Pista sp.

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

Pista sp.

Diagnosis.

Glandular lobes on segments 2-4 of variable sizes and positions, and segment 1 reduced dorsally with pair of glandular lobes. Branchiae arborescent, pectinate or plumose from segment 2, typically two pairs on segments 2 and 3, rarely a single pair or three pairs. Seventeen pairs of smooth tipped winged notochaetae from segment 4. Neuropodia from segment 5, as long handled avicular uncini at least on anterior segments arranged in single rows, then arranged in double rows until end of thorax, reverting to single rows to pygidium.

Remarks.

Specimens of Pista were in poor condition. They probably represent at least two species, but branchiae and lateral lobes, critical characters to distinguish species, are damaged and in many cases incomplete, including posterior thorax. Molecular data may help in distinguishing between species.

Records.

23 specimens. Suppl. material 1: ops. 4, 22, 30, 35, 56, 67 (AM).