Thyasira kharkovensis Kamenev 2023, sp. nov.

• Main Author: Kamenev, Gennady M.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2023
• Subjects: Biodiversity; Taxonomy; Animalia; Mollusca; Bivalvia; Lucinida; Thyasiridae; Thyasira; Thyasira kharkovensis; Bering Sea
• Online Access: https://doi.org/10.5281/zenodo.7573255

Thyasira kharkovensis sp. nov. urn:lsid:zoobank.org:act: 5E4F1FDC-5A7D-47BA-9FE5-B1F700D80C60 Figs 6, 12–16, Table 4 Parathyasira sp. 1 – Kamenev 2018a: 234. Diagnosis Shell small (to 7.4 mm in length), obliquely pyriform, transparent, flattened, drawn out anteriorly. Sculpture of thin, commarginal riblets and weak undulations. Posterior folds weak. Posterior sulcus weak, as a flattened, narrow area. Escutcheon long, shallow. Auricle low. Lunule short, flat, weakly defined. Ligament partially visible externally, long. Prodissoconch large (to 200 µm), with 7 thin, lamellated folds, radiating from short, plicate ridge. Lateral body pouches large, extensively lobed. Foot long, distally bulbous; bulbous portion not divided into two parts; heel distinct. Etymology The species epithet honors the city of Kharkov, where I was born, grew up, and was educated. Material examined Holotype RUSSIA • Sea of Okhotsk, Kuril Basin floor; 48°02.512′ N, 149°59.911′ E –48°02.353′ N, 149°59.805′ E; depth 3350 m; 21 Jul. 2015; K.V. Minin leg.; Agassiz trawl, RV Akademik M.A. Lavrentyev, cruise no. 250, stn. 6-9; MIMB 43824. Paratypes RUSSIA • 2 specs; same collection data as for holotype; MIMB 43825 • 2 specs; same collection data as for holotype; SMF 367802. Other material RUSSIA – Bering Sea • 6 specs; 55°13.2′ N, 167°29.07′ E –55°12′ N, 167°26.7′E; depth 3957 m; 31 Jul. 1990; L.I. Moskalev and S.V. Galkin leg.; Sigsbee trawl, RV Akademik Mstislav Keldysh, cruise no. 22, stn. 2309; IORAS OBF collection Cat. BIV00045 • 6 specs; same locality as for preceding; 55°36.1′ N, 167°23.04′ E –55°35′ N, 167°24.5′E; depth 4294 m; 5 Aug. 1990; L.I. Moskalev and S.V. Galkin leg.; Sigsbee trawl, RV Akademik Mstislav Keldysh, cruise no. 22, stn. 2316; IORAS OBF collection Cat. BIV00046 – Sea of Okhotsk • 1 spec.; 46°08.745′ N, 145°59.760′ E; depth 3304 m; 9 Jul. 2015; G.M. Kamenev leg.; box corer, RV Akademik Mstislav Keldysh, cruise no. 71, stn. 1-3; MIMB 43826 • 2 specs; same locality as for preceding; 46°08.875′ N, 145°59.336′ E –46°08.839′ N, ...