Parvithracia sirenkoi Kamenev, 2002

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 : 244

Parvithracia sirenkoi Kamenev, 2002

( Fig. 3 Q, R )

Parvithracia (Pseudoasthenothaerus) sirenkoi Kamenev, 2002: 123–126 , figs 36–54.

Material examined: three specimens from the ocean and sea slopes of Simushir , Onekotan, and Paramushir Islands (400– 1,045 m) .

Distribution: Honshu Island ( Japan), Pacific Ocean; Kuril Islands (101– 1,515 m) ( Kamenev 2002; Kantor & Sysoev 2005; Okutani, Saito & Haga 2009).

Remarks: Previously, this species was found only in the waters of the southern Kuril Islands (Iturup, Kunashir, and Yuri Islands) and off the ocean coast of Japan at depths of 101– 1,515 m ( Kamenev 2002; Okutani, Saito & Haga 2009). Our study has extended its northern range to Paramushir Island.

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).