Bathychloeia cf. sibogae Horst, 1910

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

Bathychloeia cf. sibogae Horst, 1910

Diagnosis.

Body short, ovate, ~ 8 mm in length. 17-18 chaetigers bearing long (3-44 mm) furcate chaetae. Body pale colour, pair of purple spots dorsal on chaetiger 6, visible under skin. Dark blue-black colouration visible under skin on chaetigers 10-13, dorsal and ventral. Caruncle lobed, extending to chaetiger 3. Branchiae branched, only found on chaetiger 5. Parapodia short, but neuro-and notochaetae well separated, neurochaetae lateral. Notochaetae dorsal (remaining tuft on chaetiger 7). Parapodial cirri on all (?) chaetigers, longer on final five. Chaetae long, bifurcate. No serrations or harpoon chaetae. Neurochaetae shorter than notochaetae. Faint membrane/covering visible over the furcate tips of some chaetae. Pygidium with thick anal cirrus, may be part of a pair.

Remarks.

The type locality of Bathychloeia sibogae is in the Banda Sea, Malay Archipelago 1158 m depth. Böggemann (2009) redescribed the species using the type material, material from the Canaries (~ 2800 m) and material from the abyssal SE Atlantic (~5000 m). The species is also recorded from 12 stations (138-2074 m) in the GAB ( MacIntosh et al. 2018: additional file 2). Due to the species broad distribution it is highly likely a species complex and thus we assign the name Bathychloeia cf. sibogae .

Records.

4 specimens: Suppl. material 1: ops. 96, 102, 103 (AM). 2 specimens Suppl. material 1: op. 110 (NHMUK).