Larnaca (Larnaca) subaptera, 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 : 209

Larnaca (Larnaca) subaptera sp. nov.

Figs. 71 L–N, 72I–L

Material examined. Holotype (male): Indonesia: East Java, Tretes, Gunung Arjuna , elev. 800–1000 m (7°43'S, 112°36'E), 26.iii.1995, leg. S. Ingrisch—(Bonn ZFMK).

Diagnosis. The new species is similar to L. jacobsoni ( Griffini, 1913c) from the Tengger Mountains in East Java. It differs by the proportions of the body: greater body length but shorter pronotum and hind femora, and by the shape of the male abdominal apex. The ninth abdominal tergite is provided with a pair of semi-globular swellings that are distinctly separated from each other while in L. jacobsoni , after the descriptions and figures in Griffini (1913c) and Karny (1929d, 1931b) are almost touching each other in midline. Moreover these lobes are at ventro-internal angle prolonged into compressed conical projections with subobtuse tip in L. subaptera sp. nov. but unfortunately neither mentioned nor drawn by Griffini (1913c) or Karny (1929d, 1931b). The male subgenital plate is obviously longer in L. subaptera and the laterally inserted styli are only hardly surpassing the tip of the truncate subgenital plate while they are distinctly surpassing the subgenital plate in L. jacobsoni .

Description. Small, subapterous species ( Figs. 71 L–M). Head: Face robust but not particularly large; in frontal view roughly oval; forehead nearly smooth; fastigium verticis much wider than scapus; ocelli indistinct ( Fig. 71N ). Abdominal tergites two and three each with two rows of stridulatory pegs (8–9, 14; 16, 23–24; n = 1 male; Fig. 72L ). Wings reduced to minute scales; tegmen and hind wing visible pointing ventrad as in adults not dorsad as in nymphs.

Legs: Fore coxa with large 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 8–9 external and 13 internal spines on ventral margins, increasing in size towards posterior end; 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 brown; head and posterior abdominal tergites medium brown, thoracic and anterior abdominal tergites blackish brown, pro-, meso- and metanotum with light brown medial band or spot; sternites light brown; legs light brown, genicular areas of femora and tibiae dark brown. Face medium reddish brown, compound eyes dark brown.

Male. Eighth abdominal tergite prolonged, at least twice as long as preceding tergites. Ninth abdominal tergite curved down and furrowed in midline except in basal area, in apical area forming a pair of semi-globes that are extended on inner ventral margin into a short swollen projection that carries at tip on ventral margin a compressed, elongate triangular spine; in situ spines from both sides crossing each other ( Figs. 72 I–J). Tenth abdominal tergite narrow. Paraproctes forming large plates mediad of bases of cerci. Subgenital plate ventral surface convex, in apical third with converging lateral margins; apical margin truncate; styli small, arising laterally at about base of apical third and little surpassing tip of plate ( Fig. 72K ).

Female unknown.

Measurements (1 male).—body w/o wings: 17; pronotum: 3.3; tegmen: 0.7; hind femur: 7.5 mm.

Figures

FIGURE 71. Genus Larnaca: A–C, L. nigricornis sp. nov. male holotype (A–B) and paratype (C); D–G, L. eugenii (Griffini, 1914) male holotype (D–E) and male from Tay Yen Tu (F–G); H–I, L. tenuis sp. nov. female holotype; J–K, L. samkos sp. nov. female holotype; L–N, L. subaptera sp. nov. male holotype; O–P, L. squamiptera sp. nov. female holotype; Q, L. larnacoides (Karny, 1937) female in Karny collection (not a type).—Habitus dorsal view (A, D, F, H, K, L, O), do. lateral view (M, Q), face (B–C, E, G, I–J, N, P).—Scales 10 mm (habitus), 5 mm (face), not all images to scale.

FIGURE 72. Genus Larnaca: A–D, L. nigricornis sp. nov. male holotype (A–B) and paratype (C–D); E–H, L. eugenii (Griffini, 1914) holotype (E) and male from Tay Yen Tu (F–H); I–L, L. subaptera sp. nov. holotype.—Male abdominal apex in dorso-apical and apical view (A–G, I), ventral view (H, K) and oblique lateral view (J), stridulatory pegs on second and third abdominal tergites, front is right (L).