Phaloria dischidia Tan & Robillard, 2021

Tan, Ming Kai, Rahmadi, Cahyo & Robillard, Tony, 2021, New species of Phaloria (Orthoptera: Phalangopsidae: Phaloriinae) from West Papua (Indonesia), Zootaxa 4985 (4), pp. 513-530 : 515-516

publication ID 10.11646/zootaxa.4985.4.5

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Phaloria dischidia Tan & Robillard

sp. nov.

Phaloria dischidia Tan & Robillard , sp. nov.

( Figs. 1A View FIGURE 1 , 2A View FIGURE 2 , 3A View FIGURE 3 , 4A View FIGURE 4 , 5A, 5B View FIGURE 5 , 6A, 6B View FIGURE 6 )

Material examined. Holotype (male, LEN2014 -TR213), New Guinea, Indonesia, West Papua, Lobo, S3.7033056, E134.071444 ( LOBO6 ), 221 m. a.s.l., forêt proche PK8/ route Lobo-Kaimana , crête prox. camp, forêt primaire [forest near PK8 / Lobo-Kaimana road, ridge proximately camp, primary forest], 21–30.x.2014, nuit [night], sur plante [on plant], T. Robillard ( MZB.Orth.21838). GoogleMaps

Paratype: 1 male ( LEN2014 -TR214), same locality and details as holotype, molecular sample P1 ( MNHN-EO-ENSIF 1730 ) .

Type locality. New Guinea, Indonesia, West Papua, Kaimana Regency, Lobo

Etymology. The species name refers to the characteristic shape of pseudepiphallus parameres with basal inner lobe distinctly clefted (schidius, in Latin for cleft), forming two triangular lobules (dis, in Greek for two).

Diagnosis. This new species is unique among congeners by genitalia: pseudepiphallic lobes slender and tapering before enlarging into rhomboidal apex; pseudepiphallic parameres with a rectangular and distinctly clefted basal inner lobe, and a stout and curved hook-like apical outer process; ectophallic apodeme inner apical arm straight pointing inner before bending posteriorly and outer apical arm with apex enlarged and ovate with the narrower end at the base.

This new species is most similar to P. beybienkoi Gorochov, 2005 from Supiori Island (north of West Papua) in habitus, colour patterns and male genitalia. It differs by pseudepiphallic parameres with inner basal lobe more rectangular and forming two angular lobules (instead of rounded margin) and pseudepiphallic lobes more angular rather than rounded. It is also similar to P. similis Chopard, 1968 and P. parasimilis Gorochov, 1999 from New Guinea by pseudepiphallic parameres with rectangular lobe but differs by the presence of long apical hooked-like process (absence in both species).

Subgeneric status. This species should belong to the subgenus Papuloria based on the pseudepiphallus with a pair of lateral lophi and endophallic sclerite without large unpaired apodeme directed anteriorly.

Description. Medium sized among congeners ( Fig. 1A View FIGURE 1 ). Head dorsum yellow brown, more reddish posteriorly ( Fig. 2A View FIGURE 2 ). Fastigium red brown. Scapes yellow to red brown. Antennae yellow brown. Fastigium verticis dark brown, frons dark brown with some yellow brown spots; clypeus yellow brown with a pair of triangular dark brown lateral spots; mouthparts generally yellow brown ( Fig. 3A View FIGURE 3 ). Maxillary palpi pale coloured, apices of segments slightly brownish ( Fig. 3A View FIGURE 3 ). Lateral part of head yellow to red brown; with a dark brown stripe running ventro-anteriorly from the ventro-anterior part of eyes; with another dark brown stripe running posteriorly from behind eye. Pronotal disk dark purple brown with some parts red brown; posterior margin straight ( Fig. 2A View FIGURE 2 ). Lateral lobes of pronotum with dorsal half dark purple brown, ventral half red brown. Legs pale yellow brown with brown rings. Inner tympanum relatively small and oval; outer tympanum similarly sized, but slightly more oblong. FIs and FIIs with 2 incomplete rings near knees, basally with some brown spots on the dorsal and inner surface. TIs with three brown rings; one each after tympanum, in the middle, and near apex. FIIIs yellow brown with red brown patterns and three oblique bands, knees brown. TIIIs yellow brown with brown bands. Tergites brown.

Male. FW 1.9–2.0 times longer than wide, surpassing abdominal apex, mostly yellow brown, some parts hyalinous ( Fig. 4A View FIGURE 4 ). FW venation typical of genus, 6 strongly sinuous veins in harp; mirror 0.9 times as long as wide, very large and separated by two dividing veins: basal one mostly straight, distal one obliquely curved (slightly sinuous). Apical field short, 0.6 times shorter than length of mirror. Lateral field with R and M diverging posteriorly, with 6 faint cross-veins; Sc with 22 projections. Hind wings reaching apex of FW, not exceeding FWs.

Male genitalia ( Figs. 5A, 5B View FIGURE 5 ). Pseudepiphallus with lateral margins slightly converging posteriorly; with posterior margin angularly, deeply and broadly incised in the middle. Pseudepiphallic lobe elongated, slightly curved internally and tapering before enlarging into rhomboidal apex. Rami short, only slightly longer than half the pseudepiphallus length, bent apically, but not connected. Pseudepiphallic parameres strongly sclerotized, elongated and slightly curved, with a dorso-basal process curved with subacute apex, with a rectangular ventro-basal inner lobe and a stout and curved hook-like apical outer process; basal inner lobe distinctly clefted, forming two triangular lobules. Ectophallic apodemes fork-shaped, with basal end narrow; inner apical arm straight, pointing inner (parallel to anterior margin of pseudepiphallus) before bending posteriorly into a narrow apex; outer apical arm straight, with apex enlarged and ovate with the narrower end at the base. Ectophallic fold forming two elongated plate-like structures; lateral margins widened posteriorly, posterior end broader than base, with apex truncated but with a small obtuse lateral lobe. Endophallic sclerite plate-like, wider than long.

Female. Unknown.

Measurements (in mm). Male holotype PronL = 2.4, PronW = 4.1, FWL = 11.4, FWW = 6.1, FIIIL = 9.0, FIIIW = 3.0, TIIIL = 9.3; male paratype PronL = 2.2, PronW = 4.0, FWL = 11.4, FWW = 5.7, FIIIL = 9.0, FIIIW = 3.1, TIIIL = 9.0.


Tavera, Department of Geology and Geophysics


Museum Zoologicum Bogoriense

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