Hyalopomatus sp. nov. 2

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. 2 Fig. 28F

Diagnosis.

White smooth tubes completely attached to substrate, without external sculpture, except for several indistinct transverse ridges. Nearly globular, only slightly elongated semi-transparent, undifferentiated operculum. Peduncle of the same width as radioles, smooth, without distinct constriction. Thoracic membranes with rounded edges ending right after chaetiger 2. Collar trilobed, ventral lobe larger than lateral ones, covering radiolar lobes and half of radioles. Five thoracic chaetigers plus collar chaetae bundle including special fin-and-blade chaetae. Uncini rasp-shaped with very characteristic for the genus anterior peg made of two (thoracic) or three or four (abdominal) rounded lobes with shallow incision(s) in between. Apomatus chaetae absent. Abdominal chaetae unknown.

Records.

1 specimen. Suppl. material 1: op. 100 (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).