Nucinella svalbardensis Hryniewicz & Little & Nakrem 2014, sp. nov.

• Main Authors: Hryniewicz, Krzysztof, Little, Crispin T. S., Nakrem, Hans Arne
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2014
• Subjects: Biodiversity; Taxonomy; Animalia; Mollusca; Bivalvia; Solemyoida; Manzanellidae; Nucinella; Nucinella svalbardensis; Knorringfjellet; Svalbard; Spitsbergen
• Online Access: https://doi.org/10.5281/zenodo.4929756; http://treatment.plazi.org/id/A2311D4D9F12E32904E6FBC5FE5A2E56

Nucinella svalbardensis sp. nov. (Figure 5 A–N) 2011 Nucinella sp. —Hammer et al ., fig. 7f–g, tab. 2. Etymology. After the archipelago of Svalbard. Type locality. Seep 9, Knorringfjellet, Spitsbergen, 78°18’49.9’’N 16°10’58.9’’E. Type material. Holotype: PMO 217.171; a well preserved articulated internal mould showing external shape and anterior muscle scar arrangement. Paratypes: PMO 217.217; an articulated internal mould and silicone rubber casts showing lateral teeth morphology. PMO 224.978; an articulated internal mould with shell partially preserved, showing external ornament of commarginal growth lines. PMO 224.981; an articulated internal mould and silicone rubber cast showing shape of cardinal teeth, as well as lateral teeth length. PMO 225.020; an articulated internal mould and silicone rubber casts showing lateral teeth length. PMO 225.042; an articulated internal mould with shell partially preserved showing the shape of the posteriormost cardinal teeth. Material examined. 98 specimens; mostly articulated or semiarticulated shells or moulds. See Appendix 1 for list of specimens. Dimensions. 3.5–23 mm in length, 1.2–9.1 mm in height, 1–8.2 mm in width. See Figure 6A–C and Appendix 2B for details. Diagnosis. A very large species of Nucinella with rounded posteroventral margin, and sabre-shaped lateral teeth, two in the right valve, one in the left. Description. Shell very large, moderately inflated, equivalve, inequilateral, covered with commarginal growth lines. Umbo opisthogyrate, weakly projecting above dorsal margin, situated around ¼ of shell length. Anterodorsal margin weakly and evenly convex, passing smoothly into broadly arched anterior margin. Curvature of anterior margin even and symmetrical, with extremity around half distance from dorsal to ventral sides. Ventral margin weakly convex, roughly parallel to dorsal margin. Posterior extremity asymmetrically rounded, with ventral part of arch smoother than dorsal. Posterodorsal margin weakly concave, hosting deep ligament pit. ...