Sphaerephesia sp. nov. 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

Sphaerephesia sp. nov. 1 Fig. 30D-G

Diagnosis.

Body ellipsoid (~ 3-5 mm, 15-20 chaetigers), flattened dorsoventrally wider than high; some preserved specimens with yellowish macrotubercles. Head with seven appendages, smooth, lacking basal papillae or spurs; paired appendages ~ 3 × as long as wide, bottle-shaped; median antenna slightly smaller. Antenniform papillae absent. Four longitudinal rows of dorsal macrotubercles, lateral rows closer to each other, one transverse row per segment. Macrotubercles sessile, hemispherical, and with a pointy distal end. Additional dorsal papillae hemispherical, ~ 15 per segment, arranged in four irregular transverse rows. Ventral papillae ~ 20 in mid-segments, arranged in four transverse rows. Parapodia with digitiform ventral cirri, reaching the tip of acicular lobe. Two or three spherical parapodial papillae. All chaetae compound, with blades 4-5 × as long as wide in mid-body segments.

Records.

51 specimens. Suppl. material 1: ops. 9, 16, 31, 33, 40, 45, 55; 66, 76, 79 (AM).

Figures

Figure 30. Sphaerodoridae A-C Clavodorum cf. longipes D-G Sphaerephesia sp. nov. 1 (D, stained with methyl blue) H-J Sphaerephesia sp. nov. 3 K, L Sphaerephesia sp. nov. 5 M, N Sphaerodorum sp. Scale bars: 100 µm (A, B, D, E, I-M); 1 mm (G, H); 10 µm (C, N).