Elimaea (Poaefoliana) jacobsoni Karny, 1926

Ingrisch, Sigfrid, 2011, New taxa of Elimaeini (Orthoptera: Tettigoniidae: Phaneropterinae) from South East Asia, Zootaxa 2935, pp. 1-25 : 5-6

Elimaea (Poaefoliana) jacobsoni Karny, 1926 comb. n.

Figs. 2 L–M, 3A, 4P–Q, 5D, 6K–L

Elimaea ( Elimaea , poaefolia -Gruppe) jacobsoni Karny 1926 , Treubia 9: 23, 86

Elimaea ( Elimaea , poaefolia -group) jacobsoni Ingrisch 1998 , Tijdschr. v. Entomol. 141: 70

Holotype (male): Indonesia: West Sumatra, Fort de Kock [Bukittinggi], [0°15'S, 100°23'E], 920 m, 1.i.– 31.xii.1924, leg. E. Jacobson ( RMNH).

Material studied: 1 male, Indonesia: Sumatra, " Elimaea sp.n. vicina: roseae Br.", " Type Brunn." ( MHNG).

Diagnosis. The species is unique for the stridulatory area with acute process on the left and rounded process on the right tegmen, and for the short male cerci with the huge compressed towards apex acute apical tooth.

Description. Fastigium verticis slightly declining and constricted in circa middle of length, anterior half narrow, shallowly furrowed on dorsal surface; step-like descending to fastigium frontis. Pronotum long and narrow, posterior margin rounded; paranota nearly twice as long as high, ventral margin slightly convex, humeral sinus distinct.

Male. Stridulatory area of left tegmen with inner margin angularly projecting ( Fig. 2 L), on right tegmen roundly projecting forming a small "secondary mirror"; mirror proper nearly circular ( Fig. 2 M). Stridulatory file on underside of left tegmen sinuate, carrying 39–45 teeth: about 18–19 teeth from base medium sized, thereafter becoming gradually narrower and smaller towards apex ( Fig. 3 A). Cerci short, curved, at apex with a large, compressed, at tip acute tooth ( Fig. 4 P–Q). Subgenital plate with basal quarter rather wide, thereafter strongly narrowed into a long process that is narrowing to behind middle and moderately widening again towards apex; less than apical quarter divided into two lobes with finely spinulose internal margins ( Fig. 5 D). Phallus with a pair of conchate semi-hyaline sclerites with stiffened, brown, denticulate margin ( Fig. 6 K–L).

Female unknown.

Measurements (1 male). Body w/o wings: 20; pronotum: 4.7; tegmen: 29; tegmen width: 3.3; hind femur: 22 mm (after Karny 1926a).

Etymology. Named for the white stridulatory area of male tegmen.

Figures

FIGURE 2. Stridulatory area of left (A – C, E, G, I, J, L) and right (D, F, H, K, M) male tegmen of Elimaea (Poaefoliana) species: A, E. poaefolia (De Haan, 1842) [specimen 19206 in NHMW]; B – D, E. rosea Brunner, 1878 [B, lectotype; C – D, male from Poring]; E – F, E. kutu sp. n. holotype; G – I, E. jitra sp. n. holotype; J – K, E. albimaculata sp. n. holotype; L – M, E. jacobsoni Karny, 1926 holotype. Abbreviations: mi, mirror; sv, stridulatory vein.

FIGURE 3. Male stridulatory file on underside of left tegmen of Elimaea (Poaefoliana) species: A, E. jacobsoni Karny, 1926 holotype; B – C, E. poaefolia (De Haan, 1842) [B, specimen 19206 in NHMW; C, paralectotype of E. rosea in SMTD]; D, E. albimaculata sp. n. holotype; E – F, E. rosea Brunner, 1878 [E, lectotype; F, male from Poring]; G, E. jitra sp. n. holotype; H, E. kutu sp. n. holotype. Figs B and E by C. Hemp.

FIGURE 4. Male cercus of Elimaea (Poaefoliana) species in roughly dorsal view (A, B, F, H, J, L, N, P); apex of cercus in roughly posterior view (C – E, G, I, K, M, O, Q). A – E, E. poaefolia (De Haan, 1842) [A, D, male syntype; B – C, paralectotype of E. rosea in SMTD; E, specimen 19206 in NHMW]; F – I, E. rosea Brunner, 1878 [F – G, lectotype; H – I, male from Poring]; J – K, E. albimaculata sp. n. holotype; L – M, E. kutu sp. n. holotype; N – O, E. jitra sp. n. holotype; P – Q, E. jacobsoni Karny, 1926 holotype.

FIGURE 5. Male subgenital plate of Elimaea (Poaefoliana) species in ventral view (A – D, F, H, K, M); do. in lateral view (E, I, L, N); do. apex of subgenital plate in lateral view (G, J). A – C, E. poaefolia (De Haan, 1842) [A, male syntype; B, paralectotype of E. rosea in SMTD; C, specimen 19206 in NHMW]; D, E. jacobsoni Karny, 1926 holotype; E – G, E. rosea Brunner, 1878 [E, lectotype; F – G, male from Poring]; H – J, E. albimaculata sp. n. holotype; K – L, E. jitra sp. n. holotype; M – N, E. kutu sp. n. holotype. Abbreviations: e, epiproct; ce, cercus; ps, phallus sclerite; sg, subgenital plate.

FIGURE 6. Male phallus sclerites of Elimaea (Poaefoliana) species in about dorsal view (A, C, H – J, L); do. in oblique lateral view (B, D – G, K). A – F, E. poaefolia (De Haan, 1842) [A – B, male syntype; C – E, paralectotype of E. rosea in SMTD; F, specimen 19206 in NHMW]; G, E. rosea Brunner, 1878 lectotype; H – J, E. albimaculata sp. n. holotype; K – L, E. jacobsoni Karny, 1926 holotype.