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

description: Philmontis pandus sp. nov.
Figs. 1K, 3H–I, 4L, 5N, 6K–L, 8J–K
Holotype (male): Papua New Guinea: Morobe, NE Wau, Edie Creek, 2500 m (7°17’S, 146°44’E), 22.xi.1963, leg. J.L. Gressitt —depository: Bernice B. Bishop Museum, Honolulu (BPBM).
Other specimens studied: New Guinea: Dowalo W Zenag, elev. 2000 m (6°57’S, 146°35’59.45’’E), 4.ii.1971, leg. J.L. Gressitt — 2 females (BPBM); Papua New Guinea: Morobe, Edie Creek, elev. 2134 m, 21.ix.1964, leg. M.E. Bacchus — 1 female (NHM London); NE Wau, elev. 2400 m (7°17’S, 146°44’E), 9.–12.i.1962, leg. J. & M. Sedlacek, G. Monteith & Native Collectors — 1 female (BPBM); NE Wau, Edie Creek, elev. 2500 m (7°17’S, 146°44’E), 22.xi.1963, leg. J.L. Gressitt — 4 females, 2 males (BPBM); Wau, elev. 1200 m (7°20’S, 146°45’E), 11.– 15.x.1961, leg. J. Sedlacek — 1 male (BPBM); New Guinea (NE), Morobe, Wau, Mt Kaindi, elev. 2350 m (7°21’S 146°41’E), 20.iv.1964, leg. J.L. Gressitt — 1 female (BPBM); same locality, 31.xii.1964, leg. J.L.& M. Gressitt — 1 female (BPBM); same locality, 23.iii.1966, leg. J.L. Gressitt — 1 female (BPBM); same locality, 4.iv.1967, leg. J.J.H. Szent-Ivany — 1 female (BPBM).
Diagnosis. The new species differs from other species of the genus by the shape of the male cerci. The internal surface of the male cercus of P. pandus sp. nov. has a concave depression on internal surface as in P. pumilus sp. nov., which is, however, less extended than in the latter species. Moreover, the internal projection of the cercus is short, compressed and inserted just before the short, conical, and in-curved apical area of the cercus stem while in P. pumilus it is prolonged with rounded stem and inserted markedly before the slightly curved, compressed and longer apical area. Females of P. pandus differ from P. pumilus by the shape of the central area of the subgenital plate that is widened laterally and in midline interrupted by a narrow membranous fissure that widens at end thus that the apical margin appears bi-triangular with apical spines arising from the angles while in P. pumilus the central plate is rhombic with the apical spines arising from the apical-lateral angles. Compared to P. profusus sp. nov., the subgenital plate of P. pandus appears in lateral view more strongly curved while in P. profusus nearly straight.
Description. Small species with wings not fully covering abdomen, in male leaving the last two or three segments free (Fig.1K), in female covering about half of abdomen, in one female nearly reaching end of abdomen (Figs 6K–L). Pronotum elongate, disc with anterior margin faintly concave, posterior margin broadly rounded. Prosternal spines minute or absent; mesosternal lobes obtuse; metasternal lobes rounded. Femora with the following number of spines on ventral margins: (1) 3-5 / 1-4; (2) 4-6 / 0-2; (3) 5-8 / 0 (n = 9); hind knee lobes with one spine.
Male. Stridulatory file (Fig. 4L): total length 1.06, 1.12 mm; area with countable teeth 0.94, 1.04 mm with 52, 63 countable teeth; from base to end of distinct area 0.84, 0.82 mm with 41, 42 teeth; area with distinctly spaced, including largest teeth 0.75, 0.70 mm with 39, 33 teeth (n = 2; specimens from Edie Creek, Wau). Cerci with external surface convex, internal surface with concave furrow widening from more basal to apical area; at end cercus narrowed and markedly curved mediad, terminating into a small acute tooth; just before curvature with a small, compressed and curved internal process from dorsal margin with longer convex distal and shorter concave proximal margin, at end with two acute teeth distinctly separated from each other (Fig. 3H–I). Subgenital plate roundly excised from base, ventral disc with little converging margins that are curved dorsad and then laterad forming compressed lateral expansions with little wavy margin; central disc in apical area with lateral margins extended into long, rounded projections that are widened at end and carry minute styli at oblique tip. Titillators long and narrow, basal area hyaline, sub-fused and expanded apico-laterad; afterward narrow parallel-sided, in about mid-length widened, forming a transverse triangular area with curved apical arms that are at end provided with a sclerotized disc twisted against titillator axis; surface of titillators largely hyaline, in apical half darker than in basal half; surface of triangular, widened area light brown with scattered small brownish spots (Fig. 5N).
Female. Subgenital plate with anterior margin faintly convex in middle; with a narrow membranous fissure along midline of disc widening apically; anterior area extended on both sides into a large, rounded expansion with concave surface that is subdivided by a lateral extension of the bulging anterior margin of the disc; disc behind lateral extensions with converging lateral margins that are at end of plate extended into narrow conical extensions with approaching margins and subacute tip (Figs 8J–K). Ovipositor stout at base; curved with regularly approaching margins toward acute tip. Wing length varying from covering basal half to almost fully covering abdomen (Figs 6K–L).
Measurements (4 males, 12 females).—Body w/o wings: male 17.5–20.0, female 15–21; pronotum: male 5.2–7.5, female 5.5–7.2; tegmen: male 8.5–10.0, female 5.7–12.0; hind femur: male 9.7–11.0, female 10.0–11.5; antenna: male 40, female 50–55; ovipositor: female 9–10 mm.
Etymology. Named for the strongly curved female subgenital plate that in lateral view appears hooked; from Latin pandus curved, hooked.
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 125-126, DOI: 10.11646/zootaxa.5182.2.1, http://zenodo.org/record/7049507