Sabahanus ornamentus, 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) : -

Sabahanus ornamentus sp.nov.

( Fig. 27A–N) (URN:LSID:ZOOBANK.ORG:ACT: 25864CA8-7437-4DBA-BE60-E05EDD7963CB)

Description: Body length: Male, 6.5 mm. Body stramineous or ochraceous. Crown with patch distally and a pair of rounded spots near hind margin, orange; coronal suture orange. Pronotum with a pair of longitudinal sinuate bands near lateral margin, oblique paired sinuate bands from anterior margin and an inverted T-shape mark medially to hind margin, orange. Mesonotum with basal triangles and medial area orange. Forewing with orange band on claval suture, base and commissural region, and with smoky markings on apical cells and some scatered dark brown spots on veins. Fore and hind tibia with setal pits dark brown.

Male genitalia: Aedeagal shaf slightly sinuate with apex curved ventrad hook-like in profile; with a pair of divergent sinuate elongate processes arising from base of aedeagus, tapered to acute apex and slightly longer than shaf.

Material examined: Holotype: ♂, Malaysia, Sabah, FMU10, Apin apin, Keningau , (05°44.3107'N, 116°45.1572'E), 1217 m, 2016.4.24 –5.3, Z.S. Song ( NWAFU) . Paratype: 1 male, Malaysia, Borneo, Sabah, Bukit Monkobo , 51 ′ 48 ′′ N, 116 ′ 58 ′′, 1200 m, 21-viii-1987, A.H. Kirk-Spriggs, Light trap sample, camp 1, stunted hill forest, Bukit Monkobo ( NMW) .

Other material: 1 female, same data as holotype (see Remarks) .

Revision of the Oriental Roxasella group • 41

Distribution: Malaysia (Borneo).

Etymology: Te scientific name ‘ ornamentus ’ refers to the ornamental colour patern of this species.

Remarks: Although the coloration of this species is very distinctive, two other new species from Sabah and Brunei (NHM) are similar. Terefore, we cannot be sure the female studied here is conspecific. If it is the same species then sexual dimorphism occurs, with the male crown having an anterior orange patch and orange coronal suture which are absent in the female.