Parathyasira coani Kamenev 2023, sp. nov.

• Published in: Civilisations
• Main Author: Kamenev, Gennady M.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2023
• Subjects: Biodiversity; Taxonomy; Animalia; Mollusca; Bivalvia; Lucinida; Thyasiridae; Parathyasira; Parathyasira coani; Pacific; Kamchatka Peninsula; Kamchatka
• Online Access: https://zenodo.org/record/7573251; https://doi.org/10.5281/zenodo.7573251

Parathyasira coani sp. nov. urn:lsid:zoobank.org:act: B88594C5-63A1-4111-909B-D2359BB41965 Figs 2–6, Table 1 Parathyasira sp. 2 – Kamenev 2015: 191. Parathyasira sp. – Kamenev 2019: 6. Diagnosis Shell medium in size (to 7.5 mm in length), obliquely-rhomboidal, slightly drawn out anteriorly. Sculpture of closely spaced commarginal riblets and weak undulations. Second posterior fold weak. Posterior sulcus weak. Escutcheon long, deep. Lunule long, flat, weakly defined. Ligament well visible externally, long. Prodissoconch large (to 250 µm) with 5 lamellated folds. Lateral body pouches large, extensively lobed. Foot distally bulbous; bulbous portion not divided into two distinct parts; heel absent. Etymology The species epithet honors Dr Eugene V. Coan, a well-known researcher of eastern Pacific bivalves who made an enormous contribution to the study of the bivalve fauna of the Pacific Ocean. Material examined Holotype PACIFIC OCEAN • abyssal plain adjacent to the southern part of the Kuril-Kamchatka Trench; 39°43.80′ N, 147°10.16′ E –39°42.49′ N, 147°09.37′ E; depth 5224– 5215 m; 1 Sep. 2012; A. Brandt leg.; epibenthic sledge, RV Sonne, cruise no. 223, stn. 12-4; MIMB 43813. Paratypes PACIFIC OCEAN • 2 specs; same locality as for holotype; 40°13.26′ N, 148°06.24′ E –40°12.37′ N, 148°05.43′ E; depth 5348–5350 m; epibenthic sledge; 30 Aug. 2012; A. Brandt leg.; RV Sonne, cruise no. 223, stn. 11-9; SMF 367801 • 1 spec.; same collection data as for preceding; MIMB 43814 • 1 spec.; same locality as for holotype; 40°13.10′ N, 148°06.45′ E –40°12.10′ N, 148°06.45′ E; depth 5351– 5348 m; 31 Aug. 2012; A. Brandt leg.; epibenthic sledge, RV Sonne, cruise no. 223, stn. 11-12; MIMB 43815. Other material RUSSIA – oceanic slope of the Kamchatka Peninsula • 2 specs; 53°05.4′ N, 161°55.2′ E –53°07′ N, 161°56.1′ E; depth 4890–4984 m; 10 Aug. 1990; L.I. Moskalev and S.V. Galkin leg.; Sigsbee trawl; RV Akademik Mstislav Keldysh, cruise no. 22, stn. 2323; IORAS OBF collection Cat. BIV00044. PACIFIC OCEAN – abyssal plain adjacent to ...