(ofCalcisphaera cancellata Williamson, 1880 †)Williamson, W. C. (1880). On the Organization of the Fossil Plants of the Coal-Measures. Part X. Including an Examination of the Supposed Radiolarians of the Carboniferous Rocks. <em>Philosophical Transactions of the Royal Society of London.</em> 171(0): 493-539., available online athttps://archive.org/details/philtrans04248024 page(s): p. 521 pl. 20 fig. 79 [details]
Hayward, B.W.; Le Coze, F.; Vachard, D.; Gross, O. (2025). World Foraminifera Database. Palaeocancellus cancellatus (Williamson, 1880) †. Accessed at: https://marinespecies.org/foraminifera/aphia.php?p=taxdetails&id=1055276 on 2025-05-19
original description(ofCalcisphaera cancellata Williamson, 1880 †)Williamson, W. C. (1880). On the Organization of the Fossil Plants of the Coal-Measures. Part X. Including an Examination of the Supposed Radiolarians of the Carboniferous Rocks. <em>Philosophical Transactions of the Royal Society of London.</em> 171(0): 493-539., available online athttps://archive.org/details/philtrans04248024 page(s): p. 521 pl. 20 fig. 79 [details]