Ophelina cf. cirrosa ( Schueller , 2008)

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. cirrosa ( Schueller, 2008) Fig. 17A-C

Diagnosis.

Bluntly conical prostomium with slit-like nuchal organs. Eyes absent. Chaetigers 1-9 compressed, having more abundant chaetae. Midbody chaetigers longer than anterior and posterior chaetigers. Ventral and lateral grooves present along entire body. Fan-shaped parapodia. Branchiae from chaetiger 23 to chaetiger 30. Abranchiate chaetigers compressed, with the long chaetae directed dorsally. Anal funnel as long as last six posterior chaetigers, directed dorsally. Colour in ethanol white.

Remarks.

Observed specimens resemble Ammotrypanella cirrosa described from the Weddell Sea at 3050 m depth. These also possess an anal funnel with small cirri on the posterior margin but differ in having a large terminal ventral papilla instead of a ventral cirrus in the anal funnel. We followed the synonymy of Ammotrypanella and Ophelina as suggested by Blake and Maciolek (2019a).

Records.

76 specimens. Suppl. material 1: ops. 9, 11, 16, 23, 31, 76, 96, 134 (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).