Riseriopsis cf. santosae Salazar-Vallejo, Zhadan & Rizzo, 2019b

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

Riseriopsis cf. santosae Salazar-Vallejo, Zhadan & Rizzo, 2019b Fig. 9D, E

Diagnosis.

Prostomium retracted. Body linear with annulations, slightly inflated terminally with 27 chaetigers. Chaetigers 1-3 shorter, parapodia with one acicular and one capillary per ramus and an interramal papillae. Following chaetigers with one acicular and one capillary in the neuropodia and one larger acicular in the notopodia.

Remarks.

Riseriopsis santosae resembles this specimen but differs in having more chaetigers (37-88). Riseriopsis santosae is known from shallower depths (410-415 m), while the only described deep-sea species in the genus, R. confusa (Thiel, Purschke & Böggemann, 2011), has a similar number of chaetigers as this specimen, but with an acicular and capillary in the medial notopodia. Both of these species are recorded from the South Atlantic.

Rec ords.

1 specimen. Suppl. material 1: op. 96 (NHMUK).

Figures

Figure 9. Fauveliopsidae A Laubieriopsis hartmanae B L. hartmanae, chaetae C L. hartmanae, genital papilla D Riseriopsis cf. santosae E Riseriopsis cf. santosae, chaetae. Scale bars: 1 mm (A, D); 50 µm (B); 100 µm (C); 250 µm (E).