Foraminifera taxon details

Orbitammina Berthelin, 1893 †

738433  (urn:lsid:marinespecies.org:taxname:738433)

accepted
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marine, brackish, fresh, terrestrial
fossil only
feminine
Berthelin, G. (1893). Sur l'Orbicula elliptica d'Archiac, du Bathonien supérieur de l'Aisne et des Ardennes. <em>Comptes rendus sommaires des séances de la Société géologique de France.</em> 3(21): LXXIII., available online at https://www.biodiversitylibrary.org/page/30961306
page(s): p. LXXIII [details]   
Hayward, B.W.; Le Coze, F.; Vachard, D.; Gross, O. (2024). World Foraminifera Database. Orbitammina Berthelin, 1893 †. Accessed at: https://www.marinespecies.org/foraminifera/aphia.php?p=taxdetails&id=738433 on 2024-04-24
Date
action
by
2013-08-29 09:12:59Z
created
2017-11-13 15:40:46Z
changed

original description Berthelin, G. (1893). Sur l'Orbicula elliptica d'Archiac, du Bathonien supérieur de l'Aisne et des Ardennes. <em>Comptes rendus sommaires des séances de la Société géologique de France.</em> 3(21): LXXIII., available online at https://www.biodiversitylibrary.org/page/30961306
page(s): p. LXXIII [details]   
From editor or global species database
Diagnosis Test large, up to 22 mm in diameter, compressed, but undulating rather than flat, commonly reniform or rarely with lateral margins recurved and overlapping to appear discoidal, early stage probably planispiral but never observed, earliest known chambers are much recurved, very narrow, and elongate but not completely cyclic, rapidly increasing in breadth to produce a reniform test, peripheral margins never thickened and ringlike as in Orbitopsella; wall agglutinated, internal structure as in Orbitopsella, surface of test appears cross-hatched as a result of the secondary partitions subdividing the chamber; aperture multiple, openings in successive chambers radially aligned, with new openings intercalated as the chambers increase in breadth. U. Jurassic (Bathonian); France; Oman, SW Asia. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]