Parvamussium intuscostatum ( Yokoyama, 1920 ), 2024

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 : 241

Parvamussium intuscostatum ( Yokoyama, 1920)

( Fig. 3 G, H )

Pecten intuscostatus Yokoyama, 1920: 156–157 , pl. 13, figs 9, 10.

Parvamussium intuscostatum ( Yokoyama, 1920) — Hayami 2017: 1198, pl. 499, fig. 3.

Material examined: 16 specimens from the sea slope of Iturup , Urup, and Onekotan Islands (123–350 m) .

Distribution: Northern Honshu to Ryukyu Islands ( Japan); Sea of Japan; Sea of Okhotsk; Kuril Islands (50– 591 m) ( Scarlato 1960, 1981; Hayami 2000, 2017; Kantor & Sysoev 2005).

Remarks: This is a new record from the region of the Kuril Islands. Scarlato (1960) described Polynemamussium uschakovi Scarlato, 1960 , that subsequently was synonymized with Parvamussium intuscostatum ( Yokoyama, 1920) (WoRMS Editorial Board 2024) .

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).