Maldanella sp. 1

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

Maldanella sp. 1 Fig. 14E

Diagnosis.

Single complete specimen with 19 chaetigers and three preanal achaetous segments, 80 mm long and 4 mm wide. Additional numerous anterior fragments and a few posterior fragments available. Head with oval cephalic plate. Cephalic rim well developed with minute lateral incisions. Cephalic palpode very small, rounded. Cephalic keel not visible. Nuchal slits straight and parallel, not outward-curved anteriorly, on anterior one third of the cephalic plate. Neurochaetae as rostrate hooks, in single rows from chaetiger two onwards. Notochaetae as simple capillaries in two rows in all chaetigers. Posterior achaetous region with three achaetous segments with rudimentary parapodia, and a well-developed pygidial funnel. Posterior rim of anal funnel rimmed with triangular cirri. Anus on small cone inside anal funnel. Tube greyish, thin and flexible, loosely incrusted by fine sand particles. Specimens in alcohol uniformly pale.

Remarks.

Species of Maldanella (including Abyssoclymene as synonym) are common members of abyssal soft bottom fauna ( McIntosh 1885; Detinova 1982; Kongsrud et al. 2013). However, the taxonomy of the genus is confused with several species being poorly characterized. The present material includes two species, here reported as Maldanella sp. 1 and Maldanella sp. 2 (see below). A single specimen, provisionally referred to the genus Maldanella , was recorded from 376 m depth in the GAB ( MacIntosh et al. 2018: additional file 2).

Records.

107 specimens. Suppl. material 1: ops. 4, 6, 22, 35, 44, 56, 128 (AM).

Figures

Figure 14. Maldanidae A Boguea sp. nov. B Chirimia sp. nov. C Lumbriclymene sp. D Maldane sp. E Maldanella sp. 1 F Maldanella sp. 2 G Notoproctus sp. nov. 1 H Notoproctus cf. scutiferus I Notoproctus oculatus antarcticus J Notoproctus sp. nov. 2. Scale bars: 5 mm (A, D, F); 1 mm (B, C, G-J).