Eusarima Yang, 1994

Constant, Jérôme & Pham, Hong Thai, 2025, Issid planthoppers from Bach Ma and Phong Dien in Central Vietnam. (III) Tribe Sarimini (Hemiptera: Fulgoromorpha: Issidae), European Journal of Taxonomy 1025, pp. 1-109 : 57-58

Genus Eusarima Yang, 1994

Eusarima Yang in Chang & Yang, 1994: 108.

Type species

Eusarima contorta Yang, 1994 , by original designation.

Diagnosis

The genus Eusarima can be differentiated from the other genera of Sarimini by the following combination of characters, according to Gnezdilov (2013a) and Zhang et al. (2020): (1) the frons with distinct and complete median and peridiscal (sublateral) carinae, joining below upper margin (subgenus Eusarima ), or at level of upper margin (subgenus Nepalius Dlabola, 1997 ); (2) the vertex transverse, 1.6–2.0 × as wide as long; (3) the tegmina quite elongate, without epipleuron (= hypocostal plate) (subgenus Eusarima ), or with an epipleuron (= hypocostal plate) (subgenus Nepalius Dlabola, 1997 ); (4) the tegmina with veins ScP long, reaching over midlength of tegmen, RP and CuA with 2 branches each and MP with 2–4 branches; (5) the hind wings well developed, three-lobed; (6) the hind tibiae with two lateral spines; (7) the periandrium with a pair of subapical processes; (8) the aedeagus with pair of ventral hooks arising from its apical half and directed cephalad.

Remarks

The genus Eusarima contains two subgenera: Eusarima Yang, 1994 and Nepalius Dlabola, 1997 ( type species: Nepalius hellerianus Dlabola, 1997 ). Nepalius was synonymized under Eusarima by Gnezdilov (2009), and soon later, treated as a valid subgenus of Eusarima by Gnezdilov & Mozaffarian (2011). The two subgenera can be separated by the characters of the median and peridiscal carinae of the frons, fused under upper margin of frons in Eusarima , at level of upper margin in Nepalius , and the epipleuron (= hypocostal plate) of the tegmen, absent in Eusarima , and present in Nepalius ; Eusarima ( Eusarima) is recorded from China and Taiwan, and is here newly recorded from Vietnam, while Eusarima ( Nepalius) is known from Nepal and Iran ( Gnezdilov & Mozaffarian 2011).

The three species of Eusarima ( Eusarima) from Central Vietnam treated below differ from the other species in the subgenus by having the anterodorsal margin of the gonostylus weakly rounded, and not angularly curved at base of capitulum (compare with illustrations in Chan & Yang 1994: figs 45–72), and/or the subapical processes /dorsal spinose process ( dsp) of the periandrium arising very distally and reaching or surpassing level of dorsal and ventral lobes of periandrium. Hence, the three new species are compared between them in the differential diagnosis given in the correponding sections.

Species included

Eusarima bachmana sp. nov.

Eusarima boevei sp. nov.

Eusarima bourgoini sp. nov.