Philmontis pumilus Ingrisch 2022, sp. nov.
Creators: name: Ingrisch, Sigfrid
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Orthoptera
Tettigoniidae
Philmontis
Philmontis pumilus

description: Philmontis pumilus sp. nov.
Figs. 1H, 3D–E, 4K, 5I, 6M, 8L–M
Holotype (male): Papua New Guinea: New Guinea (NE), Upper Biaru River, elev. 1600–2200 m (8°15’S, 146°37’E), 10.iii.1971, leg. Gressitt & Tawi —depository: Bernice B. Bishop Museum, Honolulu (BPBM).
Other specimens studied: same data as holotype— 5 females, 6 males (BPBM).
Diagnosis. The new species, P. pumilus sp. nov., differs from other small, brachypterous species of the genus by the shape of the male cerci that have a large area of the internal surface concavely impressed while this area has only a smaller area slightly impressed in P. pandus sp. nov. or is not impressed in P. robustus sp. nov. Moreover, in P. pumilus, the apical extension of the cercus is only little curved mediad as in P. minimus but strongly curved or bent in P. pandus and P. robustus. The shape and insertion position of the internal projection of the male cercus differs from the situation in all of the other three species (compare Figs 3D–E with Figs 3H–L).
Description. Small species with wings covering little more than half of abdomen (Fig. 1H). Face of uniform color, antennal scrobae and basal segments of antennae darkened or of general color. Pronotum elongate, disc with anterior margin faintly concave, posterior margin broadly rounded; lateral lobes long and narrow, its deepest point in males just before mid-length, in females about at beginning of apical third; auditory swelling distinct; without humeral sinus. Prosternal spines absent or with a pair of minute spinules; mesosternal lobes obtuse; metasternal lobes rounded. Femora with the following number of spines on ventral margins: (1) 2-5 / 1-5 in some specimens hardly visible; (2) 3-6 / 0-3; (3) 4-6 / 0 (n = 12); hind knee lobes unispinose.
Male. Stridulatory file (Fig. 4K): total length 1.0 mm; area with countable teeth 0.84 mm with 42 countable teeth; from base to end of distinct area 0.8 mm with 39 teeth; area with distinctly spaced, including largest teeth 0.66 mm with 30 teeth (n = 1). Tenth abdominal tergite markedly wider than long, apical margin wide-roundly excised for about half the length of the tergite. Cerci with rounded dorso-external and excavated ventro-internal surface; in about apical half narrowing from ventral margin and giving rise to a narrow, rounded and little curved internal process that is compressed at end and terminates into an oblique apical margin with a minute spinule at dorso-distal angle, while tip of cercus stem gives rise to a narrow, oblique, compressed process with a small acute spine at tip (Fig. 3D–E). Subgenital plate in more than basal half bowl-shaped with upcurved and roundly extended lateral areas; from base triangularly excised in middle and this area membranous, afterward ventral disc in middle with a fine carinula; lateral margins roundly swollen and little upcurved, largely surpassing concave apical margin of central disc, at tip carrying a narrow stylus each. Titillators flattened, in situ folded; in opened view with basal and apical areas directed laterad; basal areas widened with concave dorsal and convex ventral margin, narrowing toward tip; apical areas moderately widened, before end narrowed and provided at end with a sclerotized disc with very finely serrulate rim; color brownish with scattered pale brown spots (Fig. 5I).
Female. Pronotum less prolonged than in male with ventral angle in posterior half of pronotum. Subgenital plate with little converging, markedly swollen and upcurved lateral margins that terminate into curved spine-like projections; apical margin of plate between these projections convex, in middle longer than on both sides; basal area of plate with medial keel and cross-barred surface; at very base with lateral dorsal projections that are angularly curved in about mid-length and terminate into auricular structures with grooved surface and bulging margin (Figs 8L–M). Ovipositor moderately long, stout at base, regularly upcurved from basal area to acute tip.
Measurements (7 males, 5 females).—Body w/o wings: male 17–19, female 18.5–22.0; pronotum: male 6.8– 7.7, female 6.0–6.5; tegmen: male 7.5–9.0, female 8.0–10.5; hind femur: male 9.0–10.5, female 10.0–10.5; antenna: female 35; ovipositor: female 8.5–10.0 mm.
Etymology. The name of the new species refers to the small body size; from Latin pumilus —dwarf, noun in apposition.
description: Published as part of Ingrisch, Sigfrid, 2022, Revision of the genus Philmontis Willemse, 1966 and description of a new genus Philmontoides gen. nov. from New Guinea (Orthoptera: Tettigoniidae; Conocephalinae), pp. 101-151 in Zootaxa 5182 (2) on pages 126-127, DOI: 10.11646/zootaxa.5182.2.1, http://zenodo.org/record/7049507