Poromya castanea Habe, 1952

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 : 243

Poromya castanea Habe, 1952

( Fig. 3 O, P )

Poromya castanea Habe, 1952: 156 .

Material examined: four specimens from the ocean slope of Iturup Island (274–290 m) .

Distribution: Yellow Sea; Sea of Japan; southern Kuril Islands (100– 1,080 m) ( Scarlato 1981; Kantor & Sysoev 2005; Lutaenko & Noseworthy 2012; Kamenev 2013; Okutani & Saito 2014, 2017).

Remarks: This is a new record from the region of the Kuril Islands.

Poromya castanea has a superficial resemblance to Dermatomya mactroides ( Dall, 1889) ( Coan, Valentich-Scott & Bernard 2000; Coan & Valentich-Scott 2012). However, species belonging to Poromya possess radial rows of fine pustules on their shell surface which are lacking in Dermatomya ( Scarlato 1981; Coan, Valentich-Scott & Bernard 2000) (cf. Fig. 3M and O ).

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).