Philmontoides affinis ( Willemse, 1966 ) 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 : 144-145

Philmontoides affinis ( Willemse, 1966) comb. nov.

Figs. 9B , 10A , 11F , 12E , 15A–C , 16B , 17K–L

Nicsara affinis Willemse, C. 1966

Nicsara affinis Nishida, G.M. 1979

Philmontis affinis Ingrisch. 2015

Holotype (male): Papua New Guinea: New Guinea (NE), Tsenga (mp), Upper Jimmi Valley, elev. 1200 m (5°25’S, 144°43’E), 14.vii.1955, leg. J.L. Gressitt — 1 male —depository: Bernice B. Bishop Museum, Honolulu ( BPBM).

Other specimens studied: Western Highlands, Baiyer Range , elev. 1150 m (5°9’S, 144°9’E), 10.x.1958, leg. J.L. Gressitt — 1 male ( BPBM); same locality, 19.x.1958, leg. J.L. Gressitt — 5 males, 1 female ( BPBM) .

Diagnosis. P. affinis belongs to the species with dorso-ventrally widened and on internal surface concave male cerci. Males can be differentiated from the other species of the genus with similar cerci by the shape of the narrow, rounded, and straight apical projections of the tenth abdominal tergite, which are differently modified in other species of the genus. The female is unique within the genus by the pair of auriculate modifications on the basal half of the subgenital plate.

Description. Pronotum elongate, disc with anterior margin faintly convex or little concave in middle, posterior margin broadly rounded, the latter covering only base of stridulatory area of tegmen, transverse furrows interrupted in middle; lateral lobes not very deep, ventral margin slightly concave, at end forming a rounded angle with posterior margin projecting laterad and clearly visible from above. Prosternal spines long; mesosternal lobes obtuse; metasternal lobes rounded with an angle or fold; Femora with the following number of spines on ventral margins: (1) 5-7 / 5-8; (2) 6-7 / 1-3; (3) 8-12 / 7-12 (n = 7); hind knee lobes bispinose.

Male. Stridulatory file ( Fig. 12E ): total length 1.53–1.58 mm; area with countable teeth 1.42–1.43 mm with 53–57 teeth; area with largest teeth 0.76–0.79 mm with 22–23 teeth (n = 2). Tenth abdominal tergite vaulted, hind margin broadly rounded, at end narrow, angularly excised and extended into a pair of short and narrow projections ( Fig. 11F ). Cerci compressed with convex external and concave internal surface, in about little more than apical half with a large rounded ventral expansion; dorsal margin with a long, rounded and curved projection in subbasal area with small acute spine at tip, also end of dorsal margin of cercus prolonged into a large acute spine ( Fig. 11F ). Subgenital plate nearly parallel-sided, hind margin concave, at both angles with a stylus at apico-ventral side. Titillators in basal area whitish hyaline, simple, forming narrow, semi-transparent bands with curved base, afterward widening and covered with scattered granules, along lateral margins bordered by a bunch of dense long hairs; apical area with dark, sub-hyaline rim and very fine granular surface; in apical area titillators curved again, of light color and covered by short hairs; apical margin forming a curved, sclerotized crest, little projecting on both sides ( Figs 15A–C ).

Female. Subgenital plate in central area forming a pair of auriculate expansions with stiffened rim and depressed surface, these structures are prolonged from dorso-lateral angles into stout cones with a few transverse riffles along ventral surface; area between expansions membranous; apical area of plate in ventral view parallel-sided with a medial furrow; at end divided into two short and stout, rounded lobes; in lateral view area behind basal expansion forming a short, parallel-sided and high plate with slightly convex apical margin ( Figs 17K–L ). Ovipositor as genus.

Coloration. Face of general color, fastigium verticis, antennal scrobae and internal side of scapus of antennae dark brown to black; lateral areas of occiput and dorsal areas of genae also black; anterior tibiae above and below tympana with black spots; pronotum with indistinct narrow, interrupted, black stripe along midline; lateral lobes mostly blackish but auditory swellings pale; tegmen with black lateral band, otherwise mostly with dark cells and light veins and veinlets; hind femur with black ring in sub-apical area.

Measurements (7 males, 1 female).—Body w/wings: male 33–36, female 36; body w/o wings: male 26–32, female 30; pronotum: male 6.2–8.5, female 7.2; tegmen: male 22–26, female 26.5; hind femur: male 20.0–22.5, female 22; antenna: male 80–100; ovipositor: female 25 mm.

Figures

FIGURE 9. Male habitus in dorsal view with left wings spread.—A, Philmontoides hageni (Dohrn, 1905) [Wanuma]; B, P. affinis (Willemse, 1966) [Baiyer Range]; C, P. wau sp. nov. [Vagau]; D, P. disjunctus sp. nov. [Tapini]; E, P. lobatus (Naskrecki & Rentz, 2010) [Hijob, Star Range]; F, P. commodus sp. nov. [Purosa]; G–H, globosus sp. nov. [Nabire]; I, P. striatus sp. nov. [East Sepik].—Scale bars 10 mm.

FIGURE 10. A–D, male abdominal apex with cerci in apical view; E, H–I, M, male cercus in dorsal view; F, J, cercus in lateral view; G, cercus in ventral view; K–L, cercus in oblique dorsal view.—A, Philmontoides affinis (Willemse, 1966) [Baiyer Range]; B, P. striatus sp. nov. [Etappenberg]; C, M, P. commodus sp. nov. [C, Okapa; M, Kassem Pass]; D, P. wau sp. nov. [Wau]; E–F, P. globosus sp. nov. [Nabire]; G–H, P. disjunctus sp. nov. [Tabini]; I–J, P. lobatus (Naskrecki & Rentz, 2010) [Star Range]; K–L, P. hageni (Dohrn, 1905) [K Dohrn collection; L Adelberg Mts].—Scale bars 1 mm. The arrow in F points at the apical spine which runs parallel to the rim of the lobe.

FIGURE 11. A–E, Male abdominal apex with tenth abdominal tergite and cerci in dorso-apical view; F–G, I, in dorsal view; H, in apical view; in some images also end of subgenital plate visible.—A, Philmontoides hageni (Dohrn, 1905) [Star Range]; B, P. lobatus (Naskrecki & Rentz, 2010) [Hijob]; C, P. globosus sp. nov. [Nabire]; D, P. disjunctus sp. nov. [Tabini]; E, P. commodus sp. nov. [Okapa]; F, P. affinis (Willemse, 1966) [Baiyer Range]; G–H, P. striatus sp. nov. [Etappenberg]; I, P. wau sp. nov. [Wau].—Scale bars 1 mm.

FIGURE 12. Stridulatory file on underside of male left tegmen.—A, Philmontoides hageni (Dohrn, 1905) [Finschhafen]; B, P. lobatus (Naskrecki & Rentz, 2010) [Star Range]; C, P. globosus sp. nov. [Nabire]; D, P. disjunctus sp. nov. [Tapini]; E, P. affinis (Willemse, 1966) [Baiyer Range]; F, P. striatus sp. nov. [Etappenberg]; G, P. commodus sp. nov. [Okapa]; H, P. wau sp. nov. [Wau]—Scale bars 1 mm.

FIGURE 15. Male titillators in ventro-apical view (A, C, E, F, I–J); do. in oblique ventro-apical view (B, D, G); do. view on apical expansion (H, K).—A–C, Philmontoides affinis (Willemse, 1962) [A–B, Baiyer Range, C, holotype]; D–E, P. commodus sp. nov. [Aiyurop]; F–H, P. striatus sp. nov. [Etappenberg]; I–K, P. wau sp. nov. [I, Vagau, J–K, Wau].—Scale bars 1 mm.

FIGURE 16. Female habitus in lateral view (A–G, I); female subgenital plate in lateral (H–J), ventral (K), and oblique lateral view (L).—A, Philmontoides geminus sp. nov. [Feramin]; B, P. affinis (Willemse, 1966); C, P. striatus sp. nov. [Lordberg]; D, P. commodus sp. nov. [Okapa]; E, P. hageni (Dohrn, 1905) [Wanuma]; F, holotype of Salomona vittata Kuthy, 1910, inset shows subgenital plate of same specimen; G–H, P. wau sp. nov. [McAdam Peak]; I–L, P. globosus sp. nov. [Nabire].—Abbreviation: b basal extension of subgenital plate.—Scale bars 10 mm (A–H), 1 mm (H–L and inset in G).

FIGURE 17. Female subgenital plate in ventral (A, C, E, G, K, I, O, M, P), lateral (B, D, F, H, J, L), and oblique apico-ventral (N) view.—A–B, Philmontoides hageni (Dohrn, 1905); C–F, P. lobatus (Naskrecki & Rentz, 2010) [C–D, Star Range 25 m from fully hardened specimen; E–F, Star Range 1500 m from freshly molded, soft specimen]; G–H, P. geminus sp. nov. [Feramin]; I–J, P. striatus sp. nov. [Etappenberg: I, well preserved; J, shrunken]; K–L, P. affinis (Willemse, 1966); M–N, P. commodus sp. nov. [M Mendi, N Mt Karimui]; O–P, P. wau sp. nov. [O, shrunken; P, well preserved].—Scale bars 1 mm. Abbreviations: b basal extension, c cover plate, m squeezed intersegmental membrane, p main plate.