Osedax, Gunton & Kupriyanova & Alvestad & Avery & Blake & Biriukova & Böggemann & Borisova & Budaeva & Burghardt & Capa & Georgieva & Glasby & Hsueh & Hutchings & Jimi & Kongsrud & Langeneck & Meißner & Murray & Nikolic & Paxton & Ramos & Schulze & Sobczyk & Watson & Wiklund & Wilson & Zhadan & Zhang, 2021

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

Osedax sp. nov. Fig. 27B, C

Diagnosis.

Siboglinid found colonising fin whale fall. Female living within tube and with ‘root’ structures embedded into bones. Females with crown of four palps fused for much of their length, without obvious pinnules but with distinct blood vessels in live specimens. Trunk short in relation to the length of the palps, ovisac was not observed. Tube: anterior thin, semi-transparent and appearing closed at the tip, posterior tougher and creased. Colour in ethanol pale yellow.

Remarks.

Genetic data confirm that these specimens are a new species that falls within the same clade as other nude palp Osedax species ( Georgieva et al. in prep) associated with whale falls.

Records.

More than 20 specimens. Suppl. material 1: op. 100 (NHMUK) (whale bones, MV).

Figures

Figure 27. Scalibregmatidae and Siboglinidae. Siboglinidae A Frenulate tube (op. 11) B Osedax sp. nov., preserved female specimen inside tube C Osedax sp. nov., detail of palps of preserved female specimen. Scalibregmatidae D Oligobregma sp. nov. 1 (AM W. 52686) E Oligobregma sp. nov. 1 (AM W. 52698). Scale bars: 2 mm (A, B); 500 µm (C); 1 mm (D, E).