Liara (Indoliara) dividata, 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

Liara (Indoliara) dividata sp. nov. Fig. 5

Holotype

(male). India: South India, Thekkadi, Periyar Dam (9°35'N, 77°9'E), 6.-10.v.1937, coll. B.M.-C.M. Expedition to South India - depository: BMNH (Lo032S001; B.M.1939-205).

Paratype

(1 female). India: South India, Travancore, Pirmed (9°40'N, 76°59'E), elev. 1036 m, 4.-6.v.1933, coll. B.M.-C.M. Expedition to South India - BMNH (Lo032S002; B.M.1939-205).

Etymology.

The name of the new species refers to the shape of the fastigium verticis that is divided into two short apical cones; from Latin dividere to divide.

Diagnosis.

This is the so far only species in the subgenus. Its differences to the species of the other subgenera of Liara are discussed above under Indoliara subgen. nov.

Description.

Fastigium verticis longer than scapus, with a minute tubercle at top; apex bifurcate and slightly S-shaped, separated from fastigium frontis by a shallow furrow, but connected in middle by a lamella (Fig. 5I ). Frons rugose (Fig. 5B ). Pronotum rugose, funnel-shaped; anterior margin broadly rounded but slightly concave in middle; posterior margin truncate or nearly so; first and second transverse sulci interrupted on disc; shoulders little marked; paranota with anterior and posterior angles rounded; ventral margin very little sinuate, almost straight; tympanal swelling weak but well delimitated; humeral sinus distinct. Prosternum mute; meso- and metasternal lobes conical, short; intermedial plate with small spines at posterior angles (Fig. 5J ). Tegmen covering abdomen, regularly narrowing from basal widening to rounded tip (Fig. 5A, H ). Femora with the following number of spines on ventral margins: profemur no external, 5-8 internal; mesofemur 6-9 external, no internal; postfemur 10-11 external, no internal; all with irregularly alternating large and minute spines. Knee lobes of profemur obtuse on external, triangular on internal side; of mesofemur obtuse or triangular on external, spinose on internal side; of postfemur spinose on both sides.

Male. Tenth abdominal tergite with short triangular projections above bases of styli; apical margin broadly concave in between. Epiproct wide with rounded lateral lobes [apex hidden]. Paraprocts with compressed, conical projections. Cerci conical, compressed, apex rounded; dorso-external surface concave; ventro-internal surface convex in apical half, with a broad, oblique, transverse furrow in basal half; with an acute spinule behind furrow and a thin process at very base; process conical at base, rectangularly bent dorsad in about middle, strongly compressed thereafter, apex with acute tooth on proximal side (Fig. 5D ). Subgenital plate with lateral areas strongly curved dorsad; lateral margins almost straight, approaching each other posteriorly; apex broadly truncate with strong and dense hairs, hairs also on dorsal (= internal) surface in middle of apical area. Styli long, longer than half the length of the subgenital plate, unsymmetrical (Fig. 5G ). Titillators separate; rather thin; bases widened and flat, gradually narrowing and approaching to just before apical area; apical area stretched, ovoid, curved laterad, with granular surface (Fig. 5E, F ).

Female. Tenth abdominal tergite with apical margin concave in middle. Epiproct triangular, with shallow dorsal groove. Cerci conical, apex slightly curved mediad. Subgenital plate wider than long, roughly triangular with apex roundly excised. Ovipositor compressed blade-shaped, highest in middle.

Coloration.

Uniformly light brown (ochre). Frons reddish brown in male; labrum yellow, mandibles black. Tegmen speckled with small brown spots (Fig. 5A, H ). Variation: Frons concolorous. Hind area of vertex and anterior area of pronotum with faint brown medial band split by narrow light line. Spines on hind femur and tibia contrasting black.

Measurements.

Body w/wings: male 36, female 42; body w/o wings: male 36, female 44; pronotum: male 7.5, female 9.5; tegmen: male 25, female 26.5; hind femur: male 16, female 19.5; ovipositor: female 28 mm long, greatest height 3.2 mm.

Figures

Figure 5. Liara (Indoliara) dividata sp. nov. A-G male holotype: A habitus dorsal view; B face; C stridulatory file; D abdominal apex with cerci in ventro-apical view; E titillators of male phallus; F tip of titillators; G subgenital plate. - H-K female: H habitus lateral view; I head in dorsal view; J thoracic sternites; K subgenital plate.