Titanogryllus oxente Souza-Dias & de Mello n. sp.

Figures 1C, 11–12, 13B

http://lsid.speciesfile.org/urn:lsid: Orthoptera .speciesfile.org:TaxonName:501949

Type locality. Brazil, Bahia State, municipality of Porto Seguro.

Etymology. Oxente is a common expression used in the daily speech of the inhabitants of Northeastern Brazil. Oxente is an interjection of astonishment, doubt, frustration, impatience, surprise. The word is a noun in apposition.

Distribution. Atlantic Forest, in Bahia State, municipalities of Porto Seguro and Itamaraju.

Type material. Holotype, 4 male paratypes. Holotype: male, with genitalia removed and kept with the specimen, labeled “ Campo 0 0 0 3 Mison [Misonete Costa, leg.]. Sul da Bahia ( Porto Seguro). 23/10/2003 . (BOTU). Paratypes: 4 males. 1 male, subgenital plate and genitalia removed, labeled “ Brasil ( Ba) [Bahia], Trancoso. Sperber, leg. 22.ix.2006 ” (MZSP) . 1 male labeled “BR, BA [Bahia], Itamaraju. Parque Nacional do Monte Pascoal. 08-11.iii.2012. Dias, P.G.B.S. et al., col.” (MZSP) ; 1 male, same data as the previous paratype (BOTU); 1 male labeled “ Brasil ( Ba) [Bahia], Trancoso. Sperber, leg. 22.ix.2006 ” (BOTU).

Diagnosis. Species large (~ 3cm body length), general coloration medium to dark brown. Male genitalia: anterior margin of pseudepiphallic sclerite without medial furrow; lateral lophi bifurcated, inner margins of distal part touching each other; medial lophi wide, rounded, posterior margin concave; pseudepiphallic parameres not surpassing the apex of lateral lophi, apex pointed.

Description. In addition to the characters of the genus:

General coloration medium to dark brown (Figs. 1C, 11A). Head. Head large, wider than long, medium brown (Figs. 1C, 11A–D). Posterior margin of occiput medium brown (Figs. 11A, B). Occiput and vertex glabrous (Figs. 11A–D). Eyes small, without unpigmented area (Figs. 11B, C). Fastigium medium brown, glabrous, wide as vertex, at least 2x wider than antennal scape (Figs. 11A, B). Antennal scape and antennomeres medium brown (Figs. 11A–D). In lateral view, gena medium brown (Fig. 11C). Three ocelli, almost in line; lateral ocellus smaller than in T. oxossi n. sp., circular; median ocellus small, flat (Figs. 11B–D). Maxillary palpi medium brown; apex rounded, whitish (Fig. 11C). Frons medium brown, very short, shorter than clypeus and labrum (Fig. 11D). Clypeus, labrum and mandibles medium brown (Fig. 11D).

Thorax. DD saddle-shaped, glabrous, wider than long, medium brown; cephalic margin concave, caudal margin convex (Figs. 1C, 11A, B). LL ventro-cephalic angle rounded, ventral margin straight, ventro-caudal angle ascendant (Fig. 11C).

Legs. Legs I, II light brown. Tympanum on both sides of TI. TI with 2 ventral spurs and 1 dorsal (inner). TII with 4 spurs. Legs III not specially elongated, shorter than body length. FIII medium brown, articulation with TIII dark brown. TIII and basitarsus–III medium brown (Fig. 11A). Double row of spines on basitarsus–III (Fig. 11A). TIII with spines before the subapical spurs; subapical spurs 3/3. Apical spurs: median longest on both sides, dorsal slightly shorter, ventral smaller.

Abdomen. Abdomen medium brown, glabrous (Fig. 11A). Sternites medium brown. Cerci light brown.

Male. Male FWs large, reaching tergite 6, medium brown; anal vein area bulged dorsally; harp crossed with 4 almost transverse veins; stridulatory vein with 56–86 teeth (n=3); mirror undivided, distinct from apical venation; apical field very short, almost reduced; lateral field with 4-5 longitudinal veins (Figs. 11A, F, 13B). Metanotum without metanotal structures. Male supra anal plate light brown, with medium brown macula; constricted medially, proximal margin slightly concave, distal margin rounded (Fig. 11F). Subgenital plate medium brown, triangular, proximal margin almost straight, distal margin rounded (Fig. 11G).

Male genitalia. Pseudepiphallus: anterior margin without medial furrow (Figs. 12A); apex of lateral lophi bifurcated, inner margins of distal part touching each other (Fig. 12A); medial lophi wide, rounded, posterior margin concave (Figs. 12A, C). Rami elongated, apically bent towards ventral side; apex of each ramus separated (Figs. 12A–C). Pseudepiphallic parameres not surpassing the apex of lateral lophi, apex pointed (Fig. 12B). Ectophallic invagination: ectophallic apodemes shorter than in T. salgado n. sp. (Figs. 12A, B); ectophallic arc dorsal, thin, almost indistinguishable, below pseudepiphallic medial lophi; ectophallic fold furrowed, longer than in T. salgado n. sp. (Fig. 12B). Endophallus: endophallic sclerite small, related to ectophallic fold (Fig. 12B); endophallic cavity reduced.

Female. Unknown.

Measurements (mm). Males (n=6)– mean (range): BL – 29.17 (26.7–31.65); PL – 4.5 (3.9–4.95); PW – 6.65 (6– 7.2); FWL – 12.17 (10.95–13.95); FWW – 7.2 (6.3–8.7); LFIII – 18.45 (16.65–20.1); WFIII – 5.45 (4.5–6.15); LTIII – 10.47 (9.75–11.4).