Protoaricinae, 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

Protoaricinae gen. spp. Fig. 18F

Diagnosis.

Body long and thin, <95 chaetigers, <15 mm long and 0.5 mm wide; without clear division on thorax and abdomen; parapodia not shifting dorsally in posterior segments. Prostomium short, bluntly conical with round tip; two peristomial rings. Branchiae from chaetiger 15-30 as short lobes, becoming very long and prominent on posterior segments. Parapodia with widely arranged rami, chaetal tufts emerging from low tubercles. Anterior neuropodia without postchaetal lobes, short conical lobes appearing ~ chaetiger 7 or beyond, becoming long posteriorward, disappearing in posterior segments; some specimens without neuropodial lobes. No notopodial postchaetal lobes. Notopodia and neuropodia with crenulated capillaries and long thin acicular spines in all segments; spines absent in juveniles. Pygidium with two lobes. Colour in ethanol white.

Remarks.

Genus is uncertain, probably new. Two morphospecies: one with neuropodial postchaetal lobes and another without.

Records.

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

Figures

Figure 18. Orbiniidae A Berkeleyia sp. (op. 79) B Leitoscoloplos cf. abranchiatus (op. 54) C Leitoscoloplos cf. kerguelensis (op. 96) D Leitoscoloplos sp. 1 (op. 30) E Orbiniella cf. aciculata (op. 42) F Protoaricinae gen. sp. (op 100). Scale bars: 500 µm (A, C, E); 2 mm (B, D); 1 mm (F).