Lanta borgesae Rocha

Valverde, Alejandra C., Crespo, Francisco A. & Iglesias, Mónica S., 2016, Contribution to the knowledge of Lanta Hebard, 1921, with remarks on some male genital characters (Blattaria, Ectobiidae), Zootaxa 4092 (1), pp. 140-144 : 141-142

Lanta borgesae Rocha e Silva & Vasconcellos, 1984.

( Figures 1–24 )

Material examined. Holotype (male) from Brazil, Araras, São Paulo (- 22.355696°S, - 47.365869°W), in light trap (J. Borges col.) (MNRJ). Additional specimens (MACN): ARGENTINA, 2 males (MACN-Ent 48920 & MACN-Ent 48921[reversed terminalia]), Misiones Province: Parque Provincial Salto Encantado (- 27.002452°S, - 54.905089°W), I/ 2006 (E.B. Angrisano & W. Bravo col.), 1 male, Puerto Bossetti (- 25.864027°S, - 54.583531°W), I/1964 (J.M. Viana col.); BRAZIL, Nova Teutônia (- 27.162469°S, - 52.422892°W), 1937 (F. Plaumann col.).

Distribution. Argentina: Misiones Province, Parque Provincial Salto Encantado and Puerto Bossetti. Brazil: Nova Teutônia (Santa Catarina) and Araras (São Paulo).

Redescription (male). Habitus: body slender, small size, body length (mm) 7.2–9.0 (male reversed terminalia 7.8 mm), body surface entirely covered with scattered pilosity.

Body coloration. Head shiny black, mouthparts and maxillary palpi light brown ( Fig. 1 ). Pronotum black, darker on disk, and lateral borders with chestnut brown bands ( Fig. 2 ). Tegminae orange-brown ( Fig. 3 ), wings translucid, its surface slightly tinged with brown ( Fig. 4 ). Legs and abdomen pale brown.

Head. Interocular distance larger than distance between antennal sockets ( Fig. 1 ). Fifth segment of maxillary palp somewhat longer than the fourth but similar to the third.

Thorax. Pronotum moderately convex, disc with two slight impressions converging anteriorly and posteriorly, maximum width meso-caudad ( Fig. 2 ). Tegminae and wings fully developed ( Figs 3–4 ), the former hirsute; radial vein with 24–28 branches reaching the margin, 10–11 parallels and the last 4–5 branched, media vein with 3 branches reaching the margin (the first one of them subdividing near the apex), cubital anterior vein with 6–8 branches reaching the margin, all originating from the subdivision of a basal branch, and 5 anal veins. Wing venation as in Fig. 4 . Radial sector and media vein (not branched) are connected by less than 10 cross-veins; cubital anterior forks, with both branches subtending two cross veins in between. Forefemora with ventro-cephalic margins armed with two spaced, heavy spines, followed by a row of minute chaetiform spines that ends in two elongated spines ( Fig. 9 ). Pulvilli, arolium and tarsal claws moderately developed.

Abdomen. Dorsal surface of the abdomen unspecialized. Supra-anal plate moderately produced, blunt ( Figs 6, 10– 11 ). Subgenital plate asymmetrical ( Figs 5, 14 ), both styli visible in ventral view and placed at the apex of subgenital plate, its margin between styli sinuated; left stylus rod-like, long and hairy, right stylus shorter and roughly rounded, more glabrous and bearing minute spines ( Fig. 15 ).

Male genitalia. Genital chamber with two dorsal paraprocts ( Fig. 7 ) and two ventral phallomeres ( Fig. 8 ). The left complex is subdivided in L2 and L3. L2 is medially located, very long and rodlike, sigmoid and thin, widening apically. The via process has two projections, one ventral and another dorsolateral toothed. The angle delimitated by L2 and the via process is about 130° ( Figs 18–20 ). L3 invaginates into a membranous pouch and thus it can protrude from the genital chamber; in the dorsal view, its hook-like apex is curved to the left ( Figs 16–17 ). The right phallomere R is a complex of sclerites intimately articulated ( Figs 21–23 ). In this assembly, the rod-like and distally forked R3 sclerite is the most externally positioned, it articulates with piriform sclerite R1P and R6; R1S joins R2 on a bulge-like cuticle thickening in the interior, cwe (Klass 1997); R2 projects apically in a lamina ( Fig.21 ). R4 is a long, narrow and flattened sclerite with a finger-like process ( Fig. 24 ); it is dorsally placed over the piriform sclerite ( Figs 22–23 ) in a plane transversal to the longitudinal body axis, connecting piriform R1P with R2+R1S. R6 is a new sclerite ( Fig. 21 ) that belongs to the right phallomere. It has an inverted V shape, with arms directed posteriorly. Figures 12–13 shows R 6 in the type of L. borgesae .

Figures

FIGURES 1 – 24. Lanta borgesae. 1. Head, ventral view. 2. Pronotum, dorsal view. 3. Tegmen. 4. Wing. 5. Subgenital plate, ventral view. 6. Supra-anal plate, dorsal view. 7. Paraprocts and supra-anal plate, ventral view. 8. Diagram of the genital sclerite disposition, dorsal view. 9. Fore leg femur spines, anterior view. 10 – 11. Supra-anal plate, dorsal view. 12 – 13. Sclerite R 6 of right phallomere. 14. Subgenital plate, dorsal view. 15. Styli, dorsal view. 16 – 17. L 3, sclerite of left complex, ventral view. 18. L 2 + via, sclerites of the left complex, ventral view. 19 – 20. Apex of L 2 + via, ventral view. 21 – 23. Right phallomere, ventral view. 24. R 4, scheme. Abbreviations A = anal veins; cwe = R 1 S with R 2 is joined in a bulge-like cuticle; Cu a = cubital anterior vein; dp = dorsal process; L 2 + via and L 3 = sclerite of the left complex; M = medial veins; P = paraprocts; R = radial veins; Rs = radial sector; R 1 P, R 1 S, R 2, R 3, R 4, R 6 = right phallomere sclerites; S IX = sternite IX; Sc = subcostal vein; st = styli; T X = tergite X; vp = ventral process. Scales. Figs 1 – 9: 1 mm and Figs 10 – 24: 0.1 mm.