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Apsopelix miyazakii, a New Species of Crossognathid Fish (Teleostei) from the Upper Cretaceous of Hokkaido, Japan

Abstract. Apsopelix miyazakii sp. nov. is described on the basis of a single specimen from the Upper Cretaceous (Turonian), Nakagawa Town, Hokkaido, Japan. This new species differs from the other species of the genus Apsopelix by the existence of a median frontal convexity near the posterior end of the frontal bones, the articulation of the lower jaw behind the middle of the orbit and the antorbital contacting with the first infraorbital at the ventral half of its posterior margin. This is the first record of the genus Apsopelix and the family Crossognathidae from the eastern part of the Tethys.