Catillopecten sp. (NHM_105)

Wiklund, Helena, Taylor, John D., Dahlgren, Thomas G., Todt, Christiane, Ikebe, Chiho, Rabone, Muriel & Glover, Adrian G., 2017, Abyssal fauna of the UK- 1 polymetallic nodule exploration area, Clarion-Clipperton Zone, central Pacific Ocean: Mollusca, ZooKeys 707, pp. 1-46 : 18-19

Catillopecten sp. (NHM_105)

Material examined.

NHM_105 NHMUK 20170070, collected 2013-10-11, 13.79335 -116.70308, 4081 m. http://data.nhm.ac.uk/object/24f5c5bb-e419-48ef-baaa-4a6493f691d9

Description.

Small, thin-shelled, subcircular. Right valve flat, left valve slightly convex. Both valves with commarginal undulations that become stronger towards the margin, fine radial striations on both valves. Well defined anterior auricle and byssal notch. Voucher NHM_105 1.8 mm shell length, height 1.5 mm (Fig. 16).

Genetic data.

GenBank NHM_105 18S-MF157469.

Remarks.

Holotype (ZMUC) from Gulf of Panama, 3270-3670 m Galathea stn 726, figured by Coan and Valentich-Scott (2012 pl. 100). In the molecular tree it groups with two other species of Propeamussidae on a long branch and distinct from other Pectinoida , but a GenBank species (VLG_2013) identified as Propeamussium sp. is distinct from these (Fig. 17). Henk H. Dijkstra (Naturalis Biodiversity Center in Leiden, Netherlands) advised on identification of this species. Forms a unique monophyletic clade distinct from all other AB01 specimens. No genetic matches on GenBank.

Ecology.

Found in polymetallic nodule province.