Roxasella biarcuata ( Walker, 1857 )

Lu, Lin, Dietrich, Christopher H., Webb, M. D. & Zhang, Yalin, 2025, Revision of the Oriental Roxasella leafopper group: phylogeny, morphological evolution, biogeography, and description of 14 new species, Zoological Journal of the Linnean Society 204 (3) : -

Roxasella biarcuata ( Walker, 1857)

( Fig. 10A–J)

Tartessus biarcuata Walker 1857: 174 .

Roxasella biarcuata Zhang and Webb 1996: 20 (pl. 1, fig. 13, fig. 241–fig. 25).

Diagnosis: Crown with narrow black band at anterior margin with orange band between anterior eye corners. Style apex bilobed, lateroapical margin distinctly concave. Aedeagus with two pairs of apical processes, shaf relatively slender and evenly curved in lateral view, apex slightly bifid, gonopore apical.

Description: Body yellowish; crown with narrow black band at anterior margin and broader orange band between anterior eye corners.

Male genitalia: Style with short apical extension beyond lateral beak-like lateral lobe (bilobed). Connective with stem similar in length to arms. Aedeagus with shaf relatively long and slender cylindrical, in lateral view evenly curved dorsad with apex expanded, in posterior view gradually broadened distally with one pair of long apical processes extended ventrocaudally beyond midlength of shaf and second pair of more slender and shorter processes curved lateroventrad.

Material examined: Lectotype male (designated by Zhang and Webb 1996): Sarawak, NHMUK 013589074 ( NHM).

Distribution: Malaysia ( Sarawak).

Remarks: Tis species was described from an unknown number of female specimens (syntypic) from Borneo collected by Wallace. Te lectotype bears a circular data label with ‘SAR’ for Sarawak, on one side and 57 36 on the reverse. Te later numbers refer to an entry in the NHM register for 1857 36 stating ‘Borneo’ from ‘Stevens’, the later acquiring specimens from Wallace.