WoRMS taxon details
NomenclatureTaxonomyredescription
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."
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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]
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