Dolichocaudus acicephalus, Wang & Zhang, 2020

Wang, Yang & Zhang, Yalin, 2020, Dolichocaudus, a new genus in the leafhopper subfamily Evacanthinae (Hemiptera: Cicadellidae), with description of two new species, Zootaxa 4732 (1), pp. 161-168 : 163

Dolichocaudus acicephalus sp. n.

( Figs 1–18 )

Description. Body length (including forewing): ♂, 9.7 mm; ♀, 10.9 mm. Head ( Figs 4 , 12 ) triangularly produced at about 45-degree angle in dorsal view, longer than pronotum. Coloration ( Figs 1-4 , 10-13 ) predominantly reddish brown with dark-brown or off-white markings, markings symmetrical but somewhat variable among gender in size and tint. Face off-white, frontoclypeus with an blackish ochreous band along median longitudinal carina and 2 blackish ochreous lateral longitudinal bands. Crown mostly brown, with apex blackish ochreous, sub-apex off-white, 7 small irregular blackish ochreous spots scattered in central and lateral area, an longitudinal off-white band along median longitudinal carina at base part. Pronotum brown with large off-white longitudinal band, and 2 blackish ochreous oblique-lateral bands. Mesonotum and scutellum intersect with blackish ochreous and off-white markings. Forewing with 2 transverse dark brown stripes, and several irregular pale yellow and dark brown markings, veins white. Aedeagus ( Fig. 7 ) ventral-caudal margin without hump posterad of basal angle in lateral view, slightly concave.

Female with lighter colouration than male. Other characteristics as shown in Figs 1–18 .

The holotype was point mounted directly and old, but the paratype was previously preserved in alcohol and subsequently air dried and point mounted. This may account for the colour difference. Among the two specimens studied, the claval veins of the male are fused for a short distance medially, but in the female these veins only approach each other medially for a short distance ( Figs 1 , 10 ).

Type material. Holotype: ♂ ( IZAS), Banba village , Chengfang county, Guangxi province, China, 550m, 4.vi.2000, Wenzhu Li . Paratype: 1♀ ( NWAFU), Ming-feng-gu, Jian-feng-ling, Hainan province, China, 18º44.658’N 108º50.435’E, 1017m, 18.viii.2010, Guo Zheng .

Remarks. This species is very similar to D. brevicephalus sp. n. But can be distinguished by the coloration and the shape of head. D. acicephalus sp. n. has a more pointed and longer head.

Etymology. The specific epithet “ acicephalus ” is an adjective referring to its pointed and elongate head.

Figures

FIGURES 1–9. Dolichocaudus acicephalus sp. n., male: 1. Habitus, dorsal view; 2. Habitus, lateral view; 3. Face; 4. Head, lateral view; 5. Pygofer side, lateral view; 6. Connective and style, ventral view; 7. Aedeagus, lateral view; 8. Aedeagus, ventral view; 9. Subgenital plate, ventral view.

FIGURES 10–18. Dolichocaudus acicephalus sp. n., female: 10. Habitus, dorsal view; 11. Habitus, lateral view; 12. head; 13. Face; 14. Apex of first valvula; 15. First valvula; 16. Apex of second valvula; 17. Second valvula; 18. Third valvula.