Hyalopomatus sp. nov. 3

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

Hyalopomatus sp. nov. 3 Fig. 28G

Diagnosis.

Smooth white tube. Elongated operculum with distinctly differentiated endplate. Peduncle smooth, of same thickness as radioles, annulated distally, separated from operculum by a constriction. Five thoracic chaetigerous segments plus minute simple collar chaetae. Thoracic membranes short, ending at chaetiger 3. Collar high, trilobed, ventral lobe larger than lateral ones. Uncini rasp-shaped with very characteristic for the genus anterior peg made of two or more rounded lobes with shallow incision(s) in between. Apomatus chaetae absent. Abdominal chaetae in posterior chaetigers only, capillary with tip made of two rows of denticles.

Records.

3 specimens. Suppl. material 1: ops. 86, 97, 104 (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).