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Foraminifera taxon detailsOrbitolinella Henson, 1948 †
 739363 (urn:lsid:marinespecies.org:taxname:739363)
accepted
Genus
Orbitolinella depressa Henson, 1948 † (type by original designation)
marine,
fossil only
feminine
Henson, F. R. S. (1948). Larger imperforate foraminifera of south-western Asia. Families Lituolidae, Orbitolinidae and Meandropsinidae. <em>British Museum (Natural History).</em> 1-127.
page(s): p. 90 [details] Available for editors  [request]
Diagnosis Test free, conical, low, embryonic chambers unknown, discoidal chambers enlarging in diameter as added, interior subdivided...
Diagnosis Test free, conical, low, embryonic chambers unknown, discoidal chambers enlarging in diameter as added, interior subdivided by numerous exoskeletal vertical radial beams projecting inward from the lateral wall, those of successive chambers alternating in position, with shorter and thinner secondary beams intercalated between the main ones in the narrow marginal zone, some adjacent major beams fuse inward, with others irregularly anastomosing to form a reticulum in the central zone; wall of imperforate microgranular calcite, with vitreous layer over the apertural face; aperture consists of multiple pores over the central zone but absent from the outermost marginal zone, remaining as intercameral pores in later chambers. U. Cretaceous (U. Cenomanian or Turonian); Arabia: Qatar Peninsula. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
Hayward, B.W.; Le Coze, F.; Vachard, D.; Gross, O. (2024). World Foraminifera Database. Orbitolinella Henson, 1948 †. Accessed at: https://www.marinespecies.org/Foraminifera/aphia.php?p=taxdetails&id=739363 on 2024-10-13
Date action by
original description
Henson, F. R. S. (1948). Larger imperforate foraminifera of south-western Asia. Families Lituolidae, Orbitolinidae and Meandropsinidae. <em>British Museum (Natural History).</em> 1-127.
page(s): p. 90 [details] Available for editors [request] From editor or global species database
Diagnosis Test free, conical, low, embryonic chambers unknown, discoidal chambers enlarging in diameter as added, interior subdivided by numerous exoskeletal vertical radial beams projecting inward from the lateral wall, those of successive chambers alternating in position, with shorter and thinner secondary beams intercalated between the main ones in the narrow marginal zone, some adjacent major beams fuse inward, with others irregularly anastomosing to form a reticulum in the central zone; wall of imperforate microgranular calcite, with vitreous layer over the apertural face; aperture consists of multiple pores over the central zone but absent from the outermost marginal zone, remaining as intercameral pores in later chambers. U. Cretaceous (U. Cenomanian or Turonian); Arabia: Qatar Peninsula. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
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