Takayanagi, Y. (1960). Cretaceous foraminifera from Hokkaido, Japan. <em>Science Reports of the Tohoku University.</em> 32(1): 1-154., available online athttp://hdl.handle.net/10097/00104595[details] Available for editors [request]
Hayward, B.W.; Le Coze, F.; Vachard, D.; Gross, O. (2025). World Foraminifera Database. Haplophragmoides horridus Takayanagi, 1960 †. Accessed at: https://www.marinespecies.org/foraminifera/aphia.php?p=taxdetails&id=906078 on 2025-05-26
original descriptionTakayanagi, Y. (1960). Cretaceous foraminifera from Hokkaido, Japan. <em>Science Reports of the Tohoku University.</em> 32(1): 1-154., available online athttp://hdl.handle.net/10097/00104595[details] Available for editors [request]
basis of recordEllis, B. F.; Messina, A. R. (1940-2015). Catalogue of Foraminifera. <em>Micropaleontology Press, American Museum of Natural History, New York.</em> [details]
Present Inaccurate Introduced: alien Containing type locality