Sphaerephesia sp. nov. 3

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. 3 Fig. 30H-J

Diagnosis.

Body ellipsoid (~ 1-5 mm, 20-28 chaetigers), flattened dorsoventrally wider than high. Some preserved specimens with small dark pigment spots in dorsal macrotubercles. Head with seven appendages, smooth, lacking basal papillae or spurs; ~ 5 × as long as wide, bottle shaped; median antenna slightly smaller. Antenniform papillae present, shorter and thinner than median antennae. Four longitudinal rows of dorsal macrotubercles, one transverse row per segment. Macrotubercles sessile, pear-shaped. Additional dorsal papillae hemispherical, ~ 40 per segment, arranged in ~ four irregular transverse rows in mid-body segments. Ventral papillae ~ 20-30 in mid-body segments, arranged in more or less clear transverse rows. Parapodia stout, with prominent acicular lobe and bottle-shaped ventral cirri, reaching the tip of acicular lobe. more than ten parapodial papillae, spherical. All chaetae compound (> ten), with blades ~ 7-10 × as long as wide in mid-body segments.

Records.

30 specimens. Suppl. material 1: ops. 9, 16, 23, 31, 33, 42, 45, 46, 54, 55, 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).