Foraminifera taxon details
Monotaxinoides Brazhnikova & Yartseva, 1956 †
721347 (urn:lsid:marinespecies.org:taxname:721347)
accepted
Genus
Monotaxinoides transitorius Brazhnikova & Yartseva, 1956 † (type by original designation)
- Species Monotaxinoides gracilis (Dain in Reitlinger, 1956) †
- Species Monotaxinoides guangxiensis Lin, 1978 †
- Species Monotaxinoides irregularis (Reitlinger, 1950) †
- Species Monotaxinoides minutissimus (Sosnina, 1976) †
- Species Monotaxinoides transitorius Brazhnikova & Yartseva, 1956 †
- Species Monotaxinoides caprariensis Vachard, 1977 † accepted as Hemidiscopsis caprariensis (Vachard, 1977) † (Type species of Hemidiscopsis)
- Species Monotaxinoides convexus Brazhnikova, 1983 † accepted as Howchinia convexa (Brazhnikova, 1983) † (Opinion of Cózar et al. (2015))
- Species Monotaxinoides declivis (Ganelina, 1956) † accepted as Hemidiscopsis declivis (Ganelina, 1956) † (unaccepted > superseded combination)
- Species Monotaxinoides melanogaster Yarahmadzahi & Vachard, 2019 † accepted as Turrispiroides melanogaster (Yarahmadzahi & Vachard, 2019) † accepted as Nigrispiroides melanogaster (Yarahmadzahi & Vachard, 2019) † (unaccepted > superseded combination, Opinion of Lucas et al. (2022))
- Species Monotaxinoides planus (Cózar in Cózar, Sanz-López & Blanco-Ferrera, 2015) † accepted as Howchinia plana Cózar in Cózar, Sanz-López & Blanco-Ferrera, 2015 † (unaccepted > superseded combination)
- Species Monotaxinoides priscus Brazhnikova & Yartseva, 1956 † accepted as Hemidiscopsis priscus (Brazhnikova & Yartseva, 1956) † accepted as Hemidiscopsis prisca (Brazhnikova & Yartseva, 1956) † (Opnion of Cózar et al. (2015))
- Species Monotaxinoides subconicus (Brazhnikova & Yartseva, 1956) † accepted as Howchinia subconica (Brazhnikova & Yartseva, 1956) † (unaccepted > superseded combination)
- Species Monotaxinoides subplanus (Brazhnikova & Yartseva, 1956) † accepted as Howchinia subplana (Brazhnikova & Yartseva, 1956) †
marine, brackish, fresh, terrestrial
fossil only
masculine
Brazhnikova, N. E.; Yartseva, M. V. (1956). К вопросу об эволюции рода Monotaxis - To the question of evolution of the genus Monotaxis. <em>Академия наук СССР Вопросы микропалеонтологии - Academy of Sciences USSR Questions of Micropaleontology.</em> 1: 62-68., available online at http://www.ginras.ru/library/pdf/01_1956_voprosy_mikropaleontologii.pdf
page(s): p. 65 [details] Available for editors
[request]
page(s): p. 65 [details] Available for editors
[request]
Diagnosis Spherical proloculus followed by tubular or hemicylindrical second chamber that is trochospirally coiled in a low cone to...
Diagnosis Spherical proloculus followed by tubular or hemicylindrical second chamber that is trochospirally coiled in a low cone to nearly planispiral, similar to Howchinia but less high spired, spiral suture may be slightly depressed; wall calcareous, of two layers, a dark microgranular inner layer and a pseudofibrous outer layer that expands into an umbilical filling on the concave side of the test; aperture a simple opening at the end of the tubular chamber, lacking the supplementary apertures found in Eolasiodiscus. Carboniferous; USSR; Canada; USA. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
Hayward, B.W.; Le Coze, F.; Vachard, D.; Gross, O. (2025). World Foraminifera Database. Monotaxinoides Brazhnikova & Yartseva, 1956 †. Accessed at: https://www.marinespecies.org/Foraminifera/aphia.php?p=taxdetails&id=721347 on 2026-04-30
Date
action
by
original description
Brazhnikova, N. E.; Yartseva, M. V. (1956). К вопросу об эволюции рода Monotaxis - To the question of evolution of the genus Monotaxis. <em>Академия наук СССР Вопросы микропалеонтологии - Academy of Sciences USSR Questions of Micropaleontology.</em> 1: 62-68., available online at http://www.ginras.ru/library/pdf/01_1956_voprosy_mikropaleontologii.pdf
page(s): p. 65 [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. 65 [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]From editor or global species database
Diagnosis Spherical proloculus followed by tubular or hemicylindrical second chamber that is trochospirally coiled in a low cone to nearly planispiral, similar to Howchinia but less high spired, spiral suture may be slightly depressed; wall calcareous, of two layers, a dark microgranular inner layer and a pseudofibrous outer layer that expands into an umbilical filling on the concave side of the test; aperture a simple opening at the end of the tubular chamber, lacking the supplementary apertures found in Eolasiodiscus. Carboniferous; USSR; Canada; USA. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
From editor or global species database
Image from typetaxon