Foraminifera taxon details
Palaeomiliolina difficilis (Wiśniowski, 1890) †
1557836 (urn:lsid:marinespecies.org:taxname:1557836)
accepted
Species
Sigmoilina difficilis (Wiśniowski, 1890) † · unaccepted
Spiroloculina difficilis Wiśniowski, 1890 † · unaccepted (Opinion of Pazdro (1972))
marine, brackish, fresh, terrestrial
fossil only
(of Spiroloculina difficilis Wiśniowski, 1890 †) Wiśniowski, T. (1890). Mikrofauna iłów ornatowych okolicy Krakowa. Cz. 1. Otwornice górnego kellowayu w Grojcu-Foraminifera of the Kelloways Beds of Grojec. <em>Pamiętnik Ak. Umiej. Krakowie.</em> 17: 181-242., available online at http://www.paleo.pan.pl/people/archive/Wisniowski/Wisniowski_1.pdf [details] 
Hayward, B.W.; Le Coze, F.; Vachard, D.; Gross, O. (2025). World Foraminifera Database. Palaeomiliolina difficilis (Wisniowski, 1890) †. Accessed at: https://www.marinespecies.org/foraminifera/aphia.php?p=taxdetails&id=1557836 on 2026-10-11
Date
action
by
original description
(of Spiroloculina difficilis Wiśniowski, 1890 †) Wiśniowski, T. (1890). Mikrofauna iłów ornatowych okolicy Krakowa. Cz. 1. Otwornice górnego kellowayu w Grojcu-Foraminifera of the Kelloways Beds of Grojec. <em>Pamiętnik Ak. Umiej. Krakowie.</em> 17: 181-242., available online at http://www.paleo.pan.pl/people/archive/Wisniowski/Wisniowski_1.pdf [details]
new combination reference Pazdro, O. (1972). Remarks on the genera Ophthalmidium and Palaeomiliolina (Foraminiferida). <em>Acta Palaeontologica Polonica.</em> 17(4): 527-560., available online at https://www.app.pan.pl/archive/published/app17/app17-527.pdf [details] Available for editors
[request]
new combination reference Pazdro, O. (1972). Remarks on the genera Ophthalmidium and Palaeomiliolina (Foraminiferida). <em>Acta Palaeontologica Polonica.</em> 17(4): 527-560., available online at https://www.app.pan.pl/archive/published/app17/app17-527.pdf [details] Available for editors
[request]