Foraminifera taxon details
Biplanispira Umbgrove, 1937 †
722418 (urn:lsid:marinespecies.org:taxname:722418)
accepted
Genus
Heterospira mirabilis Umbgrove, 1936 † accepted as Biplanispira mirabilis (Umbgrove, 1936) † (type by original designation)
Heterospira Umbgrove, 1936 † · unaccepted (junior homonym of Heterospira...)
junior homonym of Heterospira Koken, 1896
marine, brackish, fresh, terrestrial
fossil only
feminine
Umbgrove, J. H. F. (1937). A new name for the foraminiferal genus Heterospira. <em>Leidsche Geologische Mededeelingen.</em> 8: 309., available online at https://www.repository.naturalis.nl/document/549630
page(s): p. 309 [details] Available for editors
[request]
page(s): p. 309 [details] Available for editors
[request]
Diagnosis Test flattened lenticular to strongly inflated centrally, megalospheric tests up to 4 mm in diameter, possible microspheric...
Diagnosis Test flattened lenticular to strongly inflated centrally, megalospheric tests up to 4 mm in diameter, possible microspheric ones up to 10 mm, planispirally coiled, involute in the early stage, a single whorl of primary chambers with single aperture each, numerous tubular pores radiate from the distal wall of the primary chambers, bifurcating in the equatorial plane, one branch opening at the test surface and the other opening into slowly enlarging secondary chambers that spiral irregularly in two evolute series, one on each side paralleling the equatorial plane, with increasing numbers of chambers per whorl; wall calcareous, thick, and fibrous, lamellar, perforate, umbilical pillars present, with pores opening between the pillars. M. and U. Eocene; Indo-Pacific: Borneo; New Guinea; Saipan Island; E. India; Andaman Islands. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
Hayward, B.W.; Le Coze, F.; Vachard, D.; Gross, O. (2025). World Foraminifera Database. Biplanispira Umbgrove, 1937 †. Accessed at: https://www.marinespecies.org/foraminifera/aphia.php?p=taxdetails&id=722418 on 2026-09-04
Date
action
by
original description
Umbgrove, J. H. F. (1937). A new name for the foraminiferal genus Heterospira. <em>Leidsche Geologische Mededeelingen.</em> 8: 309., available online at https://www.repository.naturalis.nl/document/549630
page(s): p. 309 [details] Available for editors [request]
original description (of Heterospira Umbgrove, 1936 †) Umbgrove, J. H. F. (1936). Heterospira, a new foraminiferal genus from the Tertiary of Borneo. <em>Leidsche Geologische Mededeelingen.</em> 8: 155-157., available online at https://www.repository.naturalis.nl/document/549681
page(s): p. 156 [details] Available for editors [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 [request]
page(s): p. 309 [details] Available for editors
[request]original description (of Heterospira Umbgrove, 1936 †) Umbgrove, J. H. F. (1936). Heterospira, a new foraminiferal genus from the Tertiary of Borneo. <em>Leidsche Geologische Mededeelingen.</em> 8: 155-157., available online at https://www.repository.naturalis.nl/document/549681
page(s): p. 156 [details] Available for editors
[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
[request]
Present Inaccurate Introduced: alien Containing type locality
From editor or global species database
Diagnosis Test flattened lenticular to strongly inflated centrally, megalospheric tests up to 4 mm in diameter, possible microspheric ones up to 10 mm, planispirally coiled, involute in the early stage, a single whorl of primary chambers with single aperture each, numerous tubular pores radiate from the distal wall of the primary chambers, bifurcating in the equatorial plane, one branch opening at the test surface and the other opening into slowly enlarging secondary chambers that spiral irregularly in two evolute series, one on each side paralleling the equatorial plane, with increasing numbers of chambers per whorl; wall calcareous, thick, and fibrous, lamellar, perforate, umbilical pillars present, with pores opening between the pillars. M. and U. Eocene; Indo-Pacific: Borneo; New Guinea; Saipan Island; E. India; Andaman Islands. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
From editor or global species database
Image from typetaxon