Eusarima formosana ( Schumacher, 1915 ) Gnezdilov, 2013

Gnezdilov, Vladimir M., 2013, New synonyms and combinations for the planthopper genus Eusarima (Hemiptera: Fulgoroidea: Issidae), Acta Entomologica Musei Nationalis Pragae 53 (2), pp. 485-492 : 489-491

Eusarima formosana ( Schumacher, 1915) comb. nov.

( Figs 5–6 , 11–16 )

Sarima formosana Schumacher, 1915: 137 .

Type locality. Taiwan (Taihorin).

Type material examined. LECTOTYPE ( SDEI, here designated): 1 J, “Taihorin, Fórmosa, H. Sauter, 1911” (printed), “7.VII.” (printed), “ Syntypus ” (red, printed), “ Sarima formosana * Schum. (handwritten) F. Schumacher det. (printed)”, “ Lectotype Sarima formosana Schumacher, 1915 Gnezdilov desig. 2013” (red, printed) . PARALECTOTYPE ( SDEI): 1 ♀, “Taihorin, Fórmosa, H. Sauter, 1911” (printed), “7.VII.” (printed), “Schumacher det.” (printed), “ Syntypus ” (red, printed).

Supplementary description. Male genitalia ( Figs 11–16 ). Hind margin of pygofer slightly convex ( Fig. 14 ). Anal tube long and narrow, rounded apically ( Fig. 13 ). Anal column short, as long as one quarter of anal tube length. Phallobase slightly curved (in lateral view), with a hook-shaped process on each side below the base of ventral aedeagal hooks ( Fig. 11 ). Ventral phallobase surface concave below ventral aedeagal hooks (from above). Ventral phallobase lobe widening apically ( Fig. 12 ). Apical aedeagal processes wide, as long as dorsal phallobase lobe. Ventral aedeagal hooks long, arising in apical half of aedeagus, narrowing apically. Style with slightly concave hind margin ( Fig. 15 ). Capitulum of style long, truncate apically (in dorsal view, Fig. 16 ), on short neck; apical tooth small, lateral tooth well developed. Margin of style under the capitulum convex (in lateral view).

Total length. Male – 5.5 mm.

Note. The species was described based on two specimens from Taiwan (Taihorin) (SCHU- MACHER 1915). Two examined syntypes (male and female) apparently belong to different species as they are very different in the pattern of face coloration (female has a crescent light band in the middle of the metope) and the shape of fore wings (the female has shorter wings). I designate here the male as the lectotype according to the ICZN (1999: Art. 74) to stabilize the nomenclature in the group.

Based on the structure of male genitalia E. formosana is closely related to (or even conspecific with) Eusarima arva Yang, 1994 in CHAN & YANG (1994, fig. 59). However, the lectotype of S. formosana differs in its face coloration – a light brown to yellowish postclypeus with two dark brown longitudinal stripes compared to an almost totally dark postclypeus, except near to metopoclypeal suture, in E. arva . The latter species was described based on two specimens (male and female), thus this difference in the face coloration between both species can be due to interspecific variability. Pending more material available and a further study, I prefer to treat E. formosana and E. arva as valid names.

Figures

Figs 1–6. Eusarima spp.: 1, 3, 5 – habitus, lateral view; 2, 4, 6 – face. 1–2 – E. koshunensis (Matsumura, 1916), female paralectotype; 3–4 – E. satsumana (Matsumura, 1916), female lectotype; 5–6 – E. formosana (Schumacher, 1915), male lectotype.

Figs 11–16. Eusarima formosana (Schumacher, 1915), lectotype, male genitala. 11 – penis, lateral view; 12 – penis, ventral view; 13 – anal tube, dorsal view; 14 – pygofer, lateral view; 15 – style, lateral view; 16 – capitulum of style, dorsal view.