Polydictya khmera, Constant & Pham, 1843

Constant, Jérôme & Pham, Hong Thai, 1843, Polydictya lanternflies of the Indochinese region: Six new species and identification key (Hemiptera: Fulgoromorpha: Fulgoridae), Belgian Journal of Entomology 86, pp. 1-42 : 1-42

Polydictya khmera sp. nov.

urn:lsid:zoobank.org:act:1CC12CBC-68F7-4AF9-81EA-8A5DD880A854

Figs 4 , 6–7

DIAGNOSIS. The species can be separated from all other Polydictya species by the following combination of characters: (1) tegmina with paler and darker areas forming cloudy effect ( Fig. 6 A ); (2) posterior wings with bright orange basal area extending to distal 2/3 and remaining part opaque ( Fig. 6 A ); (3) frons with dorsal margin very slightly projecting anterodorsally ( Fig. 6 B, D ), yellow-brown ( Fig. 6 D ); (4) protibiae slightly laminate, brown basally and black distally with pale yellowish ring in middle ( Fig. 6 A, C ); (5) abdomen red dorsally ( Fig. 6 A ); (6) genital segments orange.

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15 The closest species are P. chantrainei Nagai & Porion, 2004 ( Thailand, Malaysia – Fig. 1 ) P. grootaerti Constant & Pham, 2017 ( Vietnam – CONSTANT & PHAM, 2017: fig. 3), and P. kuntzi Nagai & Porion, 2004 (Borneo – Fig. 18 ). It can be separated from P. chantrainei by character (2): the latter shows the brown coloured part of the posterior wings mostly translucent (entirely opaque in P. khmera sp. nov.), the more elongate anal tube (1.66 times longer than broad in P. khmera sp. nov.; 1.42 in P. chantrainei ), the endosomal process of the aedeagus distally curved and broad in dorsal view (rather straight and narrow in P. chantrainei ); from P. grootaerti by character (3): the latter shows strongly rounded anterior margin of frons (smoothly rounded and very slightly projecting anterodorsally in P. khmera sp. nov.), the endosomal process with a deep emargination on inner margin in dorsal view and weak lateral teeth (not emarginated and with strong teeth in P. grootaerti ); from P. kuntzi by characters (2): the latter shows bright orange basal area of posterior wings extending to half-length and distal brown area extending towards base along costal margin (orange area extending to 2/3 of wing and brown area not extending towards base in P. khmera sp. nov.) and (5): P. kuntzi shows the central portion of dorsum of abdomen black (dorsum of abdomen red in P. khmera sp. nov.).

ETYMOLOGY. The species epithet derives from “ khmer ”, a hindi word meaning cambodian, and refers to the country of origin of this new species.

TYPE MATERIAL. CAMBODIA: Holotype ♂ ( Fig. 6 – dissected): [Coll. I.R.Sc.N.B., Cambodia, Koh Kong prov., Tatai, 11°35’13”N 103°05’50”E, 9-19.x.2016, Malaise trap, GTI Project, Leg. J. Constant & J. Bresseel, I.G.: 33.345] ( RBINS).

DESCRIPTION.

Measurements and ratios: LT: ♂ (n = 1): 20.3 mm; LTg/BTg = 3.1; BV/LV = 4.5; LF/BF = 0.81.

Head: ( Fig. 6 B, D, F ) yellow-brown with frons and clypeus slightly darker; vertex curved and deeply grooved transversely with lowest point in middle, and with all 4 margins carinate; frons barely visible from above, convex, smooth, subquadrate with strong impression before eye and elongate impression parallel to lateral margin on ventral half of frons; widening in rounded lobes laterally near frontoclypeal joint; clypeus slightly narrower and shorter than frons; labium elongate, brown, surpassing metacoxae; antennae dark brown with scape cylindrical, elongate and pedicel inflated, bulbous.

Thorax: ( Fig. 6 B, D, F ) pronotum yellow-brown dorsally with lateral lobes darker; mesonotum brown with pair of longitudinal irregular yellowish markings on each side of median line; pro-, meso- and metasternites brown. Pronotum weakly rugulose, longitudinal carina absent; central weak hump on median line with pair of impressed points on each side of disc. Mesonotum weakly rugulose centrally, smooth laterally to peridiscal carinae; obsolete median and peridiscal carinae; scutellum slightly impressed; tegulae yellow-brown; metanotum bright red.

Tegmina: ( Fig. 6 A, C, E ) dark brown cells and pale yellow-brown dense venation producing cloudy effect; basal irregular black transverse band; pale yellowish area at cubital angle; costal and postclaval margins subparallel, apex obliquely rounded.

Posterior wings: ( Fig. 6 A, C ) brown on distal half, along sutural margin and on large portion of anal area; basal half bright orange with bright red small basal area; orange zone slightly extending distally along CuA2; veins concolorous with ground colour, slightly darker on distal brown portion; broader than tegmina.

16 Legs: ( Fig. 6 A, C ) elongate and slender with pro- and mesofemora and tibiae dorsoventrally flattened; pro- and mesotibiae narrowing basally and distally. All coxae and trochanters dark brown. Pro- and mesofemora reddish brown; pro- and mesotibiae brown with irregular yellowish basal ring, broad yellow ring slightly distally to mid-length and distal portion black-brown; pro- and mesotarsomeres black. Metafemora pale brown, paler than pro- and mesofemora; metatibiae yellow-brown; metatarsomeres brown. Metatibiotarsal formula: (6–7) 7/8/5.

Abdomen: ( Fig. 6 A, C ) bright red dorsally; brown ventrally.

Male genitalia: ( Fig. 7 ) pygofer, anal tube and gonostyli orange; pygofer much higher than long in lateral view, with posterior margin curved in lateral view and with blunt dorsolateral process directed laterodorsally and slightly posteriorly. Anal tube elongate, 1.66 times longer

17 than broad in dorsal view, broader at distal 2/3; dorsal margin nearly straight in lateral view and abruptly curved ventrally near apex; apicoventral angle rounded in lateral view; lateral margins bisinuate in dorsal view, slightly emarginate on distal 1/3; apical margin excavate in dorsal view, apicolateral angles rounded in dorsal view; in posterior view, dorsal margin rounded, lateral margins slightly sinuate, ventral margin bisinuate and lateral lamina visible on a distance. Gonostyli elongate, subrectangular with posterior half slightly wider and dorsal margin weakly excavate on basal half in lateral view; strong lateral tooth directed lateroventrally at about half-length, bearing secondary small tooth at mid-length; apical margin nearly straight medially in lateral view. Aedeagus with endosomal process incurved distally in dorsal view, sinuate and curved ventrally on distal portion in lateral view; in dorsal view, strongly widening laterally on distal 1/3 due to lateral lamina; lamina not reaching apex and with 5 weak teeth laterally on distal half; inner margin strongly notched before apex; in lateral view, dorsal laminate crest ended in a tooth before apex, laterodorsal lamina incurved and apex rounded; phallus at rest about 2.1 times longer than broad.

DISTRIBUTION. Cambodia: Koh Kong Province ( Fig. 4 ).

Figures

Fig. 4. Polydictya spp. nov. and P. chantrainei Nagai & Porion, 2004, distribution map.

Fig. 6. Polydictya khmera sp. nov., holotype ♂ (RBINS). A, habitus, dorsal view; B, head, pro- and mesonotum, dorsal view. C, habitus, ventral view. D, frons, normal view. E, habitus, lateral view. F, head and prothorax, lateral view.

Fig. 7. Polydictya khmera sp. nov., holotype ♂ (RBINS), genitalia. A, pygofer, anal tube and gonostylus, left lateral view. B, anal tube and pygofer, dorsal view. C, apex of anal tube, postero-dorsal view. D, aedeagus, lateral view. E, aedeagus, dorsal view. An, anal tube – EP, endosomal process of aedeagus – G, gonostylus – Py, pygofer.

Fig. 1. Polydictya chantrainei Nagai & Porion, 2004, ♂ from Chiang Mai, Thailand (MNHN). A, habitus, dorsal view; B, head, pro- and mesonotum, dorsal view. C, habitus, ventral view. D, frons, normal view. E, habitus, lateral view. F, head and prothorax, lateral view.

Fig. 18. Polydictya kuntzi Nagai & Porion, 2004, ♀ (MHNL). A, habitus, dorsal view; B, habitus, ventral view. C, head, pro- and mesonotum, dorsal view. D, frons, normal view. E, habitus, lateral view. F, label. G, head and thorax, lateral view.