Microbinthus elegans, Tan & Robillard, 2021

Tan, Ming Kai & Robillard, Tony, 2021, New taxa of the subtribe Lebinthina (Orthoptera: Gryllidae: Eneopterinae Lebinthini) from New Guinea and nearby islands, Zootaxa 5082 (6), pp. 583-599: 594-596

publication ID

https://doi.org/10.11646/zootaxa.5082.6.5

publication LSID

lsid:zoobank.org:pub:3A2923DF-A578-46B9-AB81-B3AC895E190D

DOI

http://doi.org/10.5281/zenodo.5797714

persistent identifier

http://treatment.plazi.org/id/D93287C5-F115-FFB9-FF58-F94AFE82F966

treatment provided by

Plazi

scientific name

Microbinthus elegans
status

sp. nov.

Microbinthus elegans   sp. nov.

Figs 9–11 View FIGURE 9 View FIGURE 10 View FIGURE 11

Material examined. Holotype: PAPUA NEW GUINEA • ♂; 15 km NE, by north of Port Moresby; 9°22’S, 147°13’E [ near intersection of Laloki River and Hubert Murray Highway ]; 24 April 1971; Balderson & Baker leg.; Key’s field notes: Trip 171, Stop 27975.6; molecular sample L208 ( ANIC14-037005 View Materials ). GoogleMaps  

Type locality. PAPUA NEW GUINEA: near Port Moresby  

Etymology. This species name refers to the elegantly-elongated pseudepiphallic parameres and endophallic sclerite which are unique among congeners.

Diagnosis. This new species differs from congeners by male genitalia with pseudepiphallic lophi broadly spaced apart, with truncated apices pointing obliquely externally (instead of straight posteriorly); pseudepiphallic parameres elongated and enlarged with lateral lobe forming a falcate process; endophallic sclerite long (instead of short).

Description. Size small, average for the genus ( Fig. 9 View FIGURE 9 ). Vertex and fastigium cream-coloured with a dark brown spot in middle. Dorsum of head yellow brown with mottled brown, cream-coloured at posterior end with six longitudinal dark bands, the median ones almost fused together ( Fig. 10A View FIGURE 10 ). Scapes pale generally dark brown. Antennae yellow brown. Face, frons, clypeus and mouth parts black ( Fig. 10B View FIGURE 10 ). Maxillary palpi with segments cream-coloured, with apices dark ( Fig. 10B View FIGURE 10 ). Gena black, posterior end cream-coloured with a black band at the back of eyes and another black band running ventrad towards mouthparts ( Fig. 10C View FIGURE 10 ). Pronotum dorsal disk yellow brown mottled with black spots, anterior margin straight ( Fig. 10A View FIGURE 10 ); lateral lobes black with posterior and ventral margins cream-coloured ( Fig. 10C View FIGURE 10 ). Legs: FI–II light coloured with dark spots and stripes, knees areas dark; TI–II dark brown with two pale rings, one at base and another in middle; tarsomeres 1 and 3 of each leg cream-coloured basally then brown; FIII brown, knees dark brown; TIII red brown. Abdomen dark brown dorsally and laterally, sternites cream-coloured. Cerci dark brown.

Male: FW reaching base of forth tergite. FW colouration ( Fig. 10D View FIGURE 10 ): Dorsal field cells mostly dark brown, veins generally brown or dark brown, veins at apical area yellow; area between M and Sc pale yellow; vein R brown, R and Sc orange. Lateral field cells dark; longitudinal veins dark brown. FW venation: harp oblique vein indistinct. Mirror made of an elongated cell not differentiated from rest of D alignment. Apical field small, made of two short cell alignments; apex of dorsal field truncated. Lateral field with Sc and 4 strong ventral longitudinal veins straight.

Male genitalia ( Fig. 11 View FIGURE 11 ): Pseudepiphallus triangular, elongate, its basal margin substraight, its lateral margins slightly raised dorsally, posterior apex truncated, with paired lophi; lophi broadly spaced apart, setose dorsally and ventrally with apices somewhat truncated and pointing obliquely from each other. Rami longer than half of pseudepiphallus length, slightly curved. Pseudepiphallic parameres elongated, forming a pair of claws oriented posteriorly, with a dorsal lobe small with posterior margin acute, a lateral lobe oriented ventrally producing a falcate process with acute apex, and an extended flat basal lobe. Ectophallic apodemes long, reaching beyond anterior margin of pseudepiphallic sclerite, diverging from each other basally. Ectophallic arc transverse. Ectophallic fold with parallel rectangular sclerites, not reaching base of pseudepiphallic lophi. Endophallic sclerite narrowly Y-shaped, comprising a long anterior region and indistinct median expansion, fairly elongated lateral arms with inner margins straight and outer margins rounded.

Female: Unknown.

Measurements (in mm). Male holotype PronL = 1.8, PronW = 2.8, FWL = 3.2, FWW = 2.4, FIIIL = 7.2, FIIIW = 2.5, TIIIL = 6.1.