BUZASINA Loeblich and Tappan, 1985

 

 

Type species: Trochammina ringens Brady, 1879 (*337), p. 57; OD.

Buzasina Loeblich and Tappan, 1985 (*1923), p. 92. Cystamminella Lukina, 1980 (*1943), p. 33 (non Cystamminella Myadyuk, 1966); type species: Trochammina galeata Brady, 1881 (*337), p. 52: OD.

Test free, small, planispirally enrolled, three to four strongly overlapping and rapidly enlarg­ing chambers in two to three whorls, final chamber comprising more than one-half the test; wall thin, finely agglutinated with con­siderable cement; aperture areal, equatorial, and slitlike, completely bordered by a narrow lip. U. Cretaceous (Santonian-Campanian) of NW Pacific; Holocene; N. and S. Pacific; N.and S. Atlantic; Gulf of Mexico; Antarctic from 1,500 m to 5,965 m.

 

Remarks: Buzasina differs from Trochammina and Cystammina in being planispiral, from Haplophragmoides in the areal aperture, and from Labrospira in the very fine-grained wall, few chambers per whorl that increase rapidly in size as added, and in the deep water habitat.