Leitoscoloplos cf. kerguelensis (McIntosh, 1885)

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

Leitoscoloplos cf. kerguelensis (McIntosh, 1885) Fig. 18C

Diagnosis.

Incomplete specimen, 5 mm long, 0.4 mm wide, consisting of 21 chaetigers. Body cylindrical, thoracic segments short, abdominal segments long. Prostomium conical with round tip, one peristomium ring. Nine thoracic chaetigers. Branchiae from chaetiger 17-19, exact position unknown. Thoracic postchaetal lobes short conical in anterior thorax, becoming long and oval in middle and posterior parts; notopodial lobes longer. No subpodial or stomach papillae. Abdominal parapodia small, with short lobes. Notopodia oval, shorter than in thorax; neuropodia weakly bilobed, with short subequal lobes. Chaetae supposedly all crenulated capillaries, but mostly broken; presence of uncini or forked chaetae unknown. Colour in ethanol white.

Remarks.

Leitoscoloplos kerguelensis is widespread in Antarctic and subantarctic seas, intertidal to 1400 m; it has 8-10 thoracic chaetigers and branchiae from chaetigers 13-17 ( Blake 2017). The specimen studied here has close affinities with this species due to the number of thoracic chaetigers, late beginning of branchiae and the shape of postchaetal lobes. Due to the absence of accurate information on branchiae position, chaetal structure, the large distance from the species area, and bathymetric difference of material collected in this study we suggest the name Leitoscoloplos cf. kerguelensis .

Records.

1 specimen. Suppl. material 1: op. 96 (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).