Abstract
Middle Permian Inoceramus-like bivalves of the genera Kolymia Licharew and Cyrtokolymia Astafieva endemic to the East Boreal Biogeographic Realm are considered. Cyrtokolymia, previously regarded by the author as endemics of the Verkhoyansk–Okhotsk Province and including only the type species, are also recorded in the Kolyma–Omolon Province, where they are represented by the endemic species C. bobini sp. nov. An emended diagnosis of the genus Cyrtokolymia is provided. The genus Kolymia comprises about 30 species. The greatest diversity of Kolymia (24 species, 13 of which are endemic) is known from the Verkhoyansk–Okhotsk Province, which is the center of diversification of this genus. The Kolyma–Omolon Province is characterized by 12 species, only three of which are endemic. In other provinces of the East Boreal Realm, only individual members of Kolymia are known. From the Middle Permian of the Omolon Massif, northern Verkhoyansk Region, and Penzhinsky Ridge, the following new species are described: Kolymia posneri Muromzeva, Kusnezov et Biakov, sp. nov., K. pontoneica Biakov, sp. nov., K. simkiniformis Biakov, sp. nov., and Cyrtokolymia bobini Biakov, sp. nov.
Similar content being viewed by others
References
Astafieva, M.M., Bivalve mollusks of the genus Kolymia, Paleontol. Zh., 1988, no. 2, pp. 21–30.
Astafieva, M.M., Permskie inotseramopodobnye dvustvorchatye mollyuski Rossii (Permian Inoceramus-like Bivalve Mollusks of Russia), Moscow: Nauka, 1993.
Biakov, A.S., New ideas on the system of the Permian Inoceramus-like bivalves of the Eastern Boreal Zone, Paleontol. J., 2008, vol. 42, no. 3, pp. 232–242.
Biakov, A.S., Zonal’naya stratigrafiya, sobytiinaya korrelyatsiya, paleobiogeografiya permi Severo-Vostoka Azii (po dvustvorchatym mollyuskam) (Zonal Stratigraphy, Event Correlation, and Paleobiogeography of the Permian of northeastern Asia Based on Bivalve Mollusks), Magadan: Sev.-Vost. Kompl. Nauchno-Issled. Inst. Dal.-Vost. Otd. Ross. Akad. Nauk, 2010.
Biakov, A.S., Permian biospheric events in northeastern Asia, Stratigr. Geol. Correl., 2012a, vol. 20, no. 2, pp. 199–210.
Biakov, A.S. New Inoceramus-like bivalves of the genus Kolymia Licharew from the Middle Permian of northeast Asia, Paleontol. J., 2012b, vol. 46, no. 6, pp. 552–559.
Biakov, A.S. and Kutygin, R.V., Middle Permian bivalves from the Delenzhian–Dulgalakhian boundary beds of the Middle Permian of the lower reaches of the Lena River (northern Verkhoyansk Region, northern Siberia), Paleontol. J., 2018, vol. 52, no. 7.
Ganelin, V.G., Biakov, A.S., Vedernikov, I.L., et al., Autigenic carbonates of the Late Paleozoic basins of northeastern Asia, Materialy Vserossiiskogo litologicheskogo soveshchaniya “Rify i karbonatnye psefitolity” (All-Russia Lithological Conference on the Reeves and Carbonate Psephitolites), Syktyvkar: Geoprint, 2010, pp. 47–49.
Hoare, J.M. and Coonrad, W.L., Atomodesma in southwestern Alaska, in The United States Geological Survey in Alaska: Accomplishments during 1975, Cobb, E.H., Ed., Anchorage: Geol. Surv., 1976, circular 733, p. 44.
Kaufmann, E.G. and Runnegar, B., Atomodesma (Bivalvia) and Permian species of the United States, J. Paleontol., 1975, vol. 49, no. 1, pp. 23–51.
Muromtseva, V.A. and Guskov, V.A., Permskie morskie otlozheniya i dvustvorchatye mollyuski Sovetskoi Arktiki (Permian Marine Beds and Bivalve Mollusks of the Soviet Arctic), Leningrad: Nedra, 1984.
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © A.S. Biakov, 2018, published in Paleontologicheskii Zhurnal, 2018, No. 1, pp. 3–9.
Rights and permissions
About this article
Cite this article
Biakov, A.S. New Species of Inoceramus-like Bivalves of the Subfamily Kolymiinae from the Middle Permian of Northeastern Asia. Paleontol. J. 52, 1–8 (2018). https://doi.org/10.1134/S0031030118010069
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0031030118010069