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Foraminifera taxon details

Duostomina Kristan-Tollmann, 1960 †

721309  (urn:lsid:marinespecies.org:taxname:721309)

accepted
Genus
Duostomina biconvexa Kristan-Tollmann, 1960 † (type by original designation)

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marine, brackish, fresh, terrestrial
fossil only
feminine
Kristan-Tollmann, E. (1960). Rotaliidea (Foraminifera) aus der Trias der Ostalpen, in: Beiträge zur Mikropaläontologie der alpinen Trias. <em>Jahrbuch Geologische Bundesanstalt, Sb.</em> 5: 47-78., available online at http://www.zobodat.at/pdf/JahrbGBA-SB_05_0047-0078.pdf
page(s): p. 68 [details]  Available for editors  PDF available [request] 
Hayward, B.W.; Le Coze, F.; Vachard, D.; Gross, O. (2024). World Foraminifera Database. Duostomina Kristan-Tollmann, 1960 †. Accessed at: https://www.marinespecies.org/foraminifera/aphia.php?p=taxdetails&id=721309 on 2024-08-13
Date
action
by
2013-03-08 13:53:47Z
created
2017-12-22 15:35:34Z
changed

original description Kristan-Tollmann, E. (1960). Rotaliidea (Foraminifera) aus der Trias der Ostalpen, in: Beiträge zur Mikropaläontologie der alpinen Trias. <em>Jahrbuch Geologische Bundesanstalt, Sb.</em> 5: 47-78., available online at http://www.zobodat.at/pdf/JahrbGBA-SB_05_0047-0078.pdf
page(s): p. 68 [details]  Available for editors  PDF available [request] 

basis of record Loeblich, A. R.; Tappan, H. (1987). Foraminiferal Genera and their Classification. Van Nostrand Reinhold Company, New York. 970pp., available online at https://books.google.pt/books?id=n_BqCQAAQBAJ [details]  Available for editors  PDF available [request] 
From editor or global species database
Diagnosis Test lenticular, biconvex, trochospirally coiled, all chambers visible on the spiral side, only the nine of the last whorl visible on the umbonate opposite side, periphery subacute, a median internal plate obliquely divides the chamber into halves, and an oblique bridge extends across the chamber from front to back near the ventral side from the inner margin of the median plate, the two partitions cutting off an umbilical cavity, a dorsal cavity, and a ventral one, the chamber subdivisions communicating through small openings above the partition near the dorsal wall; wall calcareous, aperture interiomarginal, double, primary opening situated midway between the umbilicus and periphery, a short flap or tenon separating it from the second nearly umbilical opening, each bordered by a thickened and radially grooved lip. M. Triassic (Anisian) to U. Triassic (Rhaetian); Austria; Italy; Yugoslavia; Bulgaria; Hungary; China. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
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