Zalarnaca (Zalarnaca) maninjau, 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 : 252-253

Zalarnaca (Zalarnaca) maninjau sp. nov.

Figs. 2I , 93 A–G

Material examined. Holotype (male): Indonesia: West Sumatra, Maninjau , elev. 400–500 m (0°18'S, 100°15'E), in hollow stem, 13–16.iii.1995, leg. S. Ingrisch—(Bonn ZFMK).

Diagnosis. An elongate, long winged species; tegmen with partly subtruncate tip. The new species differs from Z. (Z.) kerinci Gorochov, 2008 from Jambi province by the male subgenital plate that has convex and converging lateral margins and is provided with free styli instead of substraight diverging lateral margins and the styli fused with the subgenital plate. With regard to those characters Z (Z.) maninjau sp. nov. is more similar to Z (Z.) s. simalurensis (Karny, 1931). It differs by the male subgenital plate that has the lateral margins less strongly approaching towards tip and longer free styli than in the latter species. Moreover, the apical projections of the ninth abdominal tergite are stouter at base, not overlapping in middle, and distinctly constricted before upcurved apical tooth. From Z (Z.) separata (Karny, 1926) that is also similar, Z (Z.) maninjau differs by the male subgenital plate that has the apical margin less strongly concave in middle, the styli are longer and although also inserted laterally closer to the hind margin; the projections of the ninth abdominal tergite are longer and inserted closer to each other thus that the space encircled appears longer and narrower, the apical teeth of these projections have the base constricted, then pointing up, become swollen and curved proximad into the acute tips pointing towards body.

Description. Small to medium sized species. Head: Face narrow ovoid; forehead nearly smooth; fastigium verticis about as wide as scapus, hardly wider; separated by a sinuate transverse suture from fastigium frontis; ocelli distinct, white; subocular furrow indistinct ( Fig. 93B ). Abdominal tergites two and three each with two rows of stridulatory pegs (8, 14;>16,>20; n = 1; Fig. 93F ).

Wings reaching to about tip of stretched hind tibiae ( Fig. 93A ). Tip of tegmen partly truncate, only at posterior angle rounded. Tegmen: Radius releases RS only in about apical third; both veins divide once more near tip; media anterior free from base, single-branched; cubitus anterior at base with a single branch that forks into two veins in about basal third, the anterior branch divides again into two branches, MP and CuA1, while the posterior branch (CuA2) does not divide further; cubitus posterior undivided, free throughout; with 3 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 7–9 external and 13 internal spines on ventral margins; hind tibia with spaced spines on both dorsal margins, ventral margins with one pre-apical spine; with 3 apical spurs on both sides ( Fig. 1H , 93G ).

Coloration. General color uniformly brown. Face uniformly yellowish brown. Tegmen semi-transparent yellow, towards margins of lighter color, veins yellow; hind wing semi-transparent white; veins yellow, veinlets light grey.

Male. Eight abdominal tergite with dorsal area prolonged. Ninth abdominal tergite globular but short and strongly down-curved, in apical area with medial furrow, in middle of apical margin with a pair of short processes, each curved first laterad then mediad then suddenly dorsad and proximad, at end black and with acute tip. Tenth abdominal tergite short band-shaped below apical margin of ninth tergite; in middle with a short dorsal process with obtuse tip faintly curved proximad, visible through the cleft between the margin of the ninth tergite and the tips of its apical processes ( Fig. 93 C–E). Epiproct short, narrow with medial furrow; paraproctes forming large plates projecting from base of cerci. Subgenital plate little wider than long, slightly furrowed in midline (artifact), with convex lateral margins, apical margin obtuse angularly excised; styli small and thin, less than one third the length of subgenital plate, inserted at external surface of apical lateral angles of subgenital plate ( Fig. 93D ).

Measurements (1 male).—body w/wings: 28; body w/o wings: 22; pronotum: 3.8; tegmen: 23; tegmen width: 6.5; hind femur: 11.5; antenna: 90 mm.

Figures

FIGURE 1. A, Larnaca (L.) eugenii (Griffini, 1914); B, Eugryllacris trabicauda sp. nov.; C, Ocellarnaca braueri (Griffini, 1911); D, Gryllacris kinabaluensis Griffini, 1915; E, Ultragryllacris triangula sp. nov.; F, Woznessenskia bavi sp. nov.; G, Psilogryllacris sp. (Karny's 1931 "allotype" of "dalbertisi Griffini 1909"); H, Zalarnaca (Zalarnaca) maninjau sp. nov.—Left tegmen with main veins (A–G), apical area of right hind tibia and hind tarsus in oblique lateral view with ventral pre-apical spine marked (H). Abbreviations for veins: C costa, ScA subcosta anterior, ScP subcosta posterior, R radius, RS radius sector, MA media anterior, MP media posterior, CuA cubitus anterior, CuP cubitus posterior, An1 first anal vein, following anal veins unmarked.

FIGURE 2. A, Melaneremus sikkimensis sp. nov. male holotype; B, Papuogryllacris ligata bundi ssp. nov. male holotype; C, Gryllacris signifera signifera (Stoll, 1813); D, Papuogryllacris leeuweni (Karny, 1930) male; E, Eugryllacris serricauda sp. nov. female; F, Capnogryllacris (C.) e. erythrocephala Gorochov, 2003; G, Asarcogryllacris (A.) parapat sp. nov. female holotype; H, Asarcogryllacris (A.) macilenta macilenta (Pictet & Sauss., 1891) female lectotype; I, Zalarnaca (Zalarnaca) maninjau sp. nov. male holotype.—A–B, body and legs ventral view showing the ventral tibial spines (arrows); C–D, habitus lateral view with the ventral tibial spines (black arrow) and the presence (C, also F) or absence (D) of ventral pre-apical spines on hind tibia (blue arrow); E–F, abdominal apex with ovipositor in lateral view, red arrows mark the widened (E) or simple (F) ovipositor apical area, the green arrow marks the lateral furrow of the ovipositor with widened apical area; G, venation of left tegmen; H, venation of right tegmen; I, apical area of right hind tibia and tarsus. Abbreviations of veins as in Fig. 1.

FIGURE 93. Genus Zalarnaca: A–G, Z. (Zalarnaca) maninjau sp. nov. holotype male; H–N, Z. (Glolarnaca) globiceps minor ssp. nov. holotype male.—Habitus dorsal view (A, H), face (B, I), abdominal apex in lateral view (C, J), apical view (K–L), ventro-apical view (D), and ventral view (N), projections of ninth and tenth abdominal tergite (E, M), stridulatory pegs on second and third abdominal tergites, front is left (F), apical area of left hind tibia (G). Scales 10 mm.