original description
Harger, O. (1872). Descriptions of new North-American Myriapods. American Journal of Science, 3(4): 117-121 [details]
additional source
Shear, W. A. (2003). The milliped family Trichopetalidae, part 1: Introduction and genera Trigenotyla Causey, Nannopetalum n. gen., and Causeyella n. gen. (Diplopoda: Chordeumatida: Cleidogonoidea). Zootaxa, 321: 1-36. Auckland [details]
additional source
Shear, William Albert. (2010). The milliped family Trichopetalidae, Part 2: The genera Trichopetalum, Zygonopus and Scoterpes (Diplopoda: Chordeumatida, Cleidogonoidea). Zootaxa, 2385: 1-62 [details]
additional source
Loomis, H. F. (1966). Two new families and other North American Diplopoda of the suborder Chordeumidea. Proceedings of the Biological Society of Washington, 79: 221-230. Washington [details]
From editor or global species database