Roxasella arcuata, Lu & Dietrich & Webb & Zhang, 2025

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 arcuata sp.nov.

( Fig. 9A–Q) (URN:LSID:ZOOBANK.ORG:ACT: 0A87781E-4FE9-45A6-BDD6-3300D778E0CC)

Diagnosis: Head with two pairs of dark spots on anterior margin of crown. Male pygofer with caudoventral margin smooth. Style apex not bilobed, lateroapical margin convex. Aedeagus with two pairs of apical processes, one pair extended ventrolateral to shaf midlength and curved toward shaf, second pair very long and thin, extended slightly distad then sharply curved basad and extending nearly to shaf base. Without sclerite between connective and aedeagus. Fore tibia with dorsal setal arrangement of rows AD and PD 2 + 4. Fore femur IC with about 14 setae.

Description: Length (including tegmen): male 7.5 mm, female 8.0 mm.

Coloration: Body tan to yellow. Crown with two pairs of black markings at anterior margin, one submedial and one sublateral adjacent to ocelli, remainder of crown tan anteriorly fading to yellow posteriorly. Face stramineous with narrow black band at dorsal margin. Pronotum tan anteriorly and laterally, darker greenish posteromedially.

Crown produced, parabolically rounded, longer medially than next to eyes. Fore tibia with dorsal setal arrangement of rows AD and PD 2 + 4. Fore femur IC with about 14 setae.

Male genitalia: Style ( Fig. 9O) without short apical extension beyond lateral beak-like lateral lobe. Connective ( Fig. 9O) with stem similar in length to arms. Aedeagus with shaf relatively slender cylindrical, in lateral view ( Fig. 9N); shaf arcuate with two pairs of elongate apical processes, one pair extended cephalad and curved toward shaf, second pair longer and thinner, directed caudad and extended to near base of shaf.

Female (non-type) genitalia: Abdominal sternite VII ( Fig. 9E) medially produced.

Material examined: Holotype: ♂, Malaysia, Sabah, FMU10, Apin apin, Keningau (05°44.31 ′ 07N, 116°45.15 ′ 72E), 1217 m, 24 April–3 May 2016, coll. Z.S. Song.

Additional (non-type) material: 1♀ (tentatively associated to males, see generic Remarks), same data as holotype ( NWAFU) .

Etymology: Te specific epithet, a Latinized adjective, refers to the curved (arcuate) aedeagal shaf.

Remarks: Te female tentatively identified as this species has the abdominal sternite VII similar to R. dolichospina but can be distinguished from the later by the greater projection of the posterolateral corner of sternite VII and the absence of intensely concave arcuated sculpture of sternite VII.