Gergithus (Maculergithus) tamdao, 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 : 11-14

publication ID	https://doi.org/ 10.5852/ejt.2016.198
DOI	https://doi.org/10.5281/zenodo.3852322
persistent identifier	https://treatment.plazi.org/id/039D87EF-6F7C-FF92-0CC0-FE85FDCFFBB7
treatment provided by	Valdenar
scientific name	Gergithus (Maculergithus) tamdao
status	subgen. et sp. nov.

Treatment

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

urn:lsid:zoobank.org:act:4368D0A6-3C1D-42EB-91B2-59769EE60780

Figs 1 View Fig , 2 View Fig G–H, 5–6

Diagnosis

The species can be recognized on the following combination of characters: (1) frons with a yellow spot along dorsal margin; (2) vertex yellow; (3) 3 yellow spots on tegmina along sutural margin; (4) tegmina with 10 yellow spots in total.

Etymology

The species epithet refers to the type location, Tam Dao National Park in North Vietnam. It is used as a noun in apposition.

Type material

Holotype

VIETNAM: Ƌ (dissected, Fig. 5 View Fig ): [Coll. I. R. Sc.N.B., Vietnam , Tam Dao N.P., 21°31'N 105°33'E, 25– 30.vii.2011, day collecting, Leg. J. Constant & J. Bresseel, I.G.: 31.993] ( RBINS).

GoogleMaps

Paratype

VIETNAM: 1 ♀: same data as holotype ( VNMN).

Description

MEASUREMENTS AND RATIOS. LT: Ƌ (n = 1): 6.0 mm; ♀ (n = 1): 6.5 mm. Ratio BV/LV = 4.0; LF/BF = 0.84; LTg/BTg = 1.73.

HEAD. Vertex slightly excavate, bright yellow ( Fig.5A 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. 5 View Fig A–D). Genae black-brown, bright yellow under antennae ( Fig. 5C View Fig ). Clypeus smooth, slightly carinate subapically, black-brown ( Fig. 5B, 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. 5A, 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. 5A View Fig ). Scutellum slightly wrinkled transversely ( Fig. 5A View Fig ). Tegulae black-brown ( Fig. 5A, C View Fig ).

TEGMINA. ( Fig. 5A, C View Fig ) Black-brown, elongate, minutely punctured, with external margin and apical margins rounded. Reticulum of veins very slightly visible. Ten bright yellow spots organized, from base to apex: 1, 2, 1, 2, 1, 2, 1, with 4 spots along costal margin and 3 spots along sutural margin.

HIND WINGS. 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. ( Figs 5 View Fig A–D) Elongate and slender. Pro- and mesocoxae black; metacoxae yellow-brown. Femora yellow-brown. Protibiae yellow-brown with anterodorsal and anteroventral carinae black; mesotibiae yellow-brown with externoventral carina black; metatibiae yellow-brown with 2 lateral spines near apex and 6 apical spines. Protarsi yellow-brown; mesotarsi and metatarsi yellow. 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 emarginate dorsally ( Fig. 6A View Fig ). Gonostyli slightly longer than high in lateral view ( Fig. 6A View Fig ) with capitulum well developed; capitulum apically laminate and projecting anterointernally; lateral spine of capitulum acute, hooked and projecting lateroventrally; ventroapical margin of gonostyli rounded in lateral view ( Fig. 6A, C View Fig ). Anal tube 1.5 times longer in median line than broad, dorsoventrally flattened and curved ventrally on posterior half; sides broadly rounded and apex truncate in middle ( Fig. 6 View Fig A–B); posterolateral angles projecting posteroventrally ( Fig. 6 View Fig A–B). Aedeagus strongly asymmetrical with ventral lobe of phallobase elongate, parallel-sided, and roundly truncate apically ( Fig. 6D View Fig ). Lateroapical processes of phallobase elongate and spinose, nearly reaching apex of phallus; right process sinuate internally towards apex ( Fig. 6 View Fig D–F). Left ventrolateral lobe of phallobase laminate and projecting laterally with 2 pointed processes projecting anterolaterally, the dorsal one much more developed, and another more posterior pointed process projecting laterally ( Fig. 6 View Fig D–E). Rather long, spinose lateral process at basal half, on each side, projecting dorsoanteriorly ( Fig. 6 View Fig D–F). Right lateral lobe of phallobase laminate, slightly concave internally ( Fig. 6F View Fig ).