GLOBIVALVULINIDAE Reitlinger, 1950

Family GLOBIVALVULINIDAE Reitlinger, 1950 View in CoL

Test biserial, entirely planispiral or initially trochospiral, or entirely uncoiled, or trochospiral, becoming planispiral. Wall thin, dark, microgranular, eventually granular with inclusions of clearer carbonate particles, or differentiated into two, three or four layers; nevertheless, this differentiation does not affect all the chambers and/or corresponds to fossil diagenetic features, and is not admitted here as a generic criterion. Endoskeletal folds or partitions lead to the formation of chamberlets. Oral tongue often present, occasionally passing to a siphon. Aperture terminal simple. Mississippian (latest Tournaisian)–Permian (latest Changhsingian).?Earliest Triassic.

Subfamily DAGMARITINAE Bozorgnia, 1973 Uncoiled biserial Globivalvulinidae (or exceptionally biserially coiled: Crescentia ). Undivided chambers (or divided on chamberlets: Louisettita ), often with thornlike lateral projections. Aperture terminal, basal simple with a valvula.

Composition: Dagmarita Reitlinger, 1965 ; Bidagmarita Gaillot & Vachard in Gaillot et al., 2009; Crescentia Ciarapica, Cirilli, Martini & Zaninetti, 1986 ; Danielita Altıner & Özkan- Altıner, 2010; Labiodagmarita Gaillot & Vachard, 2007 ; Louisettita Altıner & Brönnimann, 1980 ; Sengoerina Altıner, 1999.