Rugabinthus tariku, 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/D6961759-141B-40F6-95ED-524D310B8CE2
taxon LSID	lsid:zoobank.org:act:D6961759-141B-40F6-95ED-524D310B8CE2
treatment provided by	Journal of Orthoptera Research by Pensoft
scientific name	Rugabinthus tariku
status	sp. nov.

Treatment

Rugabinthus tariku View in CoL sp. nov.

(Figs 3 View Figure 3 , 4J View Figure 4 , 5J View Figure 5 , 6J View Figure 6 , 7J View Figure 7 , 8J View Figure 8 , 9G View Figure 9 , 10G View Figure 10 , 20E View Figure 20 , 20F View Figure 20 , 22) View Figure 22

Material examined. -

Holotype: INDONESIA • ♂; West Papua, Fawi [Faowi] village in upper part of Tariku River (tributary of Mamberamo River ), partly low-lying forest and partly forest on hills; 29 January-17 February 2012; A. Gorochov leg.; molecular sample L93; ZIN . Paratypes: INDONESIA • 1♂, 1♀; same information as holotype; ZIN • 1♂, 1♀; same information as holotype; MNHN-EO-ENSIF11142-ENSIF11143 • 1♂, same information as holotype; MZB.

Type locality. -

INDONESIA: West Papua: Faowi.

Etymology. -

This species is named after the Tariku River; noun in apposition. This species is named after the tributary river rather than the main Mamberamo River, because it has smaller and stouter male genitalia compared to the sympatric species R. mamberamo .

Diagnosis. -

This new species differs from all congeners by male FW venation with extremely indented 1A vein, with its transverse part restricted to inner half of FW, and by male genitalia with pseudepiphallus rectangular, its basal margin strongly indented in the middle, slightly widened laterally near base of rami. Posterior part of pseudepiphallus short and trilobate, with two short stout lophi linked by a thin sclerotized plate forming a median lobe; pseudepiphallic parameres very stout, strongly bent 90° in the middle. General shape of male genitalia similar to that of R. biakis , from which the new species differs by apex of pseudepiphallus, base of rami, and parameres; the two species also differ in body coloration. From the sympatric species R. mamberamo , the new species differs by smaller size and by male and female genitalia.

Description. -

Small to average sized among congeners (Fig. 22 View Figure 22 ). Dorsum of head with broad red brown bands barely separated (visible only near posterior margin) (Fig. 4J View Figure 4 ). Fastigium dark red brown (Fig. 4J View Figure 4 ). Scapes red brown. Fastigium verticis and frons dark brown, frons with faint yellow brown spots; clypeus and mouthparts dark brown, labrum yellow brown (Fig. 5J View Figure 5 ). Pronotal disk dark brown with anterior margin yellow brown and posterior margin with some faint irregular yellow brown spots (Fig. 4J View Figure 4 ). Lateral lobes not darker than disk (Fig. 6J View Figure 6 ). Legs pale brown with few dark brown spots and patterns. FIIIs brown, knees dark brown to black. Tergites brown, with posterior margin darker.

Male. FWs reaching middle of third abdominal tergite. FW coloration (Fig. 7J View Figure 7 ): Dorsal field cells and veins mostly brown; with area between M and R infumate cream-colored; basal area with a cream-colored spot on lateral corner. Lateral field dark brown, more gray-brown near ventral margin. FW venation typical of genus, with 1A vein strongly bisinuate, forming a big notch restricting transverse part of 1A to inner half of FWs. Oblique vein posterior branch almost straight; anterior branch simple. Apex of dorsal field rounded.

Male genitalia: (Figs 8J View Figure 8 , 20E View Figure 20 , 20F View Figure 20 ) Pseudepiphallus short and rectangular, its basal margin strongly indented in the middle, slightly raised dorsally, widened laterally at base of rami. Lateral margins parallel; posterior part of pseudepiphallus short, apex truncated, forming three lobules, including two stout lophi linked by a thin sclerotized plate forming the median lobe. Rami short, shorter than half of pseudepiphallus length. Pseudepiphallic parameres very stout, strongly bent 90° in the middle, apex strongly enlarged and sclerotized and forming two stout lobules. Ectophallic fold forming a wide plate apically, with thin parallel sclerites. Ectophallic apodemes surpassing anterior margin of pseudepiphallic sclerite, with lateral arms elongated. Endophallic sclerite very elongated anteriorly, forming a wide triangular plate carrying a narrow crest dorsally; its posterior apex with thin lateral arms but without median expansion.

Female. FW slightly surpassing second tergite, with a distinct cream-colored rounded spot at base (Fig. 9G View Figure 9 ).

Female genitalia: Ovipositor distinctly shorter than FIII. Copulatory papilla globular, its basal part with an irregular sclerotization forming a basal rim with a short basal plate curved dorsally; apex rounded, folded ventrally and slightly sclerotized (Fig. 10G View Figure 10 ).

Measurements. -

See Table 1 View Table 1 .