Bathyvermilia sp. nov. 4 Fig. 28E

Diagnosis.

White tubes attached to substrate throughout their length, triangular in cross-section with high smooth keels. Five thoracic chaetigerous segments plus simple collar chaetae. Peduncle smooth thin, slightly thickened distally, separated by a distinct constriction from elongated conical operculum, covered with distinct brownish flat chitinous endplate. Apomatus chaetae present. Abdominal chaetae short, with flat triangular denticulate blade. Uncini with pointed anterior fang.

Remarks.

This species differs from other species of Bathyvermilia by having only six thoracic chaetigerous segments (which is typical for representatives of the genus Hyalopomatus) and triangular in cross-section tube without peristomes. It was the most abundant serpulid collected during the voyage.

Records.

661 specimens. Suppl. material 1: ops. 4, 14, 56, 78, 97, 99, 102, 109, 128, 135 (AM).