Gergithus (Maculergithus) luteomaculatus, Constant & Pham, 2016

Constant, Jérôme & Pham, Hong-Thai, 2016, Maculergithus, a new subgenus in Gergithus Schumacher, 1915 with two new species from northern Vietnam (Hemiptera: Fulgoromorpha: Issidae), European Journal of Taxonomy 198, pp. 1-16 : 6-9

Gergithus (Maculergithus) luteomaculatus subgen. et sp. nov.

urn:lsid:zoobank.org:act:8E0B399D-54DE-4657-8150-299082810E09

Figs 1 , 2 A–B, 3–4

Diagnosis

The species can be recognized by the following combination of characters: (1) frons with a yellow spot along dorsal margin; (2) vertex yellow; (3) 2 yellow spots on tegmina along sutural margin; (4) tegmina with 8 yellow spots in total.

Etymology

The species epithet is formed by the juxtaposition of luteus (adj., Latin) = yellow and maculatus (adj., Latin) = spotted. It refers to the yellow spots on the mesonotum and tegmina of the species.

Type material

Holotype

VIETNAM: Ƌ (dissected, Fig. 3 ): [Coll. I. R. Sc.N.B., Vietnam , Tam Dao N.P., 25–30.vii.2011, day collecting, Leg. J. Constant & J. Bresseel, I.G.: 31.933] ( RBINS).

Paratype

VIETNAM: ♀: [VP-VQG Tam Dao, R 900, 15/VII/01] ( VNMN).

Description

MEASUREMENTS AND RATIOS. LT: Ƌ (n = 1): 6.4 mm; ♀ (n = 1): 7.5 mm. Ratio BV/LV = 4.3; LF/BF = 0.85; LTg/BTg = 1.5.

HEAD. Vertex slightly excavate, bright yellow ( Fig. 3A ). Frons smooth and convex, largely visible from above, black-brown with broad transverse bright yellow band slightly above clypeo-frontal suture, and rounded bright yellow spot along dorsal margin, not reaching dorsolateral angles ( Fig. 3 A–D). Genae black-brown, bright yellow under antennae ( Fig. 3C ). Clypeus smooth, slightly carinate subapically, black-brown with medio-basal diffuse small brown patch ( Fig. 3B, D ). Labium dark brown, reaching median coxae, with last segment narrower and shorter than penultimate. Antennae black-brown. Scape very short; pedicel subglobulose, slightly elongate.

THORAX. Pronotum minutely punctured, with anterior margin slightly carinate behind head and 2 impressed points in middle; entirely black-brown ( Fig. 3A, C ). Mesonotum minutely punctured, with transverse carina along anterior margin; black-brown with round bright yellow spot on each side before lateral angle ( Fig. 3A ). Scutellum slightly wrinkled transversely ( Fig. 3A ). Tegulae black-brown ( Fig. 3A, C ).

TEGMINA. ( Fig. 3A, C ) Black-brown, elongate, minutely punctured, with external margin broadly rounded and apical margin rounded. Reticulum of veins very slightly visible. Eight bright yellow spots organized, from base to apex: 1, 1, 1, 1, 1, 2, 1, with 4 spots along costal margin and 2 spots along sutural margin.

HIND WINGS. ( Fig. 3E ) Brown, unilobed, with veins darker, slightly shorter than tegmina. Venation reticulate with main longitudinal veins distinct basally and numerous cross-veinlets. Costal margin strongly sinuate; sutural margin angularly rounded at mid-length and apical margin rounded.

LEGS. ( Fig. 3 A–D) Elongate and slender. Pro- and mesocoxae black; metacoxae dark brown. Femora brown. Protibiae black-brown, paler on internoventral face; mesotibiae brown with externoventral carina black; metatibiae yellow-brown with 2 lateral spines near apex and 6 apical spines. Protarsi dark brown; mesotarsi brown; metatarsi yellow-brown. Metatibotarsal formula: (2) 6/7/2.

Male genitalia

Pygofer higher than broad and with posterior margin strongly sinuate and roundly projecting in middle in lateral view, and strongly narrowing dorsally ( Fig. 4A ). Gonostyli longer than high in lateral view ( Fig. 4A ) with capitulum well developed; capitulum apically laminate and projecting anterointernally; lateral spine of capitulum acute, hooked and projecting anteroventrally; ventroapical margin of gonostyli rounded in lateral view ( Fig. 4A, C ). Anal tube 1.45 times longer in median line than broad, dorsoventrally flattened and curved ventrally on posterior half; sides broadly rounded and apex truncate in middle ( Fig. 4 A–B); posterolateral angles projecting posteroventrally ( Fig. 4 A–B). Aedeagus strongly asymmetrical with ventral lobe of phallobase elongate, parallel-sided, slightly concave internally and roundly truncate apically ( Fig. 4D, F ). Lateroapical processes of phallobase elongate and spinose, nearly reaching apex of phallus; right process emarginate laterally towards apex ( Fig. 4 D–F). Left ventrolateral lobe of phallobase laminate and projecting laterally with 3 pointed processes projecting anterolaterally, the median one more developed, and another, more posterior pointed process projecting laterally ( Fig. 4 D–E). Small hook-shaped lateral process at basal half, on each side ( Fig. 4 D–F). Right lateral lobe of phallobase laminate, slightly concave internally ( Fig. 4F ).

Distribution

Known from Vietnam, Vinh Phuc province, Tam Dao National Park. See map Fig. 1 .

Biology

The specimens were collected on lower vegetation, in moist evergreen low mountain forest at an altitude around 1,000 m above sea level.

Figures

Fig. 1. Distribution map of the species of Gergithus (Maculergithus) subgen. nov. in North Vietnam and Hainan.

Fig. 2. Gergithus (Maculergithus) subgen. nov., schema of maculation of frons and left tegmen. A–B. Gergithus (Maculergithus) luteomaculatus subgen. et sp. nov. C–D. Gergithus (Maculergithus) multipunctatus Che, Zhang & Wang, 2007. E–F. Gergithus (Maculergithus) nonomaculatus Meng & Wang, 2012. G–H. Gergithus (Maculergithus) tamdao subgen. et sp. nov. I–J. Gergithus (Maculergithus) sp. (drawings by J. Caudron, RBINS; C–F, I–J based on illustrations of original descriptions).

Fig. 3. Gergithus (Maculergithus) luteomaculatus subgen. et sp. nov., holotype, Ƌ, total length: 6.4 mm. A. Habitus, dorsal view. B. Habitus, ventral view. C. Habitus, lateral view. D. Habitus, frontal view. E. Right hind wing. F. Label.

Fig. 4. Gergithus (Maculergithus) luteomaculatus subgen. et sp. nov., holotype, male genitalia. A. Pygofer, anal tube and gonostyli, left lateral view. B. Anal tube, dorsal view. C. Left gonostylus, posterior view. D. Aedeagus, postero-ventral view. E. Aedeagus, left lateral view. F. Aedeagus, right lateral view. Abbreviations: An = anal tube; G = gonostyli; Py = pygofer. Scale bars: 1 mm.