Polydictya nami, 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 nami sp. nov.

urn:lsid:zoobank.org:act:262F9667-FB5B-44A2-866D-139D87B422DA

Figs 4 , 10–11

DIAGNOSIS. The species can be separated from all other Polydictya species by the following combination of characters: (1) tegmina uniformly coloured, black-brown with pale yellowish veins ( Fig. 10 A ); (2) posterior wings with short basal bright red marking extending to basal ¼ and followed by black area along costal margin ( Fig. 10 A ); (3) frons regularly rounded in dorsal view, not projecting anterodorsally ( Fig. 10 B, D ), yellow-brown ( Fig. 10 D ); (4) protibiae not laminate, brown ( Fig. 10 A, C ); (5) abdomen bright red dorsally ( Fig. 10 A ); (6) genital segments red.

The closest species is P. affinis Atkinson, 1889 (northeast India – Fig. 15 ) from which P. nami sp. nov. can be separated by characters (1): P. affinis shows the distal ¼ of tegmina yellowish brown concolorous with cells (cells brown contrasting with yellowish veins in P. nami sp. nov.), (2): P. affinis lacks a dark grey area after the basal red marking and (3): the frons is more strongly rounded anteriorly in dorsal view in P. affinis .

ETYMOLOGY. The species epithet is a patronym dedicated to Mr Ba Nam Nguyen, “Mr Nam”, our guide in Chu Mom Ray National Park, in acknowledgement for all his help and enthusiasm during our field work in this national park.

TYPE MATERIAL. VIETNAM: Holotype ♂ ( Fig. 10 – dissected): [Coll. I.R.Sc.N.B., Vietnam, Kon Tum prov., Chu Mom Ray N.P., 700-1200m, 20-25.vii.2018, GTI Project, 14°25’38”N 107°43’15”E, Leg. J. Constant, J. Bresseel & X. Vermeersch, I.G.: 33.769] ( RBINS).

DESCRIPTION.

Measurements and ratios: LT: ♂ (n = 1): 23.5 mm; LTg/BTg = 3.0; BV/LV = 7.3; LF/BF = 0.79.

Head: ( Fig. 10 B, D, F ) yellow-brown with clypeus slightly darker and genae slightly paler. Vertex slightly curved and deeply grooved transversely with lowest point in middle, with all 4 margins carinate and with one oblique carina in middle at each side of groove not reaching anterior and posterior margins; frons slightly visible from above, convex, smooth, subquadrate with impressed, S-shaped longitudinal groove along lateral margin, starting in front of eye; clypeus slightly narrower and shorter than frons; labium elongate, brown, surpassing metacoxae; antennae dark brown with scape cylindrical, elongate; pedicel bulbous. Thorax: ( Fig. 10 B, D, F ) yellow-brown; mesonotum darker than pronotum; pronotum with short median paler marking along anterior margin and one slightly paler area along anterior margin at each side behind eye; lateroventral lobes of pronotum slightly reddish; mesonotum with paler spot at each basal angle of scutellum; pro-, meso- and metasternites brown; pronotum rugulose with transverse wrinkles on anterior portion, median longitudinal carina obsolete, visible on posterior half, transverse groove in middle with deep impressed point at each side, small impressed points irregularly distributed on lateral fields of pronotum; mesonotum smooth with disc wrinkled, obsolete peridiscal carinae and an impressed point at each side of base of scutellum; scutellum slightly impressed and transversely wrinkled; tegulae yellow-brown; metanotum bright red.

22

23 Tegmina: ( Fig. 10 A, C, E ) membrane of basal joint red, ground colour black basally progressively turning to brown towards distal portion, all veins pale yellow brown; costal and sutural margins subparallel, apex obliquely rounded.

Posterior wings: ( Fig. 10 A, C ) translucent greyish brown with bright red area on basal ¼ not reaching anal margin and dark grey marking after red area along costal margin; veins concolorous with background in red area, darker than background colour in other parts; broader than tegmina.

24 Legs: ( Fig. 10 A, C ) elongate and slender with pro- and mesotibiae not foliaceaous. All legs uniform olivaceous brown with slightly reddish shade; tarsi slightly darker. Metatibiotarsal formula: (5) 7/9/6.

Abdomen: ( Fig. 10 A, C ) brigh red.

Male genitalia: ( Fig. 11 ) pygofer, anal tube and gonostyli red; pygofer higher than long, with posterior margin slightly sinuate in lateral view with ventral half straight along a large portion; anterior margin curved; dorsal portion of pygofer strongly shorter than ventral one. Anal tube rather massive and elongate, 1.97 times longer than broad in dorsal view, broader at about half of total length and with lateral laminae projecting lateroventrally; apical margin acute in lateral view, slightly notched in dorsal view; lateral margins slightly undulate in lateral view; in posterodorsal view, anal opening oval and lateral laminae visible to base. Gonostyli elongate, in lateral view with basidorsal lobe covered with short bristles, slightly narrowing from base to lateral tooth, then abruptly slightly widening and smoothly narrowing to rounded apex; lateral tooth strong and curved lateroventrally; ventral margin nearly straight on most of its length. Aedeagus with endosomal process bifid apically, strongly elongate, nearly straight in dorsal view, slightly sinuate in lateral view and with ventral portion of apical fork incurved; distal portion slightly widening in lateral view; dorsal portion of fork with inner margin concave, dorsal margin smooth in lateral view and ventral margin irregularly undulate; ventral portion of fork directed posteroventrally with dorsal margin curved and smooth and ventral margin denticulate; phallus strongly elongate, at rest about 3.4 times longer than broad.

DISTRIBUTION. Central Vietnam: Kon Tum Province ( Fig. 4 ).

Figures

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

Fig. 10. Polydictya nami 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. 11. Polydictya nami sp. nov., holotype ♂ (RBINS), genitalia. A, pygofer, anal tube and gonostylus, left lateral view. B, anal tube and pygofer, dorsal view. C, anal tube, postero-dorsal view. D, apical portion of endosomal process of aedeagus, posterolateral view. E, aedeagus, lateral view. F, aedeagus, dorsal view. An, anal tube – EP, endosomal process of aedeagus – G, gonostylus – Py, pygofer.

Fig. 15. Polydictya affinis Atkinson, 1885, holotype ♀ (BMNH). A, habitus, dorsal view; B, habitus, ventral view. C, head, pro- and mesonotum, dorsal view. D, frons, normal view. E, labels.