Insara acutitegmina Fontana, Buzzetti, Mariño-Pérez and García-García

Fontana, Paolo, Buzzetti, Filippo Maria, Mariño-Pérez, Ricardo & García-García, Patricia Lucero, 2011, Three new species of Tettigoniidae from Mexico (Orthoptera: Tettigoniidae; Phaneropterinae; Insarini and Odonturini), Zootaxa 2879, pp. 22-32 : 23-27

Insara acutitegmina Fontana, Buzzetti, Mariño-Pérez and García-García

Figs. 1–13 , 31 , 44

Diagnosis. Male with short tegmina, about half than hind femur length, narrow with rounded apex. Male cerci subconical, straight, incrassate with small apical tooth.

Male description (based on male Holotype and two paratypes): Fastigium of vertex ( Figs. 1–4 ) narrow, laterally compressed, subhorizontal, with a decided medio-longitudinal sulcation in anterior portion, sides diverging posteriorly; fastigium of vertex in contact with facial fastigium, both anteriorly flat. Antennae filiform, very long, subcrassate proximad, with 2nd antennal joint long more than half of 1st joint. Pronotum ( Figs. 1–2 ) constricted in the meso-cephalic portion; dorsum flat, with distinct lateral carinae; posterior margin wider than anterior one, gently convex and a little incised in the middle; lateral lobes angularly inserted to disc, caudal margin of lobes sinuate and humeral sinus marked. Tegmina ( Figs. 10–13 , 31 ) abbreviate, about half than hind femur length, narrow, apically rounded. Wings present, shorter than tegmina. Abdomen dilated; abdominal segments dorsally angulated in the middle ( Figs. 6 , 12 ); last abdominal tergite depressed in the middle ( Fig. 5 ). Epiproct ( Fig. 5 ) elongate, scutiform, with convex sides and subacute apex. Cerci ( Figs. 5–8 ) subconical, straight, incrassate, with small apical tooth directed meso-dorsal. Subgenital plate ( Fig. 9 ) subtrapezoidal, produced in articulate styliform appendages; distal margin between these appendages broadly sinuate-truncate. Cephalic and median femora apically carinate dorsally, genicular lobes produced, unispinose; genicular spines with rounded apex. Cephalic tibiae with proximal extremity much swollen, narrowing below tympanum that is open on both faces.

Colour. Two colour forms, brown and green ( Figs. 12, 13 , 31 ). Brown form: general body colour brown; dorsum of pronotum whitish with dark lateral spots at cephalic and caudal margins; post-ocular vanishing dark bands. First abdominal tergite with two dorsolateral subrectangular dark spots; second and fourth abdominal tergites with median blackish band; fifth abdominal tergite with two lateral subtriangular dark spots. Tegmina brown with darker spots. Green form: general colour light green, dark spots and bands more or less as in brown form, but less defined or absent.

Female: unknown

Male measurements. Body length 25.3–26.9 (26.92*; 26.35; 0.84); pronotum length 2.8–3.0 (2.8*; 2.86; 0.11); lateral lobe height 2.0–2.4 (2.4*; 2.16; 0.21); hind femur length 19.2–20.1 (19.23*; 19.63; 0.47); tegmen length 9.9–10.17 (10.15*; 10.07; 0.15) and tegmen width 1.67–1.7 (1.69*; 1.68; 0,015).

Type material. Male holotype, Mexico, Chiapas. 1.5 km SE San Cristóbal de las Casas, Carr. 190, 2325 m, (16°37’51’’ N; 92°31’59’’W), 13.XII.2006, leg. P. García-García & P. Fontana; same data, 1 male paratype; Mexico, Chiapas. Carr. 190, 20 km W of desv. Chincultik (La Trinitaria), 1557 m, (16°08’24’’ N; 91°57’00’’W), 14.XII.2006, Coll. P. García-García & P. Fontana, 1 male paratype.

Type depository. Male Holotype, CNIN; 1 male paratype, CPF; 1 male paratype, CFMB.

Etymology. The species is named after the morphology of male tegmina, very narrow and acutely ending.

Remarks. Insara acutitegmina n. sp., known only from Chiapas, Mexico (fig. 44), lives in undergrowth (brown morphs) as well in grass habitats (green morphs).

Insara oaxacae Fontana, Buzzetti, Mariño-Pérez and García-García Figs. 14–30 , 32 , 44

Diagnosis. Fastigium of vertex in both sexes (less evidently in female) with dorsal surface on three distinct levels; tegmina short, about 3/4 than hind femur length, wide, with rounded apex. Male cerci subconical, upcurved apically, with large apical tooth.

Male. Holotype: Fastigium of vertex ( Fig. 15 , 23, 24 ) with dorsal surface on three distinct levels, with a decided medio-longitudinal sulcation in anterior portion, with sides diverging posteriorly, fastigium of vertex in contact with facial fastigium, both anteriorly flat. Antennae filiform, very long, subcrassate proximal, with 2nd antennal joint long more than half of 1st joint. Pronotum ( Figs. 14–15 ) constricted in the meso-cephalic portion, dorsum flat, with distinct lateral carinae in the cephalic portion; posterior margin wider than anterior, convex and a little incised in the middle; lateral lobes angularly inserted to disc with caudal margin arcuate and humeral sinus distinct. Tegmina ( Fig. 27 ) abbreviate, about 3/4 than hind femur length, wide, apically rounded. Wings present, a little longer than tegmina. Abdomen dilated; abdominal tergites medially acutely angulated; last tergite with a pronounced and extensive depression in the middle. Epiproct ( Fig. 18 ) scutiform, with convex sides and subacute apex. Cerci ( Figs. 18–21 ) subconical, apically flattened dorsoventrally and upcurved, apex with a robust tooth directed dorsad. Subgenital plate ( Fig. 22 ) subtrapezoidal, produced in very reduced articulate styliform appendages, distal margin between these appendages widely emarginated. Cephalic and median femora apically dorsally carinate; genicular lobes produced, unispinose or bispinose; genicular spines with rounded apex if unispinose, optionally with second spine smaller and acute. Cephalic tibiae with proximal extremity much swollen, narrowing below tympanum which is open on both faces.

Female: General characters as in male. Tegmina ( Fig. 28 ) abbreviate, about half the hind femur length, wide, apically rounded. Wings present. Ovipositor ( Fig. 29 ) sharply curved upward at base, apically roundly acuminate; dorsal margin and distal portion of ventral margin finely serrate. Subgenital plate of female elongate, scutiform, with apex angulate-emarginated; with a medio-longitudinal sulcus basally.

Colour. General colour ( Fig. 32 ) brown, with sparse dark spots. 7th abdominal tergite ( Fig. 30 ) with 2 dorsolateral black spots. Tegmina ( Fig. 27, 28 ) with dark dots on tegmina margin in both sexes.

Male holotype measurements. Body length 29.3; pronotum length 3.3; lateral lobe length 2.4; hind femur length 21.5; tegmen length 15.3 and tegmen width 4.0.

Female measurements. Body length 28.6; pronotum length 3.2; lateral lobe length 2.4; hind femur length 20,1; tegmen length 12.0 and tegmen width 3.7.

Type material. Male Holotype, Mexico, Oaxaca. San Juan Tonaltepec, 1741 m, (17°34’02’’ N; 96°56’46’’W), 26.IX.2009, leg. I. Castellanos-Vargas; female, Oaxaca. San José del Pacífico, 2325 m, (16°10’12’’ N; 96°29’24’’W), 29.IV.2008, leg. F.M. Buzzetti.

Type depository. Male Holotype and female, CNIN.

Etymology. The species is named after its known distribution, actually restricted to Oaxaca state in Mexico.

Remarks. Insara oaxacae n. sp. shares some characters with Brachyinsara Rehn & Hebard, 1914 , in particular the shape of the fastigium. To date Brachyinsara includes only two described species, B. magdalenae Rehn & Hebard, 1914 (from Magdalena island in Baja California, Mexico) and B. hemiptera Hebard, 1939 (from California, San Diego County, U.S.A.). The peculiar characters of these two species preclude assignment of our new species to Brachyinsara , although the generic classification of the Insarini is quite complex and needs a major revision. Hopefully, this description will be of some value to future workers studying this group. Insara oaxacae n. sp. is presently known only from two localities in Oaxaca ( Fig. 44 ).

Figures

FIGURE 44. Distribution map of Insara oaxacae n. sp. (black squares), Insara acutitegmina n. sp. (red circles), Arachnitus filicrus Hebard, 1932 (discontinued line) and Arachnitus apterus n. sp. (blue triangles).

FIGURES 1 – 6. Insara acutitegmina n. sp. male Holotype. Head and pronotum dorsal and left lateral view (1, 2); fastigium of vertex dorsal and left lateral view (3, 4); male terminalia dorsal and left lateral view (5, 6).

FIGURES 7 – 13. Insara acutitegmina n. sp.. Right cercus dorsal and right lateral view (7, 8); fastigium of vertex dorsal and left lateral view (3, 4); male terminalia dorsal and left lateral view (5, 6); male subgenital plate ventral view (9); male right opened tegmina dorsal view (10); male Holotype abdomen dorsal pattern (11); green colour form male paratype left lateral view (12); brown colour form male paratypes left lateral view (13).

FIGURES 31 – 32. Insara acutitegmina n. sp. green form male paratype (31); Insara oaxacae n. sp. female (32).

FIGURES 14 – 19. Insara oaxacae n. sp. male Holotype pronotum dorsal view and head and pronotum left lateral view (14, 15); female pronotum dorsal view and head and pronotum left lateral view (14, 15); male Holotype terminalia dorsal and left lateral view (18, 19).

FIGURES 20 – 26. Insara oaxacae n. sp. male Holotype right cercus dorsal and right lateral view (20, 21); Male Holotype subgenital plate ventral view (22); male Holotype fastigium of vertex dorsal and left lateral view (23, 24); female, fastigium of vertex dorsal and left lateral view (25, 26).

FIGURES 27 – 30. Insara oaxacae n. sp. male Holotype right opened tegmina dorsal view (27); female right tegmen, dorsal view (28); female abdomen apex left lateral view (29); female abdomen apex and dorsal pattern (30).