Pseudosubria assamensis, Ingrisch, 2020

Ingrisch, Sigfrid, 2020, New subgenera and species of Agraeciini (Orthoptera, Tettigoniidae, Conocephalinae) from South Asia found in historical insect collections, Evolutionary Systematics 4 (2), pp. 119-132 : 119

Pseudosubria assamensis sp. nov. Fig. 6

Holotype

(male). India: Assam, Imphal (24°51'N, 93°54'E), 22.iii.1946, coll. T.J. Lawrence - depository: BMNH (Lo037S001, B.M.1946-228).

Paratype

(1 female). India: Assam, Imphal, 15.iii.1946, coll. T.J. Lawrence - depository: BMNH (Lo037S002, B.M.1946-228).

Etymology.

The name of the new species refers to the type locality.

Diagnosis.

The shape of the male cerci is similar to that in P. bispinosa obtusa Ingrisch, 1998 but has the ventral branch very narrow, regularly upcurved throughout instead of substraight behind the basal bent and reaches the top of the cercus stem (Fig. 6K-L ). The titillators have a rather long fused central area, also as in P. b. obtusa , but the free arms are narrower than in the latter species (Fig. 6M ). The female differs from that of the other species by the shape of the ovipositor that is only little dorso-ventrally widened around mid-length and by the shape of the subgenital plate that is split to the base allowing the base of the ovipositor to project between the lateral lobes (Fig. 6D ).

Description.

A rather small, slender species. Fastigium verticis conical, obtuse, with a dorsal furrow: separated by a concavity and a narrow seam from fastigium frontis. Frons shining with impressed dots, nearly subrugose. Tegmen reaching or little surpassing apex of stretched hind tibiae. Femora with the following number of spines on ventral margins: profemur 1-3 external, 2-3 internal; mesofemur 3-4 external, no internal; postfemur 5-7 external, no internal. Knee lobes of fore femur obtuse on both sides, on mid femur obtuse on external, acute on internal side, of hind femur obtuse on external, short spinose on internal side.

Male. Tenth abdominal tergite prolonged; apical margin in lateral areas nearly straight but converging from both sides; in middle obtuse-angularly excised; with a weak medial carina. Epiproct triangularly rounded with deep medial furrow. Paraprocts with a faint swelling on internal side. Cerci short; external surface convex, at dorso-internal margin with a small triangular expansion; at apex with a large triangular internal expansion covering apex of internal side as a cap; in apical third at ventro-medial margin with a long curved stylate projection curved dorsad behind apex of cercus and narrowing towards apex; internal surface flattened, with a weak fold. Subgenital plate long and narrow; with a medial carina fading towards apex; apical margin slightly concave; styli thin. Titillators X-shaped, fused in middle with basal branches longer than apical branches, for the greatest part hyaline; apex of apical branches darkened, separated by a narrow membranous zone from a dentate apical cap.

Female. Epiproct triangular with medial furrow. Cerci conical with a long styliform apex. Subgenital plate split to base into two conical, cap-like, lateral lobes with obtuse tip that in situ lie in wide emarginations of the base of the ventral ovipositor valves.

Coloration.

Ochre. Head and pronotum with a dark brown medial band.

Measurements.

Body w/wings: male 37.5, female 37.5; body w/o wings: male 21, female 19.5; pronotum: male 5.8, female 5.6; tegmen: male 31.3, female 31; hind femur: male 12.5, female 12.5; antenna: female 50; ovipositor: female 12 mm.

Figures

Figure 6. Pseudosubria assamensis sp. nov. A-E female: A habitus lateral view; B head and pronotum; C ovipositor; D, E subgenital plate in ventral (D) and lateral view (E). - F-N male holotype: F left tegmen; G stridulatory file; H base of left tegmen; I mirror of right tegmen; J subgenital plate in lateral view; K, L cercus in external (K) and internal (L) view; M, N phallus with titillators. Abbeviations: 7 seventh sternite, m membrane, ov base of ovipositor, sg lateral lobes of subgenital plate.