Category: Nodosariana

Belongs within: Polymorphinida. The Pleurostomellidae are a group of Foraminifera known from the Lower Cretaceous (possibly Jurassic) to the present, characterised by the presence of an internal siphon running between the apertures of successive chambers. In Pleurostomellinae the test is uniserial throughout or initially biserial and later uniserial (Loeblich & Tappan 1964). Characters (Loeblich &… Continue reading Pleurostomellidae

Belongs within: Nodosariana.Contains: Pleurostomellidae, Polymorphinidae, Glandulinidae. The Polymorphinida are an assemblage of multilocular, typically high-spired foraminiferans that usually bear elongate chambers that strongly overlap towards the base of the test. <==PolymorphinidaM13    |–PleurostomellinaM13    |    |–PleurostomellidaeM13    |    `–EllipsoidinidaeM13    |         |–Lateroihiatus Hayward in Hayward et al. 2012M13    |         `–Ellipsoidina Seguenza 1859LT64b    |              `–*E. ellipsoides Seguenza 1859LT64b    `–PolymorphininaM13         |–PolymorphinidaeM13         |–GlandulinidaeM13         |–PartisaniidaeM13         |    |–Xintania Lin 1984HW93         |    `–Partisania Sosnina 1978K04         |         `–*P. typica Sosnina… Continue reading Polymorphinida

Belongs within: Foraminifera.Contains: Palaeotextulariidae, Nodosariida, Polymorphinida, Ellipsolagenidae, Lagena, Globivalvulinidae, Lenticulina, Marginulina, Lingulinidae. The Nodosariana are a group of foraminiferans with a low-magnesium, calcitic secreted test that is monolamellar and radial (Groves et al. 2004). They first appeared in the middle late Carboniferous, though they did not become prominent until the Middle Permian (Groves et al. 2003). The aperture… Continue reading Nodosariana

Belongs within: Nodosariana. Lenticulina is a Triassic to Recent genus of lenticular foraminiferans (Loeblich & Tappan 1964). Characters (Loeblich & Tappan 1964): Test free, planispiral or rarely slightly trochoid, lenticular, biumbonate, periphery angled or keeled; chambers increasing gradually in size, in general of greater breadth than height; sutures radial, straight or curved and depressed, flush or elevated; surface… Continue reading Lenticulina

Belongs within: Nodosariina. The Nodosariidae are a Permian to Recent group of foraminiferans in which the test has one or more chambers arranged in straight, arcuate or enrolled series. The aperture is terminal and rounded or radiate. In the type genus Nodosaria, the test is multilocular, rectilinear and rounded in cross-section with distinct sutures that… Continue reading Nodosariidae

Belongs within: Nodosariina. Dentalina is a Permian to Recent genus of foraminiferans with an elongate, arcuate test (Loeblich & Tappan 1964). Characters (Loeblich & Tappan 1964): Test elongate, arcuate, uniserial; sutures commonly oblique; aperture radiate, terminal, may be eccentric or nearly central. Dentalina Risso 1826 [incl. Dentalinella Wedekind 1937, Enantiodentalina Marie 1941, Svenia Brotzen 1937; Dentalinidae]LT64    |–*D. cuvieri (d’Orbigny… Continue reading Dentalina

Belongs within: Nodosariana. Marginulina is a Triassic to Recent genus of foraminiferans with an initially curved test (Loeblich & Tappan 1964). Characters (Loeblich & Tappan 1964): Early portion slightly coiled, not completely enrolled, later rectilinear; sutures oblique, especially in early portion; aperture of dorsal angle, somewhat produced. <==Marginulina d’Orbigny 1826 (see below for synonymy)LT64    |–*M. raphanus d’Orbigny 1826 [=*Ellipsomarginulina… Continue reading Marginulina

Belongs within: Nodosariana. Lagena is a Jurassic to Recent genus of mostly unilocular foraminiferans (Loeblich & Tappan 1964). Characters (Loeblich & Tappan 1964): Test unilocular, rarely two or more chambers; surface variously ornamented; aperture on elongate neck which may have phialine lip, not radiate. <==Lagena Walker & Jacob in Kanmacher 1798G-B87 (see below for synonymy)    |–*L. sulcata (Walker &… Continue reading Lagena

Belongs within: Polymorphinida.Contains: Guttulina. The Polymorphinidae are a group of multichambered forams known from the Triassic to the present. The test is free in members of the subfamily Polymorphininae but attached in Webbinellinae (Loeblich & Tappan 1964b). Characters (Loeblich & Tappan 1964b): Test multilocular, chambers in spiral or sigmoidal coil about longitudinal axis of growth,… Continue reading Polymorphinidae

Belongs within: Nodosariina. Frondicularia is a Permian to Recent genus of foraminiferans with a flattened test (Loeblich & Tappan 1964). Characters (Loeblich & Tappan 1964): Test free, elongate or palmate, flattened; chambers low, broad and equitant; sutures strongly arched or angled at centre of test; aperture terminal, radiate, may be produced on short neck. Frondicularia Defrance 1826W76 (see… Continue reading Frondicularia