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

description: Philmontis robustus sp. nov.
Figs. 1I, 3J–K, 4I, 5M
Holotype: Papua New Guinea: New Guinea NE, Morobe, 19–29 km south of Wau, Bulldog Road, elev. 2200–2500 m (7°37’S, 146°43’E), 31.v.1962, leg. J. Sedlacek —depository: Bernice B. Bishop Museum, Honolulu (BPBM). The type is unique.
Diagnosis. The new species is characterized by the, compared to the small body size, stout and robust habitus and rather thick male cerci that are stout in basal area, then little narrowed from internal margin, bent mediad in sub-apical area and terminate into a wide rounded end with a spinule at tip; unique is also the compressed internal process in about mid-length of cercus that has the proximal margin much shorter than the distal margin, resulting in an oblique apical margin that is provided with a row of four acute teeth. The cerci of P. robustus sp. nov. are remotely similar to those of P. pandus sp. nov., differ, however, by the rounded cercus stem being without concave depression on internal surface. Furthermore, the internal process is inserted markedly before the incurved apical area of the cercus and widened with four acute teeth instead of narrow with two acute teeth in P. pandus and the shape of cercus is distinctly more robust than in the latter species.
Description. Small, brachypterous species with tegmen covering about half of abdomen. Face of uniform color, antennal scrobae black. Pronotum elongate, disc with anterior margin faintly concave, posterior margin broadly rounded. Prosternal spines absent; mesosternal lobes obtuse; metasternal lobes rounded. Femora with the following number of spines on ventral margins: (1) 4-5 / 1-3; (2) 4 / 0-1; (3) 5 / 0; hind knee lobes unispinose (n = 1).
Male. Stridulatory file with about 35 teeth at 0.75 mm that are distinct and clearly spaced in basal and central areas, becoming denser and smaller toward apical area; at end with a number of very tiny, uncountable pegs; total file length including uncountable pegs at both ends 0.99 mm (Fig. 4I). Tenth abdominal tergite little longer than preceding tergite, with hind margin rounded but in middle with a rounded excision of about one third the length of the tergite (Fig. 3J). Cerci in about basal two thirds stout and cylindrical, in apical third narrow with convex external and concave internal surface, curved mediad and terminating into a small acute tooth; at transient zone with a stout, dorso-ventrally compressed internal process that carries along apical margin four minute acute teeth, the last tooth at tip (Fig. 3K). Subgenital plate in more than basal half with upcurved and roundly extended lateral areas; ventral disc in middle excavated and with fine medial ridge, lateral margins roundly swollen and later extended into projections that carry at tip narrow styli; hind margin deep roundly excised. Titillators curved at base, afterward triangularly widening with subtruncate apical margin that is extended at distal angle into a compressed, sclerotized disc (Fig. 5M).
Coloration. Of rather uniform pale color (discolored); tegmen with blackish cells and light veins.
Measurements (1 male).—Body w/o wings: 18; pronotum: 7.2; tegmen: 7; hind femur: 11 mm.
Etymology. Named for the stout male cerci with strong internal process; from Latin robustus —strong, robust.
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 124-125, DOI: 10.11646/zootaxa.5182.2.1, http://zenodo.org/record/7049507