The milliped family Trichopetalidae, Part 1: Introduction and Genera Trigenotyla Causey, Nannopetalum n. gen., and Causeyella n. gen. (Diplopoda: Chordeumatida, Cleidogonoidea) Author Shear, William A. text Zootaxa 2003 321 1 36 journal article 10.5281/zenodo.157036 8845a192-a81c-4e81-a280-e19c508ce7dd 1175­5326 157036 Nannopetalum vespertilio , n. sp. Figs. 5–7 Types : Male holotype from North Carolina: Henderson Co., Bat Cave, collected in the cave 14 May 1977 by C. Holler (NCMNS). Diagnosis: A very small species of Nannopetalum , lacking ocelli; the gonopod fimbriae are large and prominent. Etymology: The species epithet is a noun in apposition, “bat”, and refers to the type locality. Male holotype : Total length, 3.8 mm; width 0.4 mm. Ocelli absent. Unpigmented. Segmental setae 80% or more of body width, thin and curved; lacking prominent segmental striations; segmental shoulders well­developed, paranota­like. Legpairs three to seven encrassate, pair six the largest. Gonopods ( Fig. 5 ) with sternal lobes much reduced, shifted laterally; coxae with fimbriations becoming larger distally, eventually forming long, branched process; mesal setal group of three on each side shifted laterally; angiocoxites slender, median process short, acute, lateral process blunt, with two thin apical branches ( Fig. 6 ); colpocoxites much reduced but with large fimbirate branches that appear to be basally fused. Ninth legs ( Fig. 7 ) typical; tenth and eleventh legpairs with coxal glands, otherwise unmodified. FIGURES 5–7. Nannopetalum vespertilio , n. sp. 5, gonopods, anterior view. 6, angiocoxite, mesal view. 7. male left ninth leg telopodite, anterior view. Scale lines = 0.1 mm (100 µm). Female unknown. Distribution: Known only from Bat Cave, an unusual granite fissure cave not located in a karst area. Notes: It is not at all clear if this species is really troglobitic. It is the smallest known trichopetalid and one of the smallest of all chilognath millipeds. Nannopetalum fontis , n. sp . Fig. 8 Type : Male holotype and female paratype from Alabama: St. Clair Co., Springville Cave, Springville, collected 31 May 1962 by person or persons unknown (“DZ”) ( FSCA ). Diagnosis: Small, eyeless species with complex gonopods, especially the posterior branch; the gonopods have strongly reduced fimbriae. Etymology: The species epithet is a noun, Latin for “of the spring or fountain,” and refers to the type locality. Male holotype : Total length, 4.75 mm; width 0.5 mm. Unpigmented; eyeless. Segments without evident lateral striations; segmental shoulders moderately developed. Legpairs 3–6 only slightly enlarged, legpair 7 about equal to legpair 12. Gonopods ( Fig. 8 ) with reduced coxosternum. Coxae ( c ) with median group of 2 setae shifted to posterior position, lateral group of 3 setae on prominent shoulders; angiocoxite branch complex ( ac ), with 4 terminations; anterior fimbriae reduced to a few hardly visible scales. Colpocoxites ( cc ) simple, large, lobe­like; fimbriate branch not seen. Ninth legs ( t9 ) typical; prefemur with small terminal nubbin. Legpairs 10 and 11 with glands, coxae not modified. FIGURE 8. Gonopods and ninth legs of Nannopetalum fontis , n. sp. Scale line = 0.1 mm (100 µm). Female paratype : Total length, 4.5 mm; width, 0.5 mm. All somatic characters similar to male. Distribution: Known only from the type collection. Notes: The general appearance of members of this species is that of troglobites. In the vial with the type specimens were a female and an immature specimen of Scoterpes . There are no other records of Scoterpes from Springville Cave, and the only species found in the vicinity is S. syntheticum (Shear) . If the presence of a Scoterpes species in Springville Cave can be verified, this would be the first and only known case of syntopy between two troglobitic trichopetalids.