Neogyptis sp. nov. 2

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

Neogyptis sp. nov. 2 Fig. 12E

Diagnosis.

Specimens incomplete. Prostomium subrectangular (broader than long), posteriorly with slight mid-dorsal incision; antennae, presence implied from scars as follows: two lateral and one median antenna situated mid-posteriorly. Eyespots not visible. Palps bi-articulate, palpostyle cylindrical to conical, approximately equal in length to palpophore. Everted proboscis with many cushion-shaped distal papillae. First four segments tentacular, achaetous, bearing eight pairs tentacular cirri, slightly shorter than dorsal cirri of chaetiger 1. Nuchal organs, unpigmented, coalescing mid-dorsally. Parapodia biramous throughout, dorsal cirri slender tapered, ~ equal in length to parapodial lobes, except those on first chaetiger which are many times longer than parapodial lobe; ventral cirri distally attached, slender tapered, ~ half-length parapodial lobes throughout. Notopodia bearing serrated capillaries and one or two smooth spines. Neurochaetae all compound spinigers. Colour in ethanol yellow-white, unpigmented.

Remarks.

See above for discussion justifying placement of this material into Neogyptis , tribe Amphidurini Pleijel, Rouse, Sundkvist & Nygren, 2012, and reasons for considering it represents an undescribed species. Neogyptis sp. 2 differs from Neogyptis sp. 1 in having palpostyles approximately equal in length to the palpophore, and lacking brown pigmentation on tentacular segments and the nuchal organs.

Records.

2 specimens. Suppl. material 1: ops. 16, 110 (AM).

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).