Thaia (Thaia) Ghauri, 1962

Cao, Yanghui, Dmitriev, Dmitry A., Dietrich, Christopher H. & Zhang, Yalin, 2020, Review of the leafhopper genus Thaia Ghauri and related genera (Hemiptera: Cicadellidae: Typhlocybinae: Erythroneurini), Zootaxa 4868 (3), pp. 331-367 : 350-351

publication ID	https://doi.org/ 10.11646/zootaxa.4868.3.2
publication LSID	lsid:zoobank.org:pub:256D29E7-5148-415C-AD06-5F1F6D986887
DOI	https://doi.org/10.5281/zenodo.4441041
persistent identifier	https://treatment.plazi.org/id/03998E57-FFCC-FFFA-8B84-FC7CFF0FBE22
treatment provided by	Plazi
scientific name	Thaia (Thaia) Ghauri, 1962
status

Treatment

Thaia (Thaia) Ghauri, 1962 View in CoL

Thaia Ghauri, 1962: 253 View in CoL ; Dworakowska, 1970: 87; Chiang & Knight, 1990: 246; Song & Li, 2008: 334

Hardiana Mahmood, 1967: 14 View in CoL , synonymized by Dworakowska, 1970

Type species: Thaia oryzivora Ghauri, 1962 View in CoL , by original designation

Description. Head as wide as or slightly narrower than pronotum, crown fore margin subparallel to posterior margin, coronal suture distinct. Face convex in profile, anteclypeus broad and short, lorum large. Pronotum with pair of large triangular impressions. Forewing with first and third apical cell wide, second and fourth apical cell narrow, fourth apical cell not extended to apex of wing, almost as long as third. Hind wing venation usual for Erythroneurini, RA vein present.

Male abdominal apodeme 2S small, usually not extended to hind margin of sternite III. Anal tube well sclerotized, with well-developed basal appendages, usually extended from dorso-basal part or on the cephalic segment of anal tube, slim and hooked.

Male genital capsule spherical, pygofer lobe well sclerotized except area between lobe and ventral appendage membranous, setosity rudimentary; dorsal appendage absent; ventral appendage extended from ventro-caudal angle of lobe and fused to it, directed inwards, greatly expanded basally, forming large base, apical part usually narrow. Subgenital plate wide basally and narrowing towards apex, distal disc expanded vertically, sometimes forming small tooth-like process on dorsal margin subapically, with 5 to numerous macrosetae near outer margin, with row of rigid setae along lateral margin and some setae scattered on distal disc. Style slender apically, preapical lobe well developed, triangular or slightly hooked. Connective lamellate, with or without central lobe. Aedeagal shaft very long, apex papillose or not, atrium developed but short, many species with pair of long lamellate atrial processes dorso-basally; dorsal apodeme small to large, usually transversely expanded; preatrium short; gonopore terminal.

Remarks. This subgenus currently consists of 22 species, which vary in the shape and position of the anal tube appendage, the shape of the pygofer ventral appendage and the aedeagus. The generic characteristics are described based on the T. subrufa group, including T. oryzivora , T. assamensis , T. ghaurii , T. longipenia , T. thaiosimilis , T. subrufa , T. variegata , T. barbata and T. nigra . The T. orientalis group, containing T. confusa , T. orientalis and T. similis , resembles the type species group, but the anal tube appendage is curved cephalad, the pygofer ventral appendage lacks an expanded base and the aedeagus has a much longer preatrium. T. balbinae is also similar to the T. subrufa group, but the anal tube appendage is very broad and the subgenital plate is entirely flattened. The other species seem quite different from typical Thaia species. However, since the holotypes of these questionable species were not studied, they are here retained in Thaia . Further study of these previously described species is needed to improve their classification.

Distribution. Bangladesh; Burma; China; Republic of Congo; India; Indonesia; Japan; Java; Malaysia; Pakistan; Sri Lanka; Thailand; Vietnam.

Diagnosis. This subgenus is most similar to Etmaria gen. n., but the anal tube appendage usually arises from the base, the pygofer lobe is not divided into a basal sclerite and apical membrane, the pygofer ventral appendage is fused to the ventro-caudal angle or the entire hind margin of the lobe, the subgenital plate usually has more macrosetae and the aedeagus has a shorter atrium and longer shaft.

Species checklist of Thaia (Thaia)

T. (T.) albida Dworakowska, 1980

T. (T.) assamensis ( Mahmood, 1967)

T. (T.) balbinae Dworakowska, 1972

T. (T.) barbata Dworakowska, 1979

T. (T.) bifurcata ( Li & Wang, 1991)

T. (T.) confusa Dworakowska, 1976

T. (T.) ghaurii Dworakowska, 1970

T. (T.) lincanga Song & Li, 2014

T. (T.) longipenia Thapa & Sohi, 1982

T. (T.) nigra Dworakowska, 1970

T. (T.) orientalis Dworakowska, 1970