Lebinthus polillensis, Baroga, Jessica B., Yap, Sheryl A. & Robillard, Tony, 2016

Baroga, Jessica B., Yap, Sheryl A. & Robillard, Tony, 2016, Two new species of Eneopterinae crickets (Orthoptera: Gryllidae) from Luzon, Philippines, Zootaxa 4139 (1), pp. 93-105 : 95-99

Lebinthus polillensis n. sp.

( Figs. 1–5 )

http://lsid.speciesfile.org/urn:lsid: Orthoptera .speciesfile.org:TaxonName:479342

Type material. Holotype male ( JBB 036): Philippines, Luzon, Quezon Province, Polillo Island, Barangay Pinaglubayan, secondary forest, night, rainy, leaf litter, 4–6.vi.2014, coll. J.B. Baroga, S.A. Yap & F. Signabon (UPLBMNH ORT-01096.). Female ( JBB 037): same information as the holotype (MNHN-EO-ENSIF80).

Other material examined. Philippines [Luzon], PI [ Philippines Islands], Camarines Sur, Mt. Iriga, H.M. Torrevillas rec: 500–600 m, 9.IV. [19]62, 1♀ ( BPBM); 500–600 m, 17.IV. [19]62, 1♀ ( BPBM); 500–600 m, 13.IV. [19]62, 1♂ ( BPBM); 500 m, 25.III. [19]62, 1♂ ( MNHN).

Type locality. Philippines, Luzon, Quezon Province, Polillo Island, Brgy. Pinaglubayan.

Distribution. Philippines, southern Luzon, Polillo Island and Camarines Sur

Etymology. The species is named after the type locality, the island of Polillo.

Diagnosis. Lebinthus polillensis resembles L. puyos and L. estrellae , but differs by upper face color, dark brown mottled with dark patches, and by male genitalia, with pseudepiphallic parameres C-shaped and lophi short and triangular, shorter and not globular as in L. puyos , but longer than in L. estrellae . Female FWs slightly overlapping, unlike in other species.

Description. Body size small. Coloration brown with dark and light patterns ( Figs. 1 , 2 ). Head dorsum light brown ( Fig. 2 ) with four wide longitudinal dark bands, with triangular patch posterior to eyes; area posterior to eyes yellow. Fastigium wider than long, setose, light brown, without a contrasted yellow band apically, slightly carinated apically; upper part of face dark brown, with dark brown to black patches. Scapes light brown with dark patterns; antennae yellow brown at base then progressively dark brown. Face ( Fig. 2 B, 2C) and lateral part of head mostly dark brown, with black patches below antennae and eyes. Mouthparts mostly light brown; maxillary palpi light brown with dark brown longitudinal patterns. Pronotum: Dorsal disk trapezoidal, straight posteriorly; light brown mottled with dark brown. Lateral lobes black dorsally, ventral margin yellow with a median black pattern ( Fig. 2 C). Legs: Fore and median legs light brown, femora with dark brown spots, tibiae with dark rings. Hind femora light brown with strong striated dark patterns laterally, dark brown dorsally, knees darker, with a pale inner preapical area; hind tibiae with dark rings. Tarsomeres I/ III-1 light brown, apices dark brown. Tarsomeres III-1 with 2–3 spines on dorsal outer edge (n=2) and one (n=2) on outer faces. Abdomen brown dorsally, yellowish brown ventrally. Cerci yellowish, with faint dark rings near apex.

Male. FWs not reaching abdomen mid-length, FW coloration ( Fig. 3 A): Cells brown, not translucent, veins brown except M, R, and 1A, orange brown to light brown; base of CuA, and area between M and R whitish, without transverse veins; Sc dark brown, area between R and Sc dark brown, rest of lateral field progressively lighter toward ventral margin, with dark brown longitudinal veins. FW venation ( Fig. 3 A): 1A widely curved (angle>120°); CuP visible basally. Diagonal vein incomplete, not reaching file. Harp wide, occupying most of dorsal field surface, with a strong transverse oblique vein, delimiting a false mirror barely rounded. CuA curved innerly near apex. Median fold very small and located dorsally. Longitudinal veins of dorsal field stronger apically, transverse veins very weak. Mirror (d1) not differentiated. Apical field absent, with no bifurcation of CuA posterior to diagonal vein. Lateral field with 6 strong longitudinal veins including M, R, Sc and 3 more ventral veins; laterodorsal angle made by M; Sc without bifurcating veins. Subgenital plate elongate, clog-shaped.

Male genitalia ( Fig. 4 ): Close to male genitalia of L. puyos and L. estrellae . Pseudepiphallic sclerite elongate, convex dorsally, posterior apex with short triangular lophi, setose, longer than wide, separated by a V-shaped indentation; anterior margin almost straight, its lateral margins slightly raised dorsally. Rami short and thin. Pseudepiphallic parameres C-shaped. Ectophallic arc complete. Ectophallic fold with a wide rounded preapical sclerite. Ectophallic apodemes parallel and long, exceeding anterior margin of pseudepiphallus. Endophallic sclerite very long and thin, curved dorsally, exceeding anterior margin of pseudepiphallus, its posterior apex with a small median expansion and short lateral arms; endophallic apodeme made of lateral lamella but without a median crest.

Female. FWs short, reaching posterior margin of second tergite ( Fig. 3 B), slightly overlapping basally; dorsal field brown with seven strong brown longitudinal veins. Lateral field light brown with three strong dark brown longitudinal veins. Posterior margin of dorsal field straight. Ovipositor shorter than hind femora; apex lanceolate, its dorsal edge denticulate.

Female genitalia. Papilla cylindrical and membranous.

Habitat and life history traits. L. polillensis is found underneath leaf litters or in areas with moist ground in secondary forest ( Fig.5 ).

Remark. Specimens from Mount Iriga only vary from the type specimens by slight details of coloration (holotype lighter), which could be due to preservation method and difference of age of specimens. Male genitalia and venation in both sexes are similar.

Measurements (in mm). See Table 1.

PronL PronW FWL FWW HWT FIIIL FIIIW TIIIL Male holotype 2.1 3.4 3.7 2.93 - 9.8 3 8.8 Female allotype 2 3.3 2 - - 9.9 3.1 8.2

TIIIs TaIIIs OL

Ias Ibs Oas Obs

Male holotype 7 5 11 5 2 -

Female allotype 5 7 4 10 2 7.2

Figures

FIGURE 1. Lebinthus polillensis n. sp., holotype male in dorsal (A), and lateral (B) views; female in dorsal (C) and lateral (D) views. Scale bar: 5 mm.

FIGURE 2. Lebinthus polillensis n. sp., head in dorsal (A), facial (B) and lateral (C) views. Scale bar: 1 mm.

FIGURE 3. Lebinthus polillensis n. sp., FW venation of male (A); and of female (B). Scale bar: 1 mm.

FIGURE 4. Lebinthus polillensis n. sp., male genitalia in dorsal (A), ventral (B) and lateral (C) views. Scale bar: 1 mm.

FIGURE 5. Habitat of Lebinthus polillensis n. sp., secondary forest at Pinaglubayan, Polillo Island (A), juvenile on leaf litters (B) (Photographs by J. B. Baroga).