Paramphinome cf. australis Monro, 1930

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

Paramphinome cf. australis Monro, 1930 Fig. 5C, D

Diagnosis.

Body shape elongate ~ 3 mm length. Eyes absent. Prostomium rounded. One or two strongly curved hooks on chaetiger 1 (Fig. 5D ) depending on body size (smaller individuals one hook, larger individuals two hooks). Arborescent branchiae beginning on chaetigers 4-7. Notochaetae capillary chaetae with step-like serrations and smooth unadorned spines. Notoacicula two per fascicle. Neurochaetae long thin capillaries with basal spurs, long thin capillaries no basal spurs, subdistally inflated bifurcate chaetae serrated prongs. Neuroacicula two per fascicle. Pygidium unadorned.

Remarks.

A redescription of Paramphinome australis is given in Böggemann (2009). Current specimens differ from Paramphinome australis in the number of strongly curved hooks numbering one or two, not two or three as in Böggemann (2009). No difference in thickness of notochaetae spines, whereas in Böggemann (2009) notochaetal spines are thicker in outer and thinner in inner positions. The type locality of Paramphinome australis is Antarctic Ocean off South Orkney Islands 244-344 m, Böggemann’s (2009) redescription was based on samples from Angola Basin 3945-3992 m, the distribution is recorded as from Antarctic and Subantarctic regions from subtidal to abyssal depths. This broad distribution suggests a species complex.

Records.

40 specimens. Suppl. material 1: op. 100 (AM).

Figures

Figure 5. Amphinomidae A Linopherus sp. 1, bipinnate branchiae B Linopherus sp. 1, antennae and palps C Paramphinome cf. australis D Paramphinome cf. australis, hooks E Pareurythoe sp. (AM W. 52611) F Amphinomidae gen. sp. juveniles (AM W. 52607). Scale bars: 250 µm (A); 100 µm (B); 1 mm (C, F); 50 µm (D); 3 mm (E).