Causeyella

Abstract: Introductory materials for a revision of the milliped family Trichopetalidae are presented, and the species of three of the five genera are described (Nannopetalum n. gen., Trigenotyla Causey, 1951, Causeyella, n. gen.). Nannopetalum is related to Trichopetalum, and includes three new species from the Appalachian piedmont: N. pattersonorum (Virginia), N. vespertilio (North Carolina), and N. fontis (Alabama). Trigenotyla Causey includes four species: T. parca Causey (Arkansas), T. vaga Causey (Oklahoma), T. blacki n. sp. (Oklahoma), and T. seminole n. sp. (Oklahoma). Causeyella n. gen. is based on Scoterpes dendropus Loomis (Missouri and Arkansas), and also contains two new species: C. causeyae n. sp. (Arkansas) and C. youngsteatorum n. sp. (Arkansas). Causeyella and Trigenotyla are closely related.