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

publication ID	https://doi.org/ 10.5852/ejt.2016.198
DOI	https://doi.org/10.5281/zenodo.3852320
persistent identifier	https://treatment.plazi.org/id/039D87EF-6F73-FF97-0CB0-FBC3FDC6F93C
treatment provided by	Valdenar
scientific name	Gergithus (Maculergithus) luteomaculatus
status	subgen. et sp. nov.

Treatment

Gergithus (Maculergithus) luteomaculatus View in CoL subgen. et sp. nov.

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

Figs 1 View Fig , 2 View Fig 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 View Fig ): [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 View Fig ). 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 View Fig A–D). Genae black-brown, bright yellow under antennae ( Fig. 3C View Fig ). Clypeus smooth, slightly carinate subapically, black-brown with medio-basal diffuse small brown patch ( Fig. 3B, D View Fig ). 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 View Fig ). Mesonotum minutely punctured, with transverse carina along anterior margin; black-brown with round bright yellow spot on each side before lateral angle ( Fig. 3A View Fig ). Scutellum slightly wrinkled transversely ( Fig. 3A View Fig ). Tegulae black-brown ( Fig. 3A, C View Fig ).

TEGMINA. ( Fig. 3A, C View Fig ) 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 View Fig ) 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 View Fig 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 View Fig ). Gonostyli longer than high in lateral view ( Fig. 4A View Fig ) 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 View Fig ). 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 View Fig A–B); posterolateral angles projecting posteroventrally ( Fig. 4 View Fig A–B). Aedeagus strongly asymmetrical with ventral lobe of phallobase elongate, parallel-sided, slightly concave internally and roundly truncate apically ( Fig. 4D, F View Fig ). Lateroapical processes of phallobase elongate and spinose, nearly reaching apex of phallus; right process emarginate laterally towards apex ( Fig. 4 View Fig 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 View Fig D–E). Small hook-shaped lateral process at basal half, on each side ( Fig. 4 View Fig D–F). Right lateral lobe of phallobase laminate, slightly concave internally ( Fig. 4F View Fig ).