Eranno, 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

Eranno sp. nov. Fig. 13D, E

Diagnosis.

Prostomium conical, as long as wide, shorter than peristomium. Nuchal antenna absent. All parapodia well developed, first four to five pairs of parapodia smaller than remaining parapodia. Prechaetal lobes inconspicuous in all parapodia, postchaetal lobes auricular in anterior parapodia (1-40), becoming small and rounded posteriorly, always longer than prechaetal lobes.

Anterior parapodia with limbate chaetae and limbate simple hooded hooks. Clear simple multidentate hooded hooks present after chaetiger 25, with seven to eight teeth and long blades, all of similar size. In median chaetigers (27-40) part of limbate chaetae exceedingly longer than in the remaining chaetigers and ~ twice as long as hooded hooks.

Maxillary apparatus dark, with five pairs of maxillae, elongated. Maxillary carriers shorter than MI. MI forceps-like with attachment lamellae, with narrow connecting plates. MII shorter than MI, with five teeth. MIII unidentate, completely pigmented, dark in colour. MIV unidentate, large, completely pigmented. MV reduced to attachment lamella, partly fused with MIV.

Remarks.

Limbate simple hooded hooks are not typical for Eranno and similar to those reported for Abyssoninoe , however, maxillary apparatus is of typical Eranno shape with narrow connecting plates and MII significantly shorter than MI. There is not enough information to consider this a new genus, but we suggest it is a new species.

Records.

1 specimen. Suppl. material 1: op. 56 (AM).

Figures

Figure 13. Lumbrineridae A Cenogenus sp. nov. (AM W. 50139), parapodium from chaetiger 7 B Cenogenus sp. nov., posterior parapodium C Cenogenus sp. nov., maxillae D Eranno sp. nov., AM W. 50140, parapodium from chaetiger 11 E Eranno sp. nov., maxillae F Lumbrineris sp., op. 4 (NHMUK), anterior part of the body, dorsal view G Lumbrineris sp., simple hooded hooks. Abbreviations: Mc, maxillary carriers; MI-MIV, maxillary plates. Scale bars: 200 µm (A, B, D); 500 µm (C, E); 5 mm (F); 25 µm (G).