Article: Calcareous adherent Foraminifera from the British Jurassic and Cretaceous and the French Eocene
C. G. Adams
Previous records of calcareous adherent Foraminifera from the British Jurassic are reviewed and the presence of four genera, Buttopora Quenstedt, Carixia Macfadyen, Nubecularia Defrance, and Nubeculinella Cushman, is established. Emended diagnoses for three of these genera are given and the type species of one, Nubecularia lucifuga Defrance, is redescribed from topotype (Eocene) material. All the species and varieties of the Jurassic genera, including certain free-living forms, are redescribed, and their morphological variation, diagnostic characters, and stratigraphical ranges are given. Three Cretaceous taxa, Bullopora laevis (Sollas), B. sollasi (Chapman), and B. tuberculata (Sollas), are also discussed. Lectotypes are designated for Nubecularia triloculina Ten Dam, Nubeculinella tibia (Jones and Parker), and Bullopora laevis (Sollas).