Bathyvermilia sp. nov. 4

Gunton, Laetitia M., Kupriyanova, Elena K., Alvestad, Tom, Avery, Lynda, Blake, James A., Biriukova, Olga, Boeggemann, Markus, Borisova, Polina, Budaeva, Nataliya, Burghardt, Ingo, Capa, Maria, Georgieva, Magdalena N., Glasby, Christopher J., Hsueh, Pan-Wen, Hutchings, Pat, Jimi, Naoto, Kongsrud, Jon A., Langeneck, Joachim, Meissner, Karin, Murray, Anna, Nikolic, Mark, Paxton, Hannelore, Ramos, Dino, Schulze, Anja, Sobczyk, Robert, Watson, Charlotte, Wiklund, Helena, Wilson, Robin S., Zhadan, Anna & Zhang, Jinghuai, 2021, Annelids of the eastern Australian abyss collected by the 2017 RV ' Investigator' voyage, ZooKeys 1020, pp. 1-198 : 1

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).

Figures

Figure 28. Serpulidae A Bathyvermilia challengeri, tube only (AM W. 49722) B Bathyvermilia cf. kupriyanovae, tube only (AM W. 49707) C Bathyvermilia sp. nov. 3, specimen in white shiny tube (AM W. 49494) D Hyalopomatus dieteri, tube only (AM W. 49689) E Bathyvermilia sp. nov. 4, specimen in tube with high keel (AM W. 49448) F Hyalopomatus sp. nov. 2, specimen removed from the tube (AM W. 49727) G Hyalopomatus sp. nov. 3, specimen removed from the tube (AM W. 49494) H Protis sp. 3, specimen partly removed tube, with egg sacks (AM W. 49682) I Spirodiscus sp. nov., specimens in tubes (AM W. 49511). Scale bars: 2 mm (A, C); 10 mm (B, E); 1 mm (D, F, H); 0.5 mm (G); 2 mm (I).