Takakuwa, Y. (1954). [Diplopoden aus Japan und ihn angrenzenden Gebieten] [Jpn. with Ger. summary]. Japan Society for the Promotion of Science, Tokyo, 1-241 page(s): 43 [details]
Sierwald, P.; Decker, P.; Spelda, J. (2024). MilliBase. Orthomorpha obutusus Takakuwa, 1954. Accessed at: https://www.millibase.org/aphia.php?p=taxdetails&id=942461 on 2025-04-05
original descriptionTakakuwa, Y. (1954). [Diplopoden aus Japan und ihn angrenzenden Gebieten] [Jpn. with Ger. summary]. Japan Society for the Promotion of Science, Tokyo, 1-241 page(s): 43 [details]