Cook, O. F.; Collins, G. N. (1895). The Craspedosomatidae of North America. Annals of the New York Academy of Sciences, 9: 1-100. New York, available online athttp://biodiversitylibrary.org/page/35260543 page(s): 6 [details]
Sierwald, P.; Spelda, J. (2023). MilliBase. Ptyoiulus Cook, 1895. Accessed at: https://millibase.org/aphia.php?p=taxdetails&id=892453 on 2023-09-26
original descriptionCook, O. F.; Collins, G. N. (1895). The Craspedosomatidae of North America. Annals of the New York Academy of Sciences, 9: 1-100. New York, available online athttp://biodiversitylibrary.org/page/35260543 page(s): 6 [details]
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