Foraminifera taxon details
Stewartina Wilde, 1971 †
890729 (urn:lsid:marinespecies.org:taxname:890729)
accepted
Genus
Pseudofusulina moranensis Thompson, 1954 † accepted as Stewartina moranensis (Thompson, 1954) † (type by original designation)
- Species Stewartina acutosaxis Magginetti, Stevens & Stone, 1988 †
- Species Stewartina columna (Wilde, 2006) †
- Species Stewartina convexa (Thompson, 1954) †
- Species Stewartina gigantea Magginetti, Stevens & Stone, 1988 †
- Species Stewartina habrokelyph Magginetti, Stevens & Stone, 1988 †
- Species Stewartina laxissima (Dunbar & Skinner, 1937) †
- Species Stewartina loringi (Thompson, 1954) †
- Species Stewartina magnifica Stevens & Stone, 2007 †
- Species Stewartina montanensis (Frenzel & Mundorff, 1942) †
- Species Stewartina moranensis (Thompson, 1954) †
- Species Stewartina multispira (Thompson & Hazzard, 1946) †
- Species Stewartina patens (Dunbar & Newell, 1946) †
- Species Stewartina pendula (Wilde, 2006) †
- Species Stewartina robleda (Thompson, 1954) †
- Species Stewartina texana (Dunbar & Skinner, 1937) †
- Species Stewartina titanokelyph Magginetti, Stevens & Stone, 1988 †
- Species Stewartina uber (Thompson & Hazzard, 1946) †
- Species Stewartina ultimata Stevens & Stone, 2007 †
- Species Stewartina needhami (Thompson, 1954) † accepted as Pseudoschwagerina needhami Thompson, 1954 † (unaccepted > superseded combination, Opinion of Lucas et al. (2015))
marine, brackish, fresh, terrestrial
fossil only
feminine
Wilde, G. L. (1971). Phylogeny of Pseudofusulinella and its bearing on Early Permian stratigraphy; in Dutro, J.T. (ed.), Paleozoic perspectives, a paleontological tribute to G. Arthur Cooper. <em>Smithsonian Contributions to Paleobiology.</em> 3: 363-379., available online at https://doi.org/10.5479/si.00810266.3.1
page(s): p. 375 [details] Available for editors
[request]
page(s): p. 375 [details] Available for editors
[request]
Original description The species described by Thompson (1954) as Pseudofusulina possess certain unique characters which place them between...
Taxonomic remark Discussion. The genus Stewartina was proposed by Wilde (1971) to embrace several species of fusulinids that have characters...
Original description The species described by Thompson (1954) as Pseudofusulina possess certain unique characters which place them between typical Schwagerina Moeller and Pseudoschwagerina Dunbar and Skinner. Low, rounded septal folds, tightly coiled juvenaria followed by some inflation of outer whorls, and chomata in the two inner volutions are similar to Pseudoschwagerina texana Dunbar and Skinner. Lack of well-defined inflation and thickness of spirotheca are more like Schwagerina.
(Wilde (1971)). [details]
(Wilde (1971)). [details]
Taxonomic remark Discussion. The genus Stewartina was proposed by Wilde (1971) to embrace several species of fusulinids that have characters...
Taxonomic remark Discussion. The genus Stewartina was proposed by Wilde (1971) to embrace several species of fusulinids that have characters that place them between typical Schwagerina and Pseudoschwagerina. Pseudofusulina? moranensis Thompson was selected as the type species. Because we have discovered a wide range of species in the Owens Valley Group closely related to S. moranensis, being characterized by an elongate inflated shape, the general absence of a well-defined juvenarium, the presence of highly developed chomata in the inner volutions, and the presence of moderately to highly and generally irregularly folded septa throughout—all characteristics of the genotype—we here emend the concept of Stewartina to include these species. Thus defined, Stewartina is distinguished from Pseudoschwagerina by the absence of a well-defined juvenarium and by a generally large proloculus; from Schwagerina by the presence of well-developed chomata in the inner volutions; from Triticites by its more highly folded septa, the presence of chomata only in the inner volutions, and its large size; from Occidentoschwagerina by its development of massive chomata and generally more highly folded septa; and from Reticulosepta, n. gen. in having less highly folded septa, lacking cuniculi, and generally having less highly developed chomata.
(Magginetti et al. (1988)). [details]
(Magginetti et al. (1988)). [details]
Hayward, B.W.; Le Coze, F.; Vachard, D.; Gross, O. (2025). World Foraminifera Database. Stewartina Wilde, 1971 †. Accessed at: https://www.marinespecies.org/Foraminifera/aphia.php?p=taxdetails&id=890729 on 2026-06-18
Date
action
by
original description
Wilde, G. L. (1971). Phylogeny of Pseudofusulinella and its bearing on Early Permian stratigraphy; in Dutro, J.T. (ed.), Paleozoic perspectives, a paleontological tribute to G. Arthur Cooper. <em>Smithsonian Contributions to Paleobiology.</em> 3: 363-379., available online at https://doi.org/10.5479/si.00810266.3.1
page(s): p. 375 [details] Available for editors [request]
page(s): p. 375 [details] Available for editors
[request]From editor or global species database
Original description The species described by Thompson (1954) as Pseudofusulina possess certain unique characters which place them between typical Schwagerina Moeller and Pseudoschwagerina Dunbar and Skinner. Low, rounded septal folds, tightly coiled juvenaria followed by some inflation of outer whorls, and chomata in the two inner volutions are similar to Pseudoschwagerina texana Dunbar and Skinner. Lack of well-defined inflation and thickness of spirotheca are more like Schwagerina. (Wilde (1971)). [details]
Taxonomic remark Discussion. The genus Stewartina was proposed by Wilde (1971) to embrace several species of fusulinids that have characters that place them between typical Schwagerina and Pseudoschwagerina. Pseudofusulina? moranensis Thompson was selected as the type species. Because we have discovered a wide range of species in the Owens Valley Group closely related to S. moranensis, being characterized by an elongate inflated shape, the general absence of a well-defined juvenarium, the presence of highly developed chomata in the inner volutions, and the presence of moderately to highly and generally irregularly folded septa throughout—all characteristics of the genotype—we here emend the concept of Stewartina to include these species. Thus defined, Stewartina is distinguished from Pseudoschwagerina by the absence of a well-defined juvenarium and by a generally large proloculus; from Schwagerina by the presence of well-developed chomata in the inner volutions; from Triticites by its more highly folded septa, the presence of chomata only in the inner volutions, and its large size; from Occidentoschwagerina by its development of massive chomata and generally more highly folded septa; and from Reticulosepta, n. gen. in having less highly folded septa, lacking cuniculi, and generally having less highly developed chomata.
(Magginetti et al. (1988)). [details]
From editor or global species database
Image from typetaxon