Aglaophamus, Gunton & Kupriyanova & Alvestad & Avery & Blake & Biriukova & Böggemann & Borisova & Budaeva & Burghardt & Capa & Georgieva & Glasby & Hsueh & Hutchings & Jimi & Kongsrud & Langeneck & Meißner & Murray & Nikolic & Paxton & Ramos & Schulze & Sobczyk & Watson & Wiklund & Wilson & Zhadan & Zhang, 2021

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

Aglaophamus spp. Fig. 2D, F

Diagnosis.

Prostomium rectangular with anteriorly-projecting lateral antennae and ventro-laterally-projecting palps. Nuchal glands present in posterior corners of prostomium. No eyes observed. Body tapering posteriorly. Parapodia of first chaetiger directed anteriorly, neuropodia projecting forward beside the prostomium while the notopodia shorter and without dorsal cirri. Following parapodia distinctly biramous, with dorsal and ventral cirri. Involute interramal cirri present from chaetiger 8 or 12-15, emerging from notopodia only. Preacicular chaetae barred (Fig. 2D ), postacicular chaetae spinulose, neuropodial chaetae of chaetiger 1 simple capillaries.

Remarks.

Preliminary molecular work using 16S gene on these specimens has separated them into three clades, each clade restricted to either lower bathyal or abyssal depths ( Ramos 2019). Aglaophamus gippslandicus Rainer & Hutchings, 1977 (six stations, 138-141 m), A. profundus Rainer & Hutchings, 1977 (one specimen, 3714 m), and Aglaophamus sp. MoV7086 (one specimen, 3465 m) were recorded from the GAB ( MacIntosh et al. 2018: additional file 2). Further investigation is needed to confirm if any of these GAB species are the same as the ones from this study.

Records.

17 specimens. Suppl. material 1: ops. 5, 16, 31, 33, 40, 45, 54, 66, 76, 79, 110, 119 (NHMUK). 65 specimens. Suppl. material 1: ops. 16, 23, 31, 33, 40, 45, 46, 54, 55, 76, 134 (AM).

Figures

Figure 2. Acoetidae, Chrysopetalidae, Nephtyidae, Oweniidae A Acoetidae, Panthalis sp., dorsal view (AM W. 50321) B Chrysopetalidae, Dysponetus cf. caecus, dorsal view C Dysponetus cf. caecus, ventral view D Nephtyidae, Aglaophamus sp. pre- and post-acicular chaetae E Nephtyidae, Nephtys cf. paradoxa (AM W. 52750) F Nephtyidae, Aglaophamus sp. G Oweniidae, Myriowenia sp. in tube (AM W. 51842). Scale bars: 2 mm (A); 1 mm (B, C); 50 µm (D); 5 mm (E, G); 3 mm (F).