Philmontis pumilus, Ingrisch, 2022

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), Zootaxa 5182 (2), pp. 101-151 : 126-127

publication ID	https://doi.org/ 10.11646/zootaxa.5182.2.1
publication LSID	lsid:zoobank.org:pub:8920DE84-2BE6-4A68-A7F7-AC987F1F894E
DOI	https://doi.org/10.5281/zenodo.7053837
persistent identifier	https://treatment.plazi.org/id/DB181868-FF81-FFD7-FF67-D74A295FF42E
treatment provided by	Plazi
scientific name	Philmontis pumilus
status	sp. nov.

Treatment

Philmontis pumilus sp. nov.

Figs. 1H View FIGURE 1 , 3D–E View FIGURE 3 , 4K View FIGURE 4 , 5I View FIGURE 5 , 6M View FIGURE 6 , 8L–M View FIGURE 8

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). GoogleMaps

Other specimens studied: same data as holotype— 5 females, 6 males ( BPBM) GoogleMaps .

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 View FIGURE 3 with Figs 3H–L View FIGURE 3 ).

Description. Small species with wings covering little more than half of abdomen ( Fig. 1H View FIGURE 1 ). 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 View FIGURE 4 ): 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 View FIGURE 3 ). 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 View FIGURE 5 ).

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 View FIGURE 8 ). 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.