Ophelina cf. helgolandiae Augener, 1912

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

Ophelina cf. helgolandiae Augener, 1912 Fig. 17D, E

Diagnosis.

Prostomium triangular, longer than wide with oval palpode. Four annuli on prostomium revealed using Shirlastain. Eyes absent. 32 chaetigers. Chaetigers 2-7 having more abundant chaetae. Chaetigers 25-32 ventrally located and compressed. Branchiae on chaetigers 2-5, then on chaetigers 25-32. Anal funnel slightly longer than the last two posterior chaetigers, directed dorsally, with thickened ventral keel and small terminal cirri.

Remarks.

Observed specimens closely resemble Ophelina helgolandiae Augener, 1912, which is recorded from the Nordic Seas at depths of 600-1300 m ( Kongsrud et al. 2011), but differ in having a pointed, annulated prostomium and lacking branchiae in the midbody chaetigers.

Records.

8 specimens. Suppl. material 1: ops. 23, 27, 40, 76 (NHMUK).

Figures

Figure 17. Opheliidae A Ophelina cf. cirrosa B Ophelina cf. cirrosa, posterior end C Ophelina cf. cirrosa, anterior end D Ophelina cf. helgolandiae E Ophelina cf. helgolandiae, prostomium F Ophelina cf. bowitzi, branchiae with blister-shaped bumps G Ophelina cf. bowitzi, anal funnel. Scale bars: 3 mm (A); 0.5 mm (B, C); 5 mm (D); 0.25 mm (E, F); 1 mm (G).