Limatula attenuata Dall, 1916

Lisitsyna, Kseniya N. & Kamenev, Gennady M., 2024, New and rare bivalve species for the fauna of the Kuril Islands (northwestern Pacific Ocean): A study of materials collected over 70 years of expeditions (from 1949 to 2019), Zootaxa 5523 (2), pp. 231-253 : 240

Limatula attenuata Dall, 1916

( Fig. 3 A, B )

Limatula attenuata Dall, 1916: 17 .

Material examined: 27 specimens from the ocean and sea slopes of Polonsky , Shikotan , Kunashir , Iturup , Brat Chirpoyev, and Simushir Islands (30–500 m) .

Distribution: Kuril Islands; Kamchatka Peninsula; Aleutian Islands; Bering Sea; Pribilof Island and Bristol Bay, south to Cape Flattery, Washington (15–500 m) ( Coan, Valentich-Scott & Bernard 2000).

Remarks: This is a new record from the region of the Kuril Islands. The species is widely distributed in the North Pacific (depth 15–274 m) ( Coan, Valentich-Scott & Bernard 2000). In the Northwest Pacific, it was previously found only off the Kamchatka Peninsula ( Coan, Valentich-Scott & Bernard 2000). The present finding down to the southernmost islands from depths to 500 m thus substantially expands its known geographical and depth range.

Figures

FIGURE 3. New and rare bivalve species for the fauna of the Kuril Islands. (A, B) Limatula attenuata (Iturup Island, 330 m, shell length 6.6 mm). (C, D) Limatula subauriculata (Iturup Island, 50 m, shell length 4.6 mm). (E, F) Musculus impressus (Urup Island, 123 m, shell length 17.7 mm). (G, H) Parvamussium intuscostatum (Onekotan Island, 146–147 m, shell length 17.2 mm). (I, J) Cardiomya cf. tosaensis (Urup Island, 100 m, shell length 7.8 mm). (K, L) Cetoconcha hyalina (Onekotan Island, 150–198 m, shell length 44.0 mm). (M, N) Dermatomya tenuiconcha (Simushir Island, 100 m, shell length 12.0 mm). (O, P) Poromya castanea (Iturup Island, 290 m, shell length 20.5 mm). (Q, R) Parvithracia sirenkoi (Paramushir Island, 400 m, shell length 7.0 mm). (S, T) Panomya ampla (Onekotan Island, 57 m, shell length 61.6 mm).