Belongs within: Rotaliida.Contains: Anomalinidae, Trichohyalidae, Gavelinella, Parrelloididae, Discorbinellidae, Cancrisidae, Eponididae, Rosalinidae. The Siphoninidae are a group of Foraminifera known from the Eocene to the present, commonly bearing a frilled keel around the outer edge of the test (Loeblich & Tappan 1964). <==RosalinidaM13 |–GavelinelloideaM13 | |–AnomalinidaeM13 | |–TrichohyalidaeM13 | |–GavelinellidaeM13 | | |–GavelinellaM13 | | |–Brotzenella… Continue reading Rosalinida


Belongs within: Rotaliida. The Uvigerinidae are a group of foraminiferans known from the Upper Cretaceous to the present (Loeblich & Tappan 1964b). Characters (from Loeblich & Tappan 1964b): Test triserial to biserial in early stage, later may become biserial or uniserial; aperture terminal with neck and internal tooth plate connecting apertures of successive chambers. <==Uvigerinidae… Continue reading Uvigerinidae


Belongs within: Rotaliida. The Buliminidae are a group of Foraminifera known from the Palaeocene to the present. Members of the type genus Bulimina have a tooth plate with a developed border, and with one shank free and the other fixed to the internal chamber wall below the aperture (Loeblich & Tappan 1964b). Characters (from Loeblich & Tappan… Continue reading Buliminidae


Belongs within: Bolivinitida. The Bolivinitidae are a group of primarily biserial Foraminifera known from the Upper Triassic to the present. Members of the type genus Bolivinita have a compressed test that is rectangular in cross-section, with a comma-shaped basal aperture bearing a bordering lip (Loeblich & Tappan 1964). The bolivinitids Published 30 October 2021 The… Continue reading Bolivinitidae


Belongs within: Rosalinida. Lifestyles of the Rosalinidae Published 13 February 2022 Among the modern foraminiferans, one of the most prominent radiations is among members of the Rotaliida, characterised by globose chambers and calcareous, hyaline test walls. Among the numerous families making up the Rotaliida are members of the Rosalinidae. Rosalinids may be regarded as fairly… Continue reading Rosalinidae


Belongs within: Globothalamea. Holding forams together Published 28 February 2018 In past posts relating to the Foraminifera, I’ve made reference to the changes in classification undergone by this group over the years. Forams are unusual among unicellular organisms in producing a hard, often complex test that means they have both left an extensive fossil record… Continue reading Nouriida


Belongs within: Globigerinana. The Planomalinidae are a group of planispiral, planktonic forams known from the Lower Cretaceous to the Palaeocene (Loeblich & Tappan 1964). Planomalinoidea [Planomalinacea]M13 |–PlanomalinidaeLT64a | |–Planomalina Loeblich & Tappan 1946LT64b | | `–P. buxtorfi (Gandolfi 1942) (see below for synonymy)LT64b | `–Biglobigerinella Lalicker 1948LT64b | `–*B. multispina Lalicker 1948LT64b |–SchackoinidaeM13 | |–Leupoldina… Continue reading Planomalinoidea


Belongs within: Globigerinidae. Globigerina is a genus of planktonic forams known from the Palaeocene to the present (Loeblich & Tappan 1964b). Characters (from Loeblich & Tappan 1964b): Test free, trochospiral, chambers spherical to ovate; wall calcareous, perforate, radial in structure, surface may be smooth, pitted, cancellated, hispid or spinose; aperture interiomarginal, umbilical, with tendency in… Continue reading Globigerina


Belongs within: Rotaliida. Forams with teeth Published 27 August 2016 Time for another foram post. The above image (copyright Robert P. Speijer, scale bar = 100 µm) shows Turrilina brevispira, a typical Eocene representative of the foram subfamily Turrilininae. The Turrilininae are a group of calcareous forams that first appeared in Middle Jurassic (Loeblich &… Continue reading Turrilinidae


Belongs within: Globothalamea. The Saccamminidae are a group of Foraminifera with agglutinated tests known from the Ordovician to the present (Loeblich & Tappan 1964); it is likely that this represents a polyphyletic assemblage of relatively simple-bodied forams. A small bag of grains Published 9 March 2010 Foraminifera are one of the best-known of protist groups… Continue reading Saccamminidae