Rupidesmus aclys

Bouzan, Rodrigo Salvador, Iniesta, Luiz Felipe M. & Brescovit, Antonio Domingos, 2018, A review of the millipede genus Rupidesmus Schubart, 1952 (Polydesmida: Chelodesmidae), Zootaxa 4434 (3), pp. 589-599: 593

publication ID

https://doi.org/10.11646/zootaxa.4434.3.12

publication LSID

lsid:zoobank.org:pub:EC53AE9C-5516-4172-9DB2-D7C5E47A87E3

persistent identifier

http://treatment.plazi.org/id/A7681F51-AE13-6B7F-CD8C-4D4588AD5B6A

treatment provided by

Plazi

scientific name

Rupidesmus aclys
status

new species

Rupidesmus aclys  new species

Figures 2D–F View Figure , 3D–F View Figure , 6 View Figure

Type material. Male holotype from Fazenda Izabela Hendri , Sabará (43°49'34.29"W, 19°53'4.26"S), Minas Gerais, Brazil, 06.XI.2008, J.P.P. Pena-Barbosa coll., IBSP 2890View Materials.GoogleMaps 

Diagnosis. Adults males of Rupidesmus aclys  n. sp. differ from R. ruber  based on combination of gonopodal characteristics: Prefemoral process directed parallel to acropodital branch ( Fig. 3D View Figure ). Prostatic groove softened and S-shaped along the acropodite, ending upon an elongated prostatic apex ( Fig. 3D View Figure ). Indention restricted to posterior margin. Presence of an acute acropodital process in ectal view ( Fig. 3F View Figure ).

Description. Male (Holotype, IBSPAbout IBSP 2890). Coloration (long-preserved in 70% ethanol): Head reddish brown with a light brown labrum. Antennae light reddish brown with seventh antennomere yellow. Body reddish brown and paranota tip with the same color as the body ( Figs 2D–F View Figure ). Body rings: cuticle smooth; paranota with posterior edges sub-rectangular ( Fig. 2E View Figure ); ozopore posteriorly situated on paranota. Stigma oval. Sternite of body ring 5 with a pair of elongated projections ( Fig. 6D View Figure ). Pair of legs on body ring 3 with coxae possessing a rectangular-shaped genital papilla, and pairs of legs on body rings 5 to 17 with two pairs of rounded projections between coxae ( Fig. 6F View Figure , arrows). Gonopod aperture on seventh body ring ( Fig. 6E View Figure ) elliptical, posterior edge without folds. Legs whitish red, with rounded ventro-apical process on the prefemur and an acute apical-ventral membranous projection on the tibia ( Figs 6A–C View Figure ), leg modifications present in all pairs except the last. Telson with the same color as the body. Total length: 72.5 (Fragmented). Collum 3.07 long, 8.11 wide. Antennomere lengths (1>7): 0.94; 1.93; 1.72; 1.71; 1.83; 1.75; 0.47. Gonopod aperture 1.99 long, 3.05 wide. Telson 2.06 long.

Gonopods ( Figs 3D–F View Figure ): coxae equivalent to about half the length of the telopodite and prominent in ectal view ( Fig. 3F View Figure ). Coxae with two setae on the distal dorsal side and with four setae on distal ventral side. Presence of a spiniform process hidden by the coxa in mesal view (SP; Fig. 3E View Figure ). Cannula: hook-shaped. Prostatic groove softened and S-shaped. Prefemoral region ventrally developed and short, 1/4 length of telopodite. Prefemoral process small and directed parallel to acropodital branch (PfP; Fig. 3D View Figure ). Acropodite elongated and robust (A; Fig. 3D View Figure ); conspicuous indentation restricted to posterior margin of the telopodite ( Fig. 3D View Figure , arrow). Acropodite apex, in ectal view, with an acute acropodital process (AP; Figs 3D, F View Figure ). The posterior edge of apical region ends in a pointed tip ( Figs 3D–F View Figure ).

Female. Unknown.

Distribution. The species is known only from the type locality.

Etymology. The species epithet is a noun in apposition, from the Latin word aclys  meaning “short lance”. The name refers to the shape of the small prefemoral process on the gonopod.

IBSP

Instituto Biologico de Sao Paulo