Parahesiocaeca 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

Parahesiocaeca sp. 1

Diagnosis.

Specimens in poor condition, incomplete. Prostomium sub-rectangular, with three antennae, all tapering rapidly and broader at base, extending just beyond tip of palps. Bi-articulated palps, palpostyle cylindrical. Eyes absent. Proboscis with marginal papillae. First two segments tentacular, achaetous, bearing four pairs of tentacular cirri (inferred from stubs). Tentacular and dorsal cirri appearing to be articulated. Parapodia sub-biramous. Neuropodia with long prechaetal lobe, short postchaetal lobe, and short ventral cirrus; all neurochaetae with long-bladed heterogomph falcigers with very fine tips.

Remarks.

The present specimens fit the description of the genus Parahesiocaeca Uchida, 2004, although it differs from the description of the only species, P. japonica Uchida, 2004, in lacking eyes, having brown-pigmented nuchal organs, and the heterogomph falcigers having very long blades with very fine tips. The specimens probably represent an undescribed species, but their condition is too poor to describe as a new species.

Records.

2 specimens. Suppl. material 1: op 96 (AM).