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WoRMS taxon detailsRotalidium Asano, 1936
 527933 (urn:lsid:marinespecies.org:taxname:527933)
accepted
Genus
Rotalidium pacificum Asano, 1936 (type by original designation)
Cavarotalia Müller-Merz, 1980 · unaccepted (Opinion of Loeblich & Tappan, 1987)
marine,
Asano, K. (1936). Rotalidium, a New Genus of Foraminifera from the Pacific. <em>Proceedings of the Imperial Academy.</em> 12(10): 350-351., available online at https://doi.org/10.2183/pjab1912.12.350
page(s): p. 350 [details] Available for editors  [request]
Hayward, B.W.; Le Coze, F.; Vachard, D.; Gross, O. (2025). World Foraminifera Database. Rotalidium Asano, 1936. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=527933 on 2025-05-23
Date action by
Nomenclatureoriginal description
Asano, K. (1936). Rotalidium, a New Genus of Foraminifera from the Pacific. <em>Proceedings of the Imperial Academy.</em> 12(10): 350-351., available online at https://doi.org/10.2183/pjab1912.12.350 page(s): p. 350 [details] Available for editors [request]original description (of Cavarotalia Müller-Merz, 1980) Müller-Merz, E. (1980). Strukturanalyse ausgewählter rotaloider Foraminiferen [Structural analysis of selected rotaliid Foraminiferaj. <em>Schweizerische Paläontologische Abhandlungen.</em> 101: 5-70. page(s): p. 36 [details] Available for editors [request]Otheradditional source
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
[request]From editor or global species database
Diagnosis Test lenticular, trochospiral, about four slowly enlarging whorls, the final one with ten to fifteen chambers, sutures limbate, elevated on the spiral side, incised on the umbilical side and leaving wide interlocular spaces with feathered margins, narrow umbilicus with an umbilical plug containing a single vertical cavity in small individuals and numerous irregular vertical canals in larger specimens, umbilical space of preceding whorl covered by umbilical extensions from the chambers to become a broad spiral canal, intraseptal canal system consists of a single broad radial canal in each septum that opens at the peripheral end of the suture on the umbilical side; wall calcareous, finely perforate, spiral side with elevated septal and spiral sutures and ridgelike thickenings near the apex, umbilical side with smooth surface except for the pustulose, ridgelike sutural margins and central umbilical pillars; aperture an interiomarginal arch between the umbilical margin and periphery. U. Miocene to Holocene; Japan; Hong Kong; Borneo; Indian Ocean. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
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