Maruina (Aculcina) mucugensis sp. nov.

Figs. 7–15

Diagnosis. Vertex 0.3 times the length of the head. Eyes contiguous, with 3 facet rows; interocular suture absent. Wing with R3 connected to R2. CuA2 reaching the wing apex. Hypandrium sclerotized, stripe like. Aedeagus bifid, subcylindrical, fused at apex.

Description. Adult male. Head (Fig. 7): Vertex 0.3 times the length of the head; vertex scar patch without a distinct glabrous central area; eyes contiguous; eye bridge with 3 facet rows; interocular suture absent; frontal scars in two slightly separated patchs. Antenna (Figs. 8–9): scape subcylindrical, approximately the same length of pedicel; pedicel subspherical; flagellum with 13 flagellomeres, all barrel-shaped; a pair of short, single filamented ascoids are presented on flagellomere 3 and following; apiculus absent on flagellomere 13. Palpus formula = 1.0:1.2:1.3:2.1 (Fig. 7). Wing (Figs. 10–11): lanceolate, Sc short, not reaching C; R2+3 and R5 not connected to Rs; R3 connected to R2; R5 ending at tip of wing; M2 not connected to M1; M3 not connected to common vein of M; CuA2 not connected to CuA1; CuA2 reaching C; C with break in the anal area (Fig. 11). Abdomen (Fig. 12): sternites II–V with internal sclerotized chitinous bands without tuft of bristles. Terminalia (Figs. 13–14): hypandrium sclerotized, stripe like, narrow (Fig. 13); gonocoxites longer than wide (Fig. 13); gonostylus with approximately the same length of gonocoxite, with base wider than apex (Fig. 13); ejaculatory apodeme 2.0 times the length of gonocoxite, hemicircular (Fig. 13). Aedeagus symmetrical, bifid, subcylindrical (Fig. 13); aedeagal spines lacking. Parameral sheath present, subcylindrical with distal apex tectiform (Fig. 13), ventrally complex, with sclerite anteriorly bifid articulated to gonocoxal apodemes (Fig. 14). Epandrium plate-like (Fig. 13); subepandrial sclerite Y-shaped, with distal arms sclerotized; hypoproct micropilose, (Fig. 13); epiproct smaller than hypoproct, triangular ending after the distal margin of hypropoct (Fig. 13); cerci digitiform, 2.2 times the length of gonostylus with one apical tenaculum (Fig. 13).

Female (Fig. 15). Similar to male except for the following: subgenital plate wider basally; hypovalve bifid; oviduct as figured; cerci conical wider basally with a basal rugose area in the ventral surface.

Distribution. Known only from the type locality.

Type material. Holotype: 1♂, BRAZIL, Bahia, Mucugê, Projeto Sempre Viva, 12°59’32.3”S 41°20’31.2”W, 945 m asl, 15.v.2015, Bravo, F. col. (MZFS). Paratypes : 13 ♂ and 27 ♀ same data as holotype (8 ♂ and 20 ♀ (MZFS); 5 ♂ and 7 ♀ (BMNH).

Etymology. The name of the species is based on type locality.

Remarks. The presence of internal sclerotized chitinous bands in the abdominal sternites II–V in Maruina mucugensis sp. nov., is a unique characteristic between the Maruina species. Sternal sclerotized chitinous bands are observed for three species of Maruina (Aculcina) . In M. caceresi Wagner, 1988 and M. guria the sclerotized chitinous bands are present in sternites V–VIII and M. colombicana Wagner & Joost, 1994 in sternites VI–VIII. Wagner & Joost (1994) proposed that the sclerotized bands keep the abdomen retracted through the action of muscles attached to them.