Kosalya Distant, 1906

Long, Jian-Kun & Chen, Xiang-Sheng, 2013, Three new species of the genus Kosalya Distant, 1906 (Hemiptera: Fulgoromorpha: Achilidae) from China, Zootaxa 3683 (5), pp. 549-560 : 550

Kosalya Distant, 1906

Type species. Kosalya flavostrigata Distant, 1906: 292 , by original designation. Kosalya Distant, 1906: 292 ; Fennah, 1950: 72; Chen et al., 1989: 20.

Redescription. The distinctive characters used by Fennah (1950) and Chen et al. (1989) are modified as follows. Mesonotum often with large black markings between lateral carinae and smaller markings outside of each lateral carinae. Ratio width of head including eyes to width of pronotum 0.7. Ratio width of vertex across base to length in middle line 2–3. Ratio length of frons in middle line to maximum width 0.8–1.3, ratio maximum width to width at base 1.4–1.5. Ratio length of postclypeus in middle to length of frons 0.5–1.4. Rostrum almost reaching hind trochanters. Pronotum as long or longer behind eyes as in middle line, posterior margin angulately concave. Mesonotum longer than vertex and pronotum combined. Hind tibia with one lateral spine in basal third. Spinal formula of hind leg 7-6-6. Forewing with vein Sc+R forking slightly proximally, or distally, of Cu1 fork. Male genitalia. Pygofer with paired medioventral processes in ventral view. Genital style with two dorsad directed processes rising from dorsal margin. Phallobase in dorsal view asymmetrical, lateral areas sclerotized and diverging dorsally, bilateral lobes reduced to small, synclinally crossing pieces, apex slightly incised in middle, ventral lobe with row of spines in the middle. Ratio length of phallic appendage to length of phallobase 3–4, apical part of appendages distinctly shagreen especially dorsally, left appendage obtuse, with a large subapical spine beneath apex, right appendage pointed, with large apical spine.

Diagnosis. Kosalya is similar to Phypia Stål 1862 , but differs from the latter in: frontal and clypeal margins raised in a single unbroken curve ( Phypia not so); pygofer with paired medioventral processes ( Phypia with medioventral process entire). Kosalya may be distinguished from other Plectoderini by the following combination of features: mesonotum with two to six dark brown markings; frons strongly depressed between median and lateral carinae; phallobase in dorsal view asymmetrical, lateral areas sclerotized and diverging dorsally, bilateral lobes reduced to small synclinally crossing pieces, apex slightly incised in middle, ventral lobe with row of spines in the middle; left appendage obtuse, with a large subapical spine beneath apex, right appendage pointed, with large apical spine.

Distribution. Oriental region, Palaearctic region.