Rugabinthus biakis, Tan & Robillard, 2022

Tan, Ming Kai & Robillard, Tony, 2022, Rugabinthus, a new genus of Lebinthina (Orthoptera, Gryllidae, Eneopterinae) from New Guinea, Journal of Orthoptera Research 31 (1), pp. 9-40 : 9

publication ID	https://dx.doi.org/10.3897/jor.31.73800
publication LSID	lsid:zoobank.org:pub:3906D111-1849-4F9B-87FD-F70673B1B60E
persistent identifier	https://treatment.plazi.org/id/D074F7D3-D6C5-463C-8D3E-4EFD304AD4C9
taxon LSID	lsid:zoobank.org:act:D074F7D3-D6C5-463C-8D3E-4EFD304AD4C9
treatment provided by	Journal of Orthoptera Research by Pensoft
scientific name	Rugabinthus biakis
status	sp. nov.

Treatment

Rugabinthus biakis View in CoL sp. nov.

(Figs 3 View Figure 3 , 4H View Figure 4 , 5H View Figure 5 , 6H View Figure 6 , 7H View Figure 7 , 8H View Figure 8 , 19 View Figure 19 , 20A View Figure 20 , 20B) View Figure 20

Material examined. -

Holotype: INDONESIA • ♂; West Papua, Biak Island (not far from N. coast of W New Guinea), secondary forest on hill near vill. Corem ; 14-15 November 2004; A. Gorochov leg.; ZIN . Paratypes: INDONESIA • 1♂; same information as holotype; molecular sample L86; MZB • 1♂; Biak Island (not far from N. coast of W New Guinea), secondary forest on hill near vill. Corem; 14-15 November 2004; A. Gorochov leg.; MNHN-EO-ENSIF1745 .

Other material. -

INDONESIA • 1 juvenile; West Papua, Biak Island, Biak Town , forest on not high hill near airport; 17-20 January 2012; leg. A. Gorochov; molecular sample L85; ZIN .

Type locality. -

INDONESIA: West Papua: Biak.

Etymology. -

The species is named after the type locality: Biak Island.

Diagnosis. -

This new species differs from all congeners by its small size; dorsum of head yellow brown with five well-separated and well-defined dark brown longitudinal bands; pronotal disk yellow brown with a median dark brown longitudinal band and sparse but well defined dark brown spots of different sizes; lateral lobe contrasting dark in coloration. It also differs from all congeners by male genitalia with pseudepiphallus rectangular, stouter than congeners, apex truncated forming a short posterior plate with a small median nodule.

Description. -

Small sized among congeners (Fig. 19 View Figure 19 ). Dorsum of head yellow brown with five well-separated and well-defined dark brown longitudinal bands, middle band widest resulting from fusion of two bands, partly split anteriorly (Fig. 4H View Figure 4 ). Fastigium yellow brown with dark brown patterns. Scapes brown. Antennae yellow brown basally, distally brown with yellow rings. Fastigium verticis and frons black, frons with two faint yellow brown spots, eyes underlined with yellow; clypeus and mouthparts dark brown to black, labrum distinctly cream-colored (Fig. 5H View Figure 5 ). Maxillary palpi cream-colored with brown patterns. Pronotal disk yellow brown with a median dark brown longitudinal band and sparse but well defined dark brown spots of different size (Fig. 4H View Figure 4 ). Lateral lobes of pronotum entirely dark brown, distinctly darker than disk (Fig. 6H View Figure 6 ). Legs pale yellow brown with well-defined brown spots and rings. FIs and FIIs mostly cream-colored with a few well-defined brown spots, knees brown; TIs and TIIs dark brown with a cream-colored ring in middle. FIIIs cream-colored with numerous oblique dark brown bands, knees dark brown. Tergites unicolorous dark brown.

Male. FWs reaching middle of fourth abdominal tergite. FW coloration (Fig. 7H View Figure 7 ): Dorsal field cells and veins mostly brown; some veins near basal area cream-colored; M vein orange brown; area between M and R infumate cream-colored; basal area with a large cream-colored spot on anterior corner and another one near 1A and 2A. Lateral field dark red brown in dorsal half, gray brown in ventral half. FW venation typical of genus, 1A bisinuate anterior to angle; oblique vein base faded, both its posterior and anterior branches almost straight. Apex of dorsal field obliquely rounded.

Male genitalia: (Figs 8H View Figure 8 , 20A View Figure 20 , 20B View Figure 20 ) Pseudepiphallus rectangular, stouter, and shorter than in congeners, very wide laterally at base of rami, its basal anterior margin almost straight, lateral margin generally parallel, apex truncated, forming a short posterior plate, slightly concave dorsally, with a small median nodule. Rami short, but longer than half of pseudepiphallus length. Pseudepiphallic parameres strongly bent 90° in the middle, apex strongly sclerotized and forming two stout lobules. Ectophallic apodemes surpassing anterior margin of pseudepiphallic sclerite. Endophallic sclerite short, barely reaching anterior margin of pseudepiphallus, with thin posterior lateral arms and a very small medio-posterior expansion.

Female. Unknown.

Measurements. -

See Table 1 View Table 1 .