Foraminifera taxon details
Duotaxidae Mikhalevich, 2003 †
1831677 (urn:lsid:marinespecies.org:taxname:1831677)
accepted
Family
marine
fossil only
Mikhalevich, V. I. (2003). Systema chetyreoch podklassov s agglutinirovannoj stenkoj rakoviny (Ammodiscana, Miliamminana, Hormosinana, Textulariana) (Foraminifera). [System of the four subclasses with the agglutinated shell wall (Ammodiscana, Miliamminana, Hormosinana, Textulariana) (Foraminifera)]. <em>Rossiskaja Akademija Nauk, Izvestija Zoologicheskogo Instituta.</em> 7: 1-46., available online at https://doi.org/10.13140/2.1.4718.6560
page(s): p. 36. [details]
page(s): p. 36. [details]
Description Family description (emended). Test with a simple, agglutinated, and smooth wall, and absence of endoskeletal structures;...
Description Family description (emended). Test with a simple, agglutinated, and smooth wall, and absence of endoskeletal structures; test conical in shape, trochospiral throughout, circular in cross-section as in Textulariella, with flattened apertural face, chambers broad, not inflated; aperture a wide horizontal slit at the base of the apertural face of the last chamber; the umbilical area is characterized by the presence of supplementary structures in umbilical to extra-umbilical position (Figs 3I, L, 4D, F, I, 5Z, AC) and may be subdivided by a small median lobe bordering a bilobate umbilical depression in Duotaxis (Fig. 3E–F, I, L), or represented by an irregularly developed tri- to tetralobate umbilical depression in Kristanita gen. nov. (Figs 4D, Q, 5D, P, W). The presence of the umbilical cavity confirms the attribution of this family to the order Ataxophragmiida (Mikhalevich 2003, 2004, 2013).
Note: Mikhalevich (2003) erected the new family Duotaxidae with type genus Duotaxis Kristan 1957 that she included in the subclass Ammodiscana Mikhalevich 1980,
class Spirillinata Mikhalevich 1992 (see Mikhalevich 2013).
(Falzoni et al. (2025)).
[details]
Note: Mikhalevich (2003) erected the new family Duotaxidae with type genus Duotaxis Kristan 1957 that she included in the subclass Ammodiscana Mikhalevich 1980,
class Spirillinata Mikhalevich 1992 (see Mikhalevich 2013).
(Falzoni et al. (2025)).
[details]
Hayward, B.W.; Le Coze, F.; Vachard, D.; Gross, O. (2025). World Foraminifera Database. Duotaxidae Mikhalevich, 2003 †. Accessed at: https://marinespecies.org/foraminifera/aphia.php?p=taxdetails&id=1831677 on 2025-09-11
Date
action
by
original description
Mikhalevich, V. I. (2003). Systema chetyreoch podklassov s agglutinirovannoj stenkoj rakoviny (Ammodiscana, Miliamminana, Hormosinana, Textulariana) (Foraminifera). [System of the four subclasses with the agglutinated shell wall (Ammodiscana, Miliamminana, Hormosinana, Textulariana) (Foraminifera)]. <em>Rossiskaja Akademija Nauk, Izvestija Zoologicheskogo Instituta.</em> 7: 1-46., available online at https://doi.org/10.13140/2.1.4718.6560
page(s): p. 36. [details]
taxonomy source Falzoni, F.; Rettori, R.; Gale, L.; Mikhalevich, V. I.; Weinmann, A. E.; Parente, M. (2025). Taxonomy and palaeoecology of the Mesozoic family Duotaxidae Mikhalevich (Foraminifera). <em>Papers in Palaeontology.</em> 11(5): 1-28., available online at https://doi.org/10.1002/spp2.70032 [details] Available for editors
[request]
page(s): p. 36. [details]
taxonomy source Falzoni, F.; Rettori, R.; Gale, L.; Mikhalevich, V. I.; Weinmann, A. E.; Parente, M. (2025). Taxonomy and palaeoecology of the Mesozoic family Duotaxidae Mikhalevich (Foraminifera). <em>Papers in Palaeontology.</em> 11(5): 1-28., available online at https://doi.org/10.1002/spp2.70032 [details] Available for editors
[request]From editor or global species database
Description Family description (emended). Test with a simple, agglutinated, and smooth wall, and absence of endoskeletal structures; test conical in shape, trochospiral throughout, circular in cross-section as in Textulariella, with flattened apertural face, chambers broad, not inflated; aperture a wide horizontal slit at the base of the apertural face of the last chamber; the umbilical area is characterized by the presence of supplementary structures in umbilical to extra-umbilical position (Figs 3I, L, 4D, F, I, 5Z, AC) and may be subdivided by a small median lobe bordering a bilobate umbilical depression in Duotaxis (Fig. 3E–F, I, L), or represented by an irregularly developed tri- to tetralobate umbilical depression in Kristanita gen. nov. (Figs 4D, Q, 5D, P, W). The presence of the umbilical cavity confirms the attribution of this family to the order Ataxophragmiida (Mikhalevich 2003, 2004, 2013).Note: Mikhalevich (2003) erected the new family Duotaxidae with type genus Duotaxis Kristan 1957 that she included in the subclass Ammodiscana Mikhalevich 1980,
class Spirillinata Mikhalevich 1992 (see Mikhalevich 2013).
(Falzoni et al. (2025)).
[details]