Gergithus Stål, 1870

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 : 5-6

publication ID

https://doi.org/ 10.5852/ejt.2017.298

DOI

https://doi.org/10.5281/zenodo.3846015

persistent identifier

https://treatment.plazi.org/id/03DA87E2-4F01-934A-70B8-FE29B92E04EE

treatment provided by

Carolina

scientific name

Gergithus Stål, 1870
status

 

Gergithus Stål, 1870 View in CoL View at ENA

Figs 1–7 View Fig View Fig View Fig View Fig View Fig View Fig View Fig

Gergithus Stål, 1870: 756 View in CoL .

Type species: Hemispharius schaumi Stål, 1855 View in CoL , by original designation.

Diagnosis

Coryphe subquadrate ( Figs 2A View Fig , 5A, D View Fig , 6A View Fig ), metope elongate ( Figs 2C View Fig , 5B, F View Fig , 6D View Fig , 7C View Fig ), postclypeus nearly triangular and in same oblique plane with metope, anteclypeus angular ( Figs 2D View Fig , 5C, E View Fig , 6B View Fig , 7B View Fig ) and tegmen with costal margin moderately convex at basal one third as “relief shoulder” ( Figs 2A View Fig , 5A View Fig , 6A View Fig , 7A View Fig ).

Redescription

Coryphe subquadrate, margins carinate, anterior margin straight or weakly concave, posterior margin weakly concave ( Figs 2A View Fig , 5A, D View Fig , 6C View Fig , 7A View Fig ). Metope greatly elongate, slightly widening below antennae; upper margin straight ( Figs 2C View Fig , 5B, F View Fig , 6D View Fig , 7C View Fig ). Metopoclypeal suture straight ( Figs 2C View Fig , 5B, F View Fig , 6D View Fig , 7C View Fig ). Postclypeus nearly triangular and in same oblique plane, with lateral margins continuous with those of metope; anteclypeus extremely narrow in ventral view, and roundly angulately protruding ventrally in lateral view ( Figs 2 View Fig C–D, 5B–C, E–F, 6B, D, 7B–C). Ocelli rudimentary. Pronotum clearly short, as long as coryphe in middle line or slightly shorter than it, extremely narrow behind eyes, margins obviously ridged; lateral lobes large, fan-shaped in frontal view, ventral margins moderately oblique, lateroventral angles obtusely convex ( Figs 2A, C View Fig , 5 View Fig A–B, D, F, 6C–D, 7A, C). Mesonotum with anterior margin obviously ridged and shallowly concave, with two rounded pits medially on each side ( Figs 2A View Fig , 5A, D View Fig , 6C View Fig , 7A View Fig ). Tegula small. Tegmen ovate-oblong, depressed at basal surface, costal margin moderately convex at basal one third as “relief shoulder”, longitudinal veins prominent, with many supernumerary branches and numerous irregular transverse veinlets; claval suture absent ( Figs 2F View Fig , 5 View Fig C–D, 6E, 7B). Hind wing mostly well-developed single lobe, veins netlike, sometimes reduced ( Fig. 2G View Fig ). Legs moderately long, not dilated; hind tibia with two spines distally.

Distribution

Sri Lanka, India, Burma, Thailand, China (Yunnan Province), Malaysia, Indonesia.

Remarks

From a total of 62 species previously included in the genus we transfer several species to a new genus described below and transfer G. contusus ( Walker, 1851) to Mongaliana. However, a detailed revision of the latter genus is needed in the future. Twenty two species are retained in Gergithus , most of them after examination of the type ( Butler 1875; Distant, 1906, 1916; Walker 1851) or of other specimens in the BMNH. Images of type specimens are provided for: G. schaumi ( Stål, 1855) ( Fig. 7 View Fig A–D), G. cribratus Melichar, 1906 ( Fig. 5 View Fig D–F) and G. signatifrons Melichar, 1906 ( Fig. 6 View Fig A–F). The species G. ignotus Melichar, 1906 , G. lineolatus Melichar, 1906 , G. pigrans Melichar, 1906 , G. secundus ( Melichar, 1903) and G. vidulus Melichar, 1906 are known by their original descriptions only.

Checklist of species of Gergithus Stål, 1870

Species in BMNH indicated by *:

* G. bipustulatus ( Walker, 1858) View in CoL . As Hemisphaerius bipustulatus Walker, 1858: 95 View in CoL , Sri Lanka

* G. complicatus Distant, 1916 View in CoL . Distant 1916: 103, fig. 77, Sri Lanka

* G. conspicularis Distant, 1916 View in CoL . Distant 1913: 103, Sri Lanka

* G. cribratus Melichar, 1906 View in CoL . Melichar 1906: 64, Sri Lanka ( Fig. 5 View Fig D–F)

* G. dubius ( Butler, 1875) View in CoL . As Hemisphaerius dubius Butler, 1875: 97 View in CoL , pl. IV, fig. 17, Sri Lanka

* G. elongates ( Distant, 1906) . As Hemisphaerius elongatus Distant, 1906: 362 View in CoL , India

* G. erebus Distant, 1916 View in CoL . Distant 1916: 101, fig. 76, India

G. frontilongus sp. nov., China (Yunnan) ( Figs 2–4 View Fig View Fig View Fig )

* G. herbaceous ( Kirby, 1891) View in CoL . As Hemisphaerius herbaceous Kirby, 1891: 147 , Sri Lanka

G. ignotus Melichar, 1906 View in CoL . Melichar 1906: 66, Burma

G. lineolatus Melichar, 1906 View in CoL . Melichar 1906: 60, Sumatra

* G. niger ( Walker, 1857) View in CoL . As Hemisphaerius niger Walker, 1857: 155 View in CoL , Indonesia, Malaysia, Thailand As Hemisphaerius walkeri Butler, 1875: 100 View in CoL , replacement name for Hemisphaerius chilocoroides Walker, 1862: 308 . Synomized by Liang (2001)

* G. nilgiriensis ( Distant, 1906) As View in CoL Hemisphaerius nilgiriensis Distant, 1906: 361 View in CoL , India

G. pigrans Melichar, 1906 View in CoL . Distant 1906: 64, Indonesia (Kei Island)

* G. proteus Distant, 1916 View in CoL . Distant 1916: 102, India

* G. reticulatus ( Distant, 1906) View in CoL . As Hemisphaerius reticulatus Distant, 1906: 361 View in CoL , India

* G. schaumi ( Stål, 1855) View in CoL . As Hemisphaerius schaumi Stål,1855: 191 View in CoL , Sri Lanka ( Fig. 7 View Fig A–D)

G. secundus ( Melichar, 1903) View in CoL . As Hemisphaerius secundus Melichar, 1903: 75 View in CoL , Sri Lanka

G. signatifrons Melichar, 1906 View in CoL . Melichar 1906: 60, Indonesia (Sumatra) ( Fig. 6 View Fig A–F)

* G. venosus ( Distant, 1906) View in CoL . As Hemisphaerius venosus Distant, 1906: 363 View in CoL , India

* G. versicolor Distant, 1916 View in CoL . Distant 1916: 102, Sri Lanka

G. vidulus Melichar, 1906 View in CoL . Melichar 1906: 62, India

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hemiptera

Family

Issidae

Loc

Gergithus Stål, 1870

Meng, Rui, Webb, Michael Donald & Wang, Ying-Lun 2017
2017
Loc

G. complicatus

Distant W. L. 1916: 103
1916
Loc

G. erebus

Distant W. L. 1916: 101
1916
Loc

G. proteus

Distant W. L. 1916: 102
1916
Loc

G. versicolor

Distant W. L. 1916: 102
1916
Loc

G. cribratus

Melichar D. L. 1906: 64
1906
Loc

G. elongates (

Distant W. L. 1906: 362
1906
Loc

G. ignotus

Melichar D. L. 1906: 66
1906
Loc

G. lineolatus

Melichar D. L. 1906: 60
1906
Loc

G. nilgiriensis ( Distant, 1906 )

Distant W. L. 1906: 361
1906
Loc

G. pigrans

Distant W. L. 1906: 64
1906
Loc

G. reticulatus (

Distant W. L. 1906: 361
1906
Loc

G. signatifrons

Melichar D. L. 1906: 60
1906
Loc

G. venosus (

Distant W. L. 1906: 363
1906
Loc

G. vidulus

Melichar D. L. 1906: 62
1906
Loc

G. secundus (

Melichar L. 1903: 75
1903
Loc

G. herbaceous (

Kirby W. F. 1891: 147
1891
Loc

G. dubius (

Butler A. G. 1875: 97
1875
Loc

Gergithus Stål, 1870: 756

Stal C. 1870: 756
1870
Loc

G. bipustulatus (

Walker F. 1858: 95
1858
Loc

G. niger (

Butler A. G. 1875: 100
Walker F. 1862: 308
Walker F. 1857: 155
1857
Loc

G. schaumi ( Stål, 1855 )

Stal C. 1855: 191
1855
Loc

G. conspicularis

Distant 1913: 103
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