Eugryllacris crassicauda cambodiana, Ingrisch, 2018

Ingrisch, Sigfrid, 2018, New taxa and records of Gryllacrididae (Orthoptera, Stenopelmatoidea) from South East Asia and New Guinea with a key to the genera, Zootaxa 4510 (1), pp. 1-278 : 35-36

Eugryllacris crassicauda cambodiana ssp. nov .

Figs. 4H , 5D , 7 C–D, 9F

Material examined. Holotype (female): Cambodia: Phnom Penh (11°33'0''N 104°55'0''E), 1.xi.–31.xii.1992, leg. dt. Blauhelm Sanitäter Kontingent— 1 female (ex coll. Böhme, Bonn ZFMK).

Diagnosis. The new subspecies is very similar to the nominate subspecies with regard to general habitus, size, length of ovipositor and shapes of female seventh abdominal sternite and subgenital plate. However the seventh sternite appears narrower and less upcurved, it narrows almost triangularly from base to about mid-length and then faintly widens towards tip ( Figs. 7 C–D), while in E. c. crassicauda the basal area appears wider with convex margins and the apical area is slightly wider, parallel-sided and more strongly upcurved.

Description. Medium sized species, rather small for the genus ( Fig. 4H ). Head: Face ovoid; forehead with fine transverse riffles and few scattered impressed dots; fastigium verticis about one and a half time as wide as scapus; ocelli visible but not very conspicuous; fastigium frontis separated from fastigium verticis by a very fine suture; a pair of weak sub-antennal furrows, starting at the internal angle of the antennal scrobae, separates the central area of face from lateral areas and fuse ventrally with the clypeo-frontal suture, clypeo-frontal suture interrupted in middle; subocular furrows present, sinuate ( Fig. 5D ).

Wings surpassing hind knees ( Fig. 4H ). Tegmen: Radius releases RS before mid-length of tegmen, both forked in apical area; media anterior fused in about basal third with radius; cubitus anterior and cubitus posterior both undivided, single branched; with 5 anal veins.

Legs: Fore coxa with a spine at fore margin; fore and mid femora unarmed; fore and mid tibiae with four pairs of large ventral spines and one pair of smaller ventral spurs; hind femur with 5–7 external and 5–6 internal spines on ventral margins; hind tibia with spaced spines on both dorsal margins, ventral margins with one pre-apical spine each; with 3 apical spurs on both sides.

Coloration. General color light brown (discolored due to former storage in alcohol). Face unicolored yellowish white. Tegmen semi-transparent, yellowish in middle and towards base, veins of same color; hind wing semitransparent white; veins and veinlets light grey or brown; fields between veinlets with dark brown spots.

Male unknown.

Female. Seventh abdominal sternite with about basal half roughly triangular in ventral view; apical half forming a long and stout process with slightly diverging lateral margins and faintly convex apical margin, in lateral view apex slightly recurved towards body; the process fills in situ a large groove of the subgenital plate ( Figs. 7 C– D). Subgenital plate in lateral view strongly curved in subbasal area; in ventral view subgenital plate behind curvature about semi-oval with faintly bilobate tip, surface with a large groove, leaving only margins elevated. Base of ovipositor with a bent basal sclerite. Ovipositor very long, in subbasal area curved, afterwards only faintly curved, almost straight with converging margins and longitudinal furrow ending before apical widening; before tip dorsal margin with a slight expansion ( Fig. 9F ).

Measurements (1 female).—body w/wings: 33; body w/o wings: 22; pronotum: 6.5; tegmen: 24.5; tegmen width: 9.5; hind femur: 14.5; antenna: 90; ovipositor: 26.5 mm.

Etymology. Named after the subspecies distribution.

Figures

FIGURE 4. Genus Eugryllacris: Habitus dorsal view: A–B, E. trabicauda sp. nov. female holotype (A) and male paratype (B); C–D, E. vermicauda sp. nov. female holotype (C) male paratype (D); E, E. serricauda sp. nov. male holotype; F, E. guomashan sp. nov. female holotype; G, E. crassicauda sp. nov. female paratype; H, E. crassicauda cambodiana ssp. nov. female holotype; I, E. malaccensis (Griffini, 1908) male; J, E. serricauda sp. nov. female paratype. Scales 10 mm.

FIGURE 5. Genus Eugryllacris: A, E. gandaki sp. nov. female holotype; B, E. serricauda sp. nov. male holotype; C, E. crassicauda sp. nov. female paratype; D, E. crassicauda cambodiana sp. nov. female holotype; E, E. sulcata sp. nov. female holotype; F, E. malaccensis (Griffini, 1908) male; G, E. vermicauda sp. nov. female holotype; H, E. trabicauda sp. nov. female holotype; I, E. inversa sp. nov. male holotype; J, E. guomashan sp. nov. female holotype; K, E. sulcata sp. nov. female holotype.—Face (A–J), habitus dorsal view (K). Scales 5 mm (face); 10 mm (habitus).—Abbreviations: as antennal scrobus, cf clypeo-frontal suture, cl clypeus, e compound eye, ff fastigium frontis with median ocellus, fv fastigium verticis, la labrum, lo lateral ocellus, lp labial palpus, ma mandible, mo median ocellus, mp maxillary palpus, sa sub-antennal furrow, so subocular furrow, sc scapus. The arrow in H points at the spine at anterior coxa.

FIGURE 7. Genus Eugryllacris: A–B, E. gandaki sp. nov. holotype; C–D, E. crassicauda cambodiana sp. nov. holotype; E, E. serricauda sp. nov. paratype; F–G, E. crassicauda sp. nov. holotype; H, E. inversa sp. nov. paratype; I–J, E. poultoniana (Griffini, 1909).—Apical area of female abdomen with seventh abdominal sternite, subgenital plate and base of ovipositor in lateral (A, C, F, J) and ventral view (B, D–E, G–I). Scale for line drawings 5 mm. Abbreviations: 7th seventh abdominal sternite, sg subgenital plate.

FIGURE 9. Genus Eugryllacris: A, E. inversa sp. nov. male holotype; B, E. maculipennis (Stål, 1877) det. Brunner female; C, E. maculipennis specularis (Karny, 1925) female type; D, E. gandaki sp. nov. female holotype; E, E. malaccensis (Griffini, 1908) male; F, E. crassicauda cambodiana ssp. nov. holotype; G, E. vermicauda sp. nov. holotype; H, E. inversa sp. nov. paratype; I, E. gandaki sp. nov.; J, E. sulcata sp. nov. holotype; K, E. crassicauda sp. nov. paratype; L, E. serricauda sp. nov. paratype; M, E. guomashan sp. nov. holotype; N, E. poultoniana (Griffini, 1909); O, E. trabicauda sp. nov. holotype.— Habitus in dorsal view (A–E) and lateral view (F), ovipositor (G–O). Scales 10 mm; images of ovipositor adapted to scale at bottom.