Thiele, J. (1912). Die antarktischen Schnecken und Muscheln. <em>Deutsche Südpolar-Expedition, 1901-1903, im Auftrage des Reichsamtes des Innern. Wissenschaftliche Ergebnisse.</em> 13, Zoologie 5(2): 185-285, pls 11-19., available online athttps://www.biodiversitylibrary.org/page/11631552 page(s): 191, pl. XI, fig. 23 [details]
MolluscaBase eds. (2024). MolluscaBase. Cirsonella extrema Thiele, 1912. Accessed through: RAS (Eds.) (2024) Register of Antarctic Species at: https://ras.biodiversity.aq/aphia.php?p=taxdetails&id=197116 on 2025-03-22
RAS (Eds.) (2025). Register of Antarctic Species. Cirsonella extrema Thiele, 1912. Accessed at: https://ras.biodiversity.aq/aphia.php/aphia.php?p=taxdetails&id=197116 on 2025-03-22
original descriptionThiele, J. (1912). Die antarktischen Schnecken und Muscheln. <em>Deutsche Südpolar-Expedition, 1901-1903, im Auftrage des Reichsamtes des Innern. Wissenschaftliche Ergebnisse.</em> 13, Zoologie 5(2): 185-285, pls 11-19., available online athttps://www.biodiversitylibrary.org/page/11631552 page(s): 191, pl. XI, fig. 23 [details]
context source (Deepsea)Intergovernmental Oceanographic Commission (IOC) of UNESCO. The Ocean Biogeographic Information System (OBIS), available online athttp://www.iobis.org/[details]
basis of recordEngl, W. (2012). <i>Shells of Antarctica</i>. Hackenheim: Conchbooks. 402 pp. [details]
additional sourceEgorova, E. (1982). Biological results of the Soviet Antarctic expeditions, 7. Molluscs of the Davis Sea [Егорова Э.Н. Результаты биологических исследований советских антарктических экспедиций. Вып. 7. Моллюски моря Дейвиса (Восточная Антарктика)]. <em>Explorations of the Fauna of the Seas [Исследования фауны морей].</em> 26(34): 1-142 [In Russian]., available online athttp://ashipunov.me/shipunov/school/books/egorova1982_moll_morja_dejvisa_ifm_26_34.djvu page(s): 21, fig. 99 [details]