, 7.

Type-species: Bathyvermilia challengeri Zibrowius, 1973

Diagnosis (after ten Hove & Kupriyanova 2009, emend.): Tube white, opaque, circular to quadrangular in cross-section. Peristomes may be present. Operculum sub-globular, with simple flat to slightly conical chitinous endplate, sometimes encrusted by calcareous material. Peduncle cylindrical, smooth or wrinkled, distal wings absent; inserted as 2nd 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 present or absent. Seven thoracic chaetigerous segments, 6 of which uncinigerous. Trilobed collar (may be not divided into lobes in some taxa) with straight edge, tonguelets between ventral and lateral collar parts absent. Thoracic membranes of variable length, extending to 2nd–7th thoracic segment. Collar chaetae limbate capillaries. Apomatus chaetae present. Thoracic uncini saw-shaped, with 6–10 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 may be present. Posterior capillary chaetae present. Posterior glandular pad usually present, but may be absent.

Remarks. The genus currently includes 6 bathyal and abyssal species (Kupriyanova et al. 2011). The diagnosis has been emended to include the species with tetragonal tubes.