Papyridea harrimani Dall, 1904 (Bivalvia, Cardiidae) as a marker for upper Eocene and lower Oligocene strata of the North Pacific

概要

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Statistical analysis indicates that Papyridea (Fulvia) nipponica Yokoyama, 1924, Papyridea matschigarica Khomenko, 1938, and Papyridea matschigarica uspenica Barinov in Gladenkov et al., 1987, are synonyms of Papyridea harrimani Dall, 1904, which was originally described from the lower Oligocene Stepovak Formation in Popof Island, Shumagin Islands, southwestern Alaska. Papyridea harrimani occurs only in late Eocene and early Oligocene faunas and is useful for correlating strata from northern Honshu to Alaska : Stepovak Formation, southwestern Alaska; Mallenskaya and lonayskaya Suites, Koryak Upland; Aluginskaya Suite and lower part of the Pakhachinskaya Suite, eastern Kamchatka; Amaninskaya, Utkholokskaya and Viventekskaya Suites of western Kamchatka; Machigarskaya, Arakayskaya, Gastellovskaya and Akhsnayskaya Suites, Sakhalin; Nuibetsu, Charo and lower Sankebetsu Formations, Hokkaido; Asagai Formation, Honshu. In views of the stratigraphic ranges of Papyridea harrimani and other molluscs, strata 3 and 4 of the Pakhachinskaya Suite in eastern Kamchatka may be assgined an age of early Oligocene.
日本古生物学会の論文
1999-09-30