Gergithus frontilongus, Meng & Webb & Wang, 2017

Meng, Rui, Webb, Michael Donald & Wang, Ying-Lun, 2017, Nomenclatural changes in the planthopper tribe Hemisphaeriini (Hemiptera: Fulgoromorpha: Issidae), with the description of a new genus and a new species, European Journal of Taxonomy 298, pp. 1-25 : 6-10

Gergithus frontilongus sp. nov.

urn:lsid:zoobank.org:act:4C95A579-8E80-4E3B-B79D-3D9B02DAE36E

Figs 2–4 , 7 E–F

Diagnosis

This new species can be distinguished from other congeners by its distinct colouration (see description). In general coloration it comes closest to G. complicatus , but can be distinguished by: 1) coryphe flavous with two black spots (in G. complicatus , coryphe ochreous with four castaneous spots); 2) metope and clypeus not concolorous, metope with red central fascia, clypeus with flavous central fascia (in G. complicatus , metope and clypeus concolorous, central fascia ochreous).

Etymology

The specific epithet is constituted from the Latin words “ frons- ” and “ longus ”, referring to the elongate metope.

Material examined

Holotype

CHINA: ♂, Xishuangbanna City , Menglun, Botanical Garden, 21º54.710′ N, 101º16.941′ E, 652 m, 16 Nov. 2009, Guo Tang and Zhiyuan Yao leg. ( NWAFU).

Paratypes

CHINA: 1 ♂, 2 ♀♀, Xishuangbanna City, Menglun , 21º54.459′ N, 101º16.750′ E, 640 m, 20 Nov. 2009, Guo Tang and Zhiyuan Yao leg.; 1 ♂, Xishuangbanna City , Menglun , Botanical Garden , 21º54.05′ N, 101º16.898′ E, 656 m, 13 Nov. 2009, Guo Tang and Zhiyuan Yao leg.; 5 ♂♂, 5 ♀♀, Xishuangbanna City , Menglun , Botanical Garden , 21º54.617′ N, 101º16.843′ E, 738± 17 m, 8 Aug. 2011, Guo Zheng leg., collected by canopy fogging (all in NWAFU, 1 ♂ and 1 ♀ collected by Guo Zheng in BMNH).

Description

MEASUREMENTS. Male length (N = 8) (including tegmen): 4.8–5.5 mm, length of tegmen: 3.9–4.6 mm; female length (N = 7) (including tegmen): 5.1–5.6 mm, length of tegmen: 4.1–4.6 mm.

COLOURATION. Body alternating luteotestaceous and black, with large black irregular maculations. Coryphe yellow, with two black speckles. Metope flavescent on both sides, with two lateral black fasciae and central red fascia. Gena flavescent with fuscous speckle. Clypeus with postclypeus same color pattern as metope, but central fascia fulvous, anteclypeus black. Eyes pale red or rufous. Pronotum yellow with fuscous speckles in middle, lateral lobes dark brown. Mesonotum flavous, with median carina, central pits and tip fuscous. Tegmen with wide fuscous fascia from basal one third of costal margin to posterior margin, connected with large subtriangulate fuscous macula after fascia and enclosing pale yellow spot, relatively short and narrow fuscous fascia near distal one third, with series of irregular infuscate speckles at gaps of pale veins. Hind wing pale brown, veins fuscous. Legs fulvous with black stripes, tips of teeth black. Abdomen fulvous ( Fig. 2 A–G).

HEAD AND THORAX. Coryphe 1.3 times as wide between basal angles as median length, median carina present ( Fig. 2A ). Metope about 3.5 times as long in middle as width at upper margin, 2.0 times as wide at widest part below antennae as at narrowest upper margin ( Fig. 2C ). Mesonotum large, 2.6 times as long as pronotum in midline, approximately 2.5 times as wide at anterior margin as long in midline, median carina weak ( Fig. 2A ). Tegmen ovate-oblong, approximately 2.0 times as long in midline as wide at widest part; costal margin moderately convex at basal one third, apical margin acutely rounded, postclaval margin straight; postcostal cell very wide, basal cell moderately long; longitudinal veins distinctly multiramose throughout wing, with transverse veins more dense in basal third of wing ( Fig. 2F ). Hind wing veins net-like ( Fig. 2G ). Legs with fore femora roundly convex at apex, mid femora deeply concave subapically and roundly convex apically ( Fig. 2E ). Metatibiotarsal formula 6–11–2 ( Fig. 2G ).

MALE GENITALIA. Anal tube nearly ovate in dorsal view, slightly longer than wide in midline, narrow at base, gradually widening to middle, semicircular at distal half, apical margin rounded ( Fig. 3A ). Paraproct digitate, 0.4 times as long as anal tube ( Fig. 3A ). Pygofer narrow, hind margin slightly roundly produced near dorsal margin ( Fig. 3B ). Dorso-lateral phallobasal lobes asymmetrical, distal part membranous, and furcated into two lobes laterally, obtusely concave dorsally; ventral phallobasal lobe large, longer than dorsolateral phallobasal lobe, right side clearly wider than left side in ventral view, apical part membranous and in form of two lobes, lobes pointed apically. Aedeagus without ventral hooks ( Fig. 3 D–F). Gonostyle stout, hind margin emarginate medially, anterior margin moderately convex at middle, caudo-dorsal angle rounded ( Fig. 3B ); capitulum of style long and thin, with a large lateral tooth and a small sharp apical process ( Fig. 3C ).

FEMALE GENITALIA. Anal tube peach-shaped in dorsal view, apical margin convex and with small angle at middle ( Fig. 4C ). Paraproct 0.3 times as long as anal tube ( Fig. 4C ). Gonoplac with disc relatively flat, nearly quadrate in lateral view, apical margin round and with wide membranous part, third gonoplac lobes fused at base, fork strongly sclerotized in dorsal view ( Fig. 4 A–B). Proximal part of posterior connective lamina of gonapophyses IX slightly protruded, distal part angularly convex near apex, median field divided into two lobes in dorsal view, and morderatly elevated medially in lateral view ( Fig. 4 D–E). Gonospiculum bridge moderately large, basal part nearly same length as apical part ( Fig. 4D ). Anterior connective laminae of gonapophysis VIII broad, with three small teeth in apical group and three keeled teeth in lateral group ( Fig. 4F ). Gonocoxae VIII with hind margin concave ( Fig. 4F ). Sternite VII with hind margin slightly widely convex at middle part ( Fig. 4G ).

Figures

Fig. 2. Gergithus frontilongus sp. nov. A. Habitus, dorsal view. B. Habitus, lateral view. C. Metope and clypeus, facial view. D. Metope and clypeus, lateral view. E. Fore leg, mid leg, hind leg. F. Tegmen. G. Hind wing. Scale bars = 1 mm.

Fig. 3. Gergithus frontilongus sp. nov. A. Male anal tube, dorsal view. B. Male genitalia, lateral view. C. Capitulum of gonostyle, dorsal view. D. Phallobase, ventral view. E. Penis, left view. F. Penis, right view. Scale bars = 0.2 mm.

Fig. 4. Gergithus frontilongus sp. nov. A. Gonoplac, dorsal view. B. Gonoplac, right view. C. Female anal tube, dorsal view. D. Gonapophysis IX and gonaspiculum bridge, right view. E. Gonapophysis IX and gonaspiculum bridge, dorsal view. F. Gonocoxa VIII and gonapophysis VIII, right view. G. Sternum VII, ventral view. Scale bars = 0.2 mm.

Fig. 7. Hemisphaerini. A–D. Gergithus schaumi (Stål, 1855), syntype. A. Habitus, dorsal view. B. Habitus, lateral view. C. Metope and clypeus, facial view. D. Label. — E–F. Gergithus frontilongus sp. nov. E. Metope and clypeus, lateral view. F. Metope and clypeus, facial view. — G–H. Gnezdilovius iguchii (Matsumura, 1916) comb. nov. G. Metope and clypeus, lateral view. H. Metope and clypeus, facial view. Arrows points the anteclypeus angular or compressed.