Pseudonannolene pusilla Silvestri, 1895

Pseudonannolene pusilla Silvestri, 1895 View in CoL

Figs 111–112 View Fig View Fig , 176A View Fig , 178H View Fig , 186 View Fig

Pseudonannolene pusilla Silvestri, 1895b: 7 View in CoL , fig. 13.

Pseudonannolene pusilla View in CoL – Silvestri 1902: 23. — Schubart 1958: 240. — Viggiani 1973: 367. — Jeekel 2004: 90. — Golovatch et al. 2005: 279. — Iniesta & Ferreira 2013a: 92; 2013c: 79.

Diagnosis

Males of P. pusilla resemble those of P. morettii sp. nov. by having short coxae on the first leg-pair with a constriction at about midlength ( Fig. 112A View Fig ), but differing by the absence of long scattered setae on the mentum and stipes ( Fig. 176A View Fig ); solenomere short and subtriangular ( Fig. 112D View Fig ).

Etymology

Named after the Latin adjective ‘ pusillus ’ (feminine ‘ pusilla ’) = ‘very little’, ‘tiny’. Unspecified in the original description.

Material examined (total: 5 ♂♂, 2 ♀♀, 3 immatures)

BRAZIL – Mato Grosso • 2 ♂♂; Pindaíba , Barra das Garças; [ -15.881182, -52.238738]; 337 m a.s.l.; 19–31 Jan. 1998; M.E.V. Callefo leg.; IBSP 13390 View Materials GoogleMaps • 3 ♂♂, 2 ♀♀, 3 immatures; same collection data as for preceding; IBSP 13391 View Materials GoogleMaps .

Descriptive notes

MEASUREMENTS. 55–57 body rings (1 apodous + telson). Males: body length 39.7 mm; maximum midbody diameter 2.4 mm. Females: body length 43.1–44 mm; maximum midbody diameter 3.7–4 mm.

COLOR. Body color brownish grey; head and collum darker; prozonites anteriorly greyish; metazonites with a posterior band lighter; antennae and legs brownish.

HEAD. Antennae long ( Fig. 111A View Fig ), just reaching back to end of ring 6 when extended dorsally; antennomeres elongated; relative antennomere lengths 1<2<3>4=5≈6>7. Mandibular cardo with ventral margin narrow. Ommatidial cluster well-developed, elliptical; ca 40 ommatidia in 5 rows.

BODY RINGS. Collum with lateral lobes rounded, with ca 12 striae, strongly curved ectad ( Fig. 111A View Fig ). Very faintly constricted between prozonite and metazonite; prozonites smooth; metazonites laterally with transverse striae above ozopore in anterior body rings. Anterior sterna in midbody rings subrectangular, without transverse striae ( Fig. 176A View Fig ).

FIRST LEG-PAIR OF MALES. Coxae ( cx) short (less than half of remaining podomere lengths), subtriangular, with the base strongly arched and constricted medially, sparsely setose ( Fig. 112A View Fig ); prefemoral process ( prf) less than half of prefemur, subcylindrical, densely setose up to its median region ( Fig. 112B View Fig ); remaining podomeres with setae along the mesal region.

SECOND LEG-PAIR OF MALES. Coxa ( cx) rounded; penis ( pn) located at proximal region, rounded, not extended basally ( Fig. 112C View Fig ); prefemur compressed dorsoventrally; remaining podomeres setose.

GONOPODS. Gonocoxa ( gcx) elongated, twice longer than telopodite, with the base arched; antero-posteriorly flattened ( Fig. 112D–F View Fig ); with rows of papillae mesally. Seminal groove ( sg) curved; arising medially on mesal cavity and terminating apically on the seminal apophysis ( sa). Shoulder ( sh) inconspicuous. Telopodite ( tp) almost as wide as gcx ( Fig. 112D View Fig ); solenomere ( sl) with small squamous region; apicomesal process ( amp) subtriangular; ectal process absent; sa located at mesal portion, slightly visible apically in oral view ( Fig. 112F View Fig ). Internal branch ( ib) subtriangular, narrow and foliaceous, surrounding basally tp as a shield; ib with setae along its entire margin nearly not exceeding apically seminal region of sl ( Fig. 112D–F View Fig ).

VULVAE. As typical for the genus. Bursa subtriangular, glabrous ( Fig. 178H View Fig ); internal valve subtriangular, with its sides having the same length; operculum slightly curved ectad; external valve large, subtriangular.

Distribution

Known from Cerrado biome in the west region of Mato Grosso State, Brazil; other records from the literature for the Brazilian states of Mato Grosso do Sul and Goiás, and region of the Chaco in Argentina and Paraguay ( Fig. 186 View Fig ).

Comments

The type material was described by Silvestri (1895b) and supposedly deposited at the Museo Regionale Scienze Naturali, Torino, Italy (MRSN) ( Viggiani 1973: 367), but was not found. Nevertheless, neartopotypes from Mato Grosso were examined ( Fig. 186 View Fig ). Other specimens from Brazil ( Goiás, Mato Grosso, and Mato Grosso do Sul) and Paraguay ( Asunción) were recorded by Silvestri (1902).