Foraminifera taxon details
original description
Martin, K., 1890, Untersuchungen über den Bau von Orbitolina (Patellina auct.) von Borneo, Sammlungen des Geologischen Reichs- Museums Leiden, ser. 1, 4:209-231. , available online at https://www.repository.naturalis.nl/document/552418 [details] Available for editors [request]
redescription
Schlagintweit, F. (2022). Annular chambers in Cretaceous Orbitolinidae (larger benthic foraminifera): an overview. <em>Acta Palaeontologica Romaniae.</em> (19 (1)): 45-52., available online at https://doi.org/10.35463/j.apr.2023.01.05 note: p. 45: "An emendation of the diagnosis of the family Orbitolinidae is here proposed to include tests that may consist completely or almost exclusively of post-embryonic annular chambers. As a result, ... p. 45: "An emendation of the diagnosis of the family Orbitolinidae is here proposed to include tests that may consist completely or almost exclusively of post-embryonic annular chambers. As a result, the genus Coskinolinella Delmas & Deloffre, up to now treated as a genus of uncertain status or deleted in foraminiferal classifications, is now included in the family Orbitolinidae."
[details] Available for editors [request]
From editor or global species database
Diagnosis Test conical; early stage trochospiral to pseudoplanispiral, then rectilinear with broad, low chambers subdivided by marginal subepidermal partitions, central zone containing pillars or vertical partitions; simple megalospheric embryonal apparatus of protoconch and deuteroconch or may be more complex, with one or two additional zones; may have trilaminar wall, with endoskeleton of transparent calcite partly covered by secondary granular calcite with organic material and may incorporate agglutinated particles; aperture consists of numerous pores in the central zone of the septa. M. Jurassic to Oligocene. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
| |