Gnezdilovius, 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 : 15-19

Gnezdilovius gen. nov.

urn:lsid:zoobank.org:act:75C438A6-C66E-4718-8233-32E6D926FBC1

Fig. 9

Type species

Gergithus lineatus Kato, 1933 .

Diagnosis

This new genus is similar to Gergithoides and Hemisphaerius . It differs from the former by the following characters: 1) coryphe nearly quadrangular (in Gergithoides coryphe nearly subtriangular); 2) metope smooth without tubercles or median carina (in Gergithoides metope with a row of tubercles and median carina); 3) genital style with hind margin slightly convex, or nearly straight, or weakly concave in middle (in Gergithoides genital style with hind margin strongly concave in middle). The new genus differs from Hemisphaerius by the following characters: 1) body medium-sized, male body length varies from 4.0 to 7.0 mm, most often length range from 5.0 to 6.5 mm (in Hemisphaerius body small, male body length varies from 3.0 to 4.6 mm); 2) hind wing well-developed, longer than half length of tegmen, usually 0.7 times as long as tegmen (in Hemisphaerius hind wing shorter than half length of tegmen, about 0.3 times as long as tegmen); 3) aedeagus usually with variable processes (in Hemisphaerius aedeagus without any process, phallobasal lobes with variable shape).

Etymology

Named after Dr. Vladimir M. Gnezdilov, who is a great specialist in systematic research of the family Issidae . The name is masculine.

Description

HEAD AND THORAX. Coryphe 2.4 times as wide as long, disc depressed, without carina ( Fig. 9A, F ). Metope with disc slightly elevated, without median carina, almost as long in midline as at widest point below level of antennae ( Fig. 9 C–D). Clypeus not angulate, always in same plane as metope ( Fig. 9 C–D). Rostrum long, reaching metatrochanter. Pronotum slightly longer than coryphe ( Fig. 9A, F ). Mesonotum smooth, disc slightly elevated. Tegmen elliptical, strongly convex and without claval suture, apical margin usually acutely rounded, longitudinal veins usually weakly prominent or inconspicuous ( Fig. 9B, E ). Hind wing well-developed, reticulate, more than half length of tegmen. Legs relative long, hind tibia with two lateral spines. Metatibiotarsal formula (6–9)/(8–16)/2.

MALE GENITALIA. Anal tube subtriangular, mushroom-shaped or cup-shaped. Pygofer in lateral view with hind margin roundly or spinously produced caudad. Phallobase with dorsal lobe usually reflexed at apex. Aedeagus with processes. Genital style with caudo-dorsal angle rounded, hind margin slightly convex, or nearly straight, or weakly concave in middle. Capitulum of style short, in caudal view with apical margin obtuse or acute, with small processes, lateral tooth spinule-shaped.

FEMALE GENITALIA. Sternum VII with middle of posterior margin clearly convex or concave. Anal tube nearly ovate in dorsal view, base wider than apex. Paraproct short. Gonoplac slightly elevated in median area, border between first and second gonoplac lobes obsolete, third gonoplac lobes faintly sclerotized and pigmented. Proximal part of posterior connective lamina of gonapophyses IX convex in lateral view, median field with notch in apical part. Gonocoxa VIII nearly rectangular, dorsal margin slightly protruding in proximal part. Anterior connective lamina of gonapophysis VIII with three teeth in apical group and with two to four carinate teeth in lateral group.

Distribution

China (Hainan, Yunnan, Guangxi, Guangdong, Hong Kong, Fujian, Taiwan, Zhejiang, Guizhou, Chongqing), Japan, Vietnam.

Remarks

The new genus can be distinguished by the wide coryphe (more than twice as wide as long), metope almost as long as wide, clypeus small and compressed and hind wing well developed.

Forty species are here transfered to Gnezdilovius gen. nov. from Gergithus , of which we have examined type specimens of 11 species in NWAFU and specimens of several species in BMNH, where paratypes are present of G. chihpensis , G. rosticus and G. pendulus and syntypes of G. flavimaculata . All other species are known to us only by their descriptions and illustrations. Images are provided of G. lineatus (type species) based on specimens collected in Taiwan and deposited in NWAFU ( Fig. 9 D–F).

Checklist of species of Gnezdilovius gen. nov.

Specimens deposited in BMNH indicated by * and in NWAFU by **:

* G. affinis ( Schumacher, 1915) comb. nov. As Gergithus affinis Schumacher, 1915: 135 , China (Taiwan); Hori 1969: 55, fig. 2: 12–13, pl. 2 fig. 13; Chan & Yang 1994: 23, fig. 6

** G. bimaculatus ( Zhang & Che, 2009) comb. nov. As Gergithus bimaculatus Zhang & Che, 2009: 185 , figs 16–27, China (Yunnan); Meng & Wang 2012: 11, figs 43–64

* G. bistriatus ( Schumacher, 1915) comb. nov. As Gergithus bistriatus Schumacher, 1915: 136 , China (Taiwan); Chan & Yang 1994: 31, fig. 11

G. carbonarius ( Melichar, 1906) comb. nov. As Gergithus carbonarius Melichar , 906: 65, China (Taiwan), Japan; Chan & Yang 1994: 29, fig. 90

** G. chelatus ( Che, Zhang & Wang, 2007) comb. nov. As Gergithus chelatus Che, Zhang & Wang, 2007: 617 , figs 24–32, China (Hainan)

* G. chihpensis ( Chan & Yang, 1994) comb. nov. As Gergithus chihpensis Chan & Yang, 1994: 38 , fig. 14, China (Taiwan)

G. flaviguttatus ( Hori, 1969) comb. nov. As Gergithus flaviguttatus Hori, 1969: 56 , pl. 2: 16, China (Taiwan), Japan

* G. flavimacula ( Walker, 1851) comb. nov. As Hemisphaerius flavimacula Walker, 1851: 378 , China ( Hong Kong); Butler 1875: 98, pl. IV, fig. 19

* G. formosanus ( Metcalf, 1955) comb. nov. As Gergithus formosanus Metcalf, 1955: 263 , China (Taiwan), Japan; Chan & Yang 1994: 38, fig. 15

G. gravidus ( Melichar, 1906) comb. nov. As Gergithus gravidus Melichar, 1906: 61 , China (Guangxi), Vietnam; Che et al. 2007: 612, figs 1–4; Chen et al. 2014: 52, fig. 2-15A–I

G. horishanus ( Matsumura, 1916) comb. nov. As Gergithus horishanus Matsumura, 1916: 102 , China (Taiwan); Hori 1969: 56, pl. 2: 12

G. hosticus ( Chan & Yang, 1994) comb. nov. As Gergithus hosticus Chan & Yang, 1994: 31 , fig. 10, China (Taiwan)

G. iguchii ( Matsumura, 1916) comb. nov. As Gergithus iguchii Matsumura, 1916: 98 , China (Zhejiang, Fujian, Guangdong), Japan, Vietnam; Hori 1969: 60, fig. 2: 1–4, pl. 2 fig. 6; Chen et al. 2014: 52, fig. 2–16A–I

* G. lineatus ( Kato, 1933) comb. nov. As Gergithus lineatus Kato, 1933: 461 (type species), China (Taiwan), Japan; Chan & Yang 1994: 43, fig. 17 ( Fig. 9 D–F)

G. longulus ( Schumacher, 1915) comb. nov. As Gergithus longulus Schumacher, 1915: 135 , China (Taiwan), Japan; Hori 1969: 56, pl. 2 fig. 14; Chan & Yang 1994: 47, fig. 20

G. luteomaculatus ( Constant & Pham, 2016) comb. nov. As Gergithus luteomaculatus Constant & Pham, 2016: 6 , figs 1, 2A–B, 3–4, Vietnam

** G. multipunctatus ( Che, Zhang & Wang, 2007) comb. nov. As Gergithus multipunctatus Che, Zhang & Wang, 2007: 621 , China (Hainan); Constant & Pham 2016: 9, figs 1, 2C–D ( Fig. 9 A–C)

* G. nigrolimbatus ( Schumacher, 1915) comb. nov. As Gergithus nigrolimbatus Schumacher, 1915: 134 , China (Taiwan); Chan & Yang 1994: 45, fig. 18

** G. nonomaculatus ( Meng & Wang, 2012) comb. nov. As Gergithus nonomaculatus Meng & Wang, 2012: 5 , figs 1–5, China (Hainan); Co nstant & Pham 2016: 10, figs 2E–F ( Figs 1 , 2 E–F)

* G. nummarius ( Chan & Yang, 1994) comb. nov. As Gergithus nummarius Chan & Yang, 1994: 23 , fig. 7, China (Taiwan)

G. okinawanus ( Matsumura, 1936) comb. nov. As Gergithus okinawanus Matsumura, 1936: 82 , Japan; Hori 1969: 55, fig. 1: 1–3, pl. 2 fig. 10

** G. parallelus ( Che, Zhang & Wang, 2007) comb. nov. As Gergithus parallelus Che, Zhang & Wang, 2007: 619 , figs 33–41, China (Hainan)

* G. pendulus ( Chan & Yang, 1994) comb. nov. As Gergithus pendulus Chan & Yang, 1994: 47 , fig. 7, China (Taiwan)

** G. pseudotessellatus ( Che, Zhang & Wang, 2007) comb. nov. As Gergithus pseudotessellatus Che, Zhang & Wang, 2007: 623 , figs 51–59, China (Hainan); Chen et al. 2014: 55, fig. 2-18A–I

** G. quinquemaculatus ( Che, Zhang & Wang, 2007) comb. nov. As Gergithus quinquemaculatus Che, Zhang & Wang, 2007: 615 , figs 5–13, China (Guangxi, Guizhou); Chen et al. 2014: 58, fig. 2-19A–I

G. robustus ( Schumacher, 1915) comb. nov. As Gergithus robustus Schumecher, 1915: 127 , China (Taiwan); Hori 1969: 56, pl. 2 fig. 15; Chan & Yang 1994: 50, fig. 21

* G. rosticus ( Chan & Yang, 1994) comb. nov. As Gergithus rosticus Chan & Yang, 1994: 34 , fig. 12, China (Taiwan)

G. rotundus ( Chan & Yang, 1994) comb. nov. As Gergithus rotundus Chan & Yang, 1994: 36 , fig. 12, China (Taiwan)

** G. rugiformis ( Zhang & Che, 2009) comb. nov. As Gergithus rugiformis Zhang & Che, 2009: 183 , figs 1–15, China (Chongqing, Guangxi)

G. satsumensis ( Matsumura, 1916) comb. nov. As Gergithus satsumensis Matsumura, 1916: 101 , Japan; Hori 1969: 52, fig. 1: 4–6, pl. 2 figs 5–8

** G. spinosus ( Che, Zhang & Wang, 2007) comb. nov. As Gergithus spinosus Che, Zhang & Wang, 2007: 615 , figs 14–23, China (Hainan)

G. stramineus ( Hori, 1969) comb. nov. As Gergithus stramineus Hori, 1969: 58 , pl 3 fig. 3, China (Taiwan)

G. taiwanensis ( Hori, 1969) comb. nov. As Gergithus taiwanensis Hori, 1969: 54 , fig. 1: 7–9, pl. 2 fig. 9, China (Taiwan)

G. tamdao ( Constant & Pham, 2016) comb. nov. As Gergithus tamdao Constant & Pham, 2016: 11 , figs 1, 2G–H, 5–6, Vietnam

G. tessellatus ( Matsumura, 1916) comb. nov. As Gergithus tessellatus Matsumura, 1916: 102 , China (Zhejiang, Fujian, Taiwan), Japan; Chan & Yang 1994: 50, fig. 21; Meng & Wang 2012: 11, figs 65–73; Chen et al. 2014: 60, fig. 2-20A–I

** G. tristriatus ( Meng & Wang, 2012) comb. nov. As Gergithus tristriatus Meng & Wang, 2012: 8 , figs 19–38, 40, 42, China (Yunnan)

* G. unicolor ( Melichar, 1906) comb. nov. As Gergithus unicolor Melichar, 1906: 66 , China (Taiwan); Chan & Yang 1994: 27, fig. 8

G. variabilis ( Butler, 1875) comb. nov. As Hemisphaerius variabilis Butler, 1875: 98 , 99, pl. IV, fig. 21, China ( Hong Kong)

* G. yayeyamensis ( Hori, 1969) comb. nov. As Gergithus yayeyamensis Hori, 1969: 55 , fig. 1: 10–11, pl. 2 fig. 11, China ( Taiwan, Japan)

** G. yunnanensis ( Che, Zhang & Wang, 2007) comb. nov. As Gergithus yunnanensis Che, Zhang & Wang, 2007: 625 , figs 60–67, China (Yunnan)

Figures

Fig. 9. Gnezdilovius spp. A–C. Gnezdilovius multipunctatus (Che, Zhang & Wang, 2007) comb. nov., paratype. A. Habitus, dorsal view. B. Habitus, lateral view. C. Metope and clypeus, facial view. — D–F. Gnezdilovius lineatus (Kato, 1933) comb. nov. D. Metope and clypeus, facial view. E. Habitus, lateral view. F. Habitus, dorsal view. Scale bars = 1 mm.

Fig. 1. Hemisphaerini. A–B. Macrodaruma pertinax Fennah, 1978. A. Habitus, dorsal view. B. Habitus, ventral view. — C–D. Neogergithoides tubercularis Sun, Meng & Wang, 2012. C. Habitus, dorsal view. D. Metope and clypeus, facial view. — E–F. Choutagus longicephalus Zhang, Wang & Che, 2006. E. Habitus, dorsal view. F. Habitus, ventral view. — G–H. Gergithoides carinatifrons Schumacher, 1915. G. Habitus, ventral view. H. Habitus, dorsal view. — I–J. Hemisphaerius lysanias Fennah, 1978. I. Habitus, dorsal view. J. Metope and clypeus, facial view. — K–L. Rotundiforma nigrimaculata Meng, Wang & Qin, 2013. K. Habitus, dorsal view. L. Metope and clypeus, facial view. Scale bar = 1 mm.

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.