Diagnosis
provided by World Register of Marine Species
Test large, 2 mm to 4 mm in length, uniserial and rectilinear, with closely appressed chambers; wall coarsely agglutinated, outer layer of tightly packed grains, inner layer less firmly cemented and friable, with carbonate cement; aperture terminal, an elongate oval slit, nearly flush with the surface and lacking a distinct neck. Holocene; NW Pacific, region of Kamchatka Peninsula and the Kurile Islands, from 283 m to 2,133 m. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification)
Loeblich, A. R.; Tappan, H. (1987). Foraminiferal Genera and their Classification. Van Nostrand Reinhold Company, New York. 970pp.
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