Eucampesmella tricuspis ( Attems, 1931 )

Bouzan, Rodrigo S., Iniesta, Luiz Felipe M., Pena-Barbosa, João Paulo P. & Brescovit, Antonio D., 2021, Six new species of the widespread Brazilian millipede genus Eucampesmella (Polydesmida: Chelodesmidae), Zoologia (e 66300) 38, pp. 1-22 : 6-9

Eucampesmella tricuspis ( Attems, 1931)

Figs 25−29

Pseudoleptodesmus (Pseudoleptodesmus) tricuspis Attems, 1931: 27 , fig. 37-39 (Male holotype from Brazil, deposited in NHMW, examined). Leptodesmus (Pseudoleptodesmus) tricuspis : Attems, 1938: 41, fig. 44. Leptodesmus tricuspis : Schubart, 1946: 196. Pseudoleptodesmus tricuspis : Hoffman, 1953: 124. Eucampesmella triscuspis : Schubart, 1955: 509. Eucampesmella tricuspis : Hoffman, 1967: 186; 1990a: 170.

Diagnosis. Males of Eucampesmella tricuspis differ from all other species of the genus by the presence of an enlarged spoon-shaped acropodital process with serrated apical margin ( Fig. 29); prefemoral process with spear-shaped tip, and small subtriangular projection, curved mesad ( Fig. 29).

Redescription. Male (Holotype, NHMW). Total length 40, width 6.6. Coloration (long-preserved in 70% ethanol): Head light brown; with three pairs of setae between the antennae (row 0, 1 and 2); clypeus with few random setae. Antennae light brown to brownish. Body brown and paranota tip whitish ( Figs 25−27). Body rings: cuticle rough; paranota with posterior edges rounded; ozopore posteriorly situated on paranota. Stigma oval, almost flat. Sternite of body ring 4 with a pair of projections; Sternite of body ring 5 with two pairs of setose projections, the anterior are place together and are more conspicuous, the posterior are placed far apart. Sternite of body ring 6 without projections, but the anterior zone between the coxae has a cluster of setae. Post-gonopodal sternites without setae and with low projections next to each coxae. Gonopod aperture on body ring 7 elliptical, posterior edge with prominent folds; in anal view the posterior margin is protuberant and rounded. Legs light brown; presence of a pronounced dorsal lobe and a ventro-apical projection on the prefemur of the anterior legs; anterior legs ventrally rather setose; more setae ventrally on the legs; posterior legs ventrally with few very thin setae, coxae and prefemur each with a single long setae. Telson brown with the tip of the posterior margin whitish .

Gonopods ( Figs 28, 29): coxae well developed, almost covering the entire prefemoral region, in ectal view. Cannula broken. Telopodite with the main branch of the prefemoral process and both branches of the acropodite equally long [prefemoral process the same size of the acropodite], slender straight spikes, parallel to each other. Prefemoral process with a second smaller branch, curved mesad ( Fig. 29). Acropodital process enlarged, with some indentations in the apical margin ( Fig. 29); solenomere long and slender ( Fig. 29).

Female. Unknown.

Remarks. The type-material from NHMW is partially in good conditions, with body intact and well-preserved. However, the gonopods slides are broken and further details are impossible to extract ( Fig. 28).

Distribution. Brazil, without specific locality.