Vrijenhoekia ketea Summers, Pleijel & Rouse, 2015 species complex

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

Vrijenhoekia ketea Summers, Pleijel & Rouse, 2015 species complex Fig. 12F

Diagnosis.

Prostomium rectangular, with two lateral antennae, a very small median antenna, two palps, and a facial tubercle. Palpophores thicker than palpostyles, similar lengths. No eyes. Everted proboscis lacking papilla. Three fused anterior segments. Parapodia uniramous. Dorsal cirri long, especially in segments 1-5. Ventral cirri the same length as neuropodia after segments 1-3, digitiform, and inserted subterminally. Colour in ethanol pale yellow.

Remarks.

The specimen differs from other specimens of the V. ketea species complex in having a larger body, being closer to the size range observed for V. balaenophila ( Pleijel et al. 2008).The Vrijenhoekia ketea species complex includes V. ketea Summers, Pleijel & Rouse, 2015, V. falenothiras Summers, Pleijel & Rouse, 2015 and V. ahabi Summers, Pleijel & Rouse, 2015, all from Monterey Canyon off California; they can only be separated based on molecular data ( Summers et al. 2015).

Records.

1 specimen. Suppl. material 1: op. 100 (NHMUK).

Figures

Figure 12. Hesionidae A Microphthalmus sp. B Microphthalmus sp., anterior end C Microphthalmus sp., pygidium D Neogyptis sp. nov. 1 (AM W. 52327) E Neogyptis sp. nov. 2 (AM W. 52436) F Vrijenhoekia ketea G cf. Vrijenhoekia sp. nov. 1 (AM W. 52453). Scale bars: 0.25 mm (A); 100 µm (B); 100 µm (C); 1 mm (E, F, G); 2 mm (D).