Pimvichai, Piyatida, Henrik Enghoff, and Somsak Panha. 2009. “A Revision of the Thyropygus Allevatus group. Part 1: the T. Opinatus Subgroup (Diplopoda: Spirostreptida: Harpagophoridae)”. Zootaxa 2016 (1). Auckland, New Zealand:17–50. https://doi.org/10.11646/zootaxa.2016.1.2.