Gergithoides Schumacher, 1915

Constant, Jérôme & Pham, Hong Thai, 2025, Issid planthoppers from Bach Ma and Phong Dien in Central Vietnam: (II) Tribe Hemisphaeriini (Hemiptera: Fulgoromorpha: Issidae), European Journal of Taxonomy 994 (1), pp. 1-76 : 16-17

Genus Gergithoides Schumacher, 1915

Gergithoides Schumacher, 1915: 126 .

Type species: Gergithoides carinatifrons Schumacher, 1915 by monotypy.

Daruma Matsumura, 1916: 103 (preoccupied). Type species: Daruma nitobei Matsumura, 1916 , by original designation. Synonymized by Ishihara (1965: 208) under the erroneous spelling “ Darma ”.

Darumara Metcalf, 1952: 227 . New name for Daruma Matsumura, 1916 . Synonymized by Gnezdilov (2009: 85) [previously synonymized by Ishihara (1965)].

Darma Ishihara, 1965: 208 . Misspelling of Daruma .

Diagnosis

The definition of the genus extrapolated from the key to the genera of Hemisphaeriini provided by Sun et al. (2012) features the following distinctive set of characters:

(1) the hind wing longer than half length of tegmen;

(2) the frons with a complete median carina;

(3) the lateral margins of the frons not elevated;

(4) a row of tubercles along the lateral margins of the frons.

At species level, the shape of the bi- or trispinose lateral processes of the periandrium provides very stable and reliable characters.

The Vietnamese species of Gergithoides were treated in Constant & Pham (2017), and a species from North Vietnam was later added by the same authors ( Constant & Pham 2024a).

Species included

Gergithoides carinatifrons Schumacher, 1915

G. caudospinosus Chen, Zhang & Chang, 2014

G. devyveri sp. nov.

G. gibbosus Chou & Wang, 2003

G. gnezdilovi Constant & Pham, 2017

G. jejudoensis Rahman, Kwon & Suh, 2012

G. nui Constant & Pham, 2017

G. olivaceus Constant & Pham, 2024

G. rugulosus (Melichar, 1906)

G. undulatus Wang & Che, 2003

Remarks

The species of Gergithoides should be identified based on a comparison of the male terminalia with reliable illustrations. We explained in detail all pending issues in the identity of some species of Gergithoides , especially in the fauna of China ( Constant & Pham 2017), but those were not addressed in Zhang et al. (2020).