Loeia robusta, Dietrich, 2025

Dietrich, Christopher H., 2025, Review of the Southeast Asian leafhopper genus Loeia Duan (Hemiptera: Cicadellidae: Deltocephalinae), Zootaxa 5666 (2), pp. 195-210 : 206-207

Loeia robusta sp. nov.

( Figures 1I , 4I–L , 7K )

Diagnosis. This species differs from all other species of the genus in its much smaller body size and robust aedeagus with paired, recurved lateral processes at the apex.

Description. Body length of male 4.5 mm, female 5.2–5.3 mm. Head in dorsal view with crown distinctly longer medially than next to eye, 1.7× wider at base than medial length. Male pygofer ~2.8× longer than maximum height, ventral spine well developed, extended basomesad and slightly dorsad. Subgenital plate extended slightly beyond midlength of pygofer, laterally convex basal section much shorter than concave distal section. Style moderately long, preapical lobe weakly developed, apex tapered, digitiform, curved laterad. Aedeagus with dorsal apodeme broad in lateral view, tapered dorsad; shaft robust, curved slightly dorsad, with low dorsal hump near midlength in lateral view, lateral margins broadly convex in ventral view, with pair of tapered apical processes extended lateroventrad and curved anterad apically, gonopore apical. Female sternite VII approximately as long as wide, posterior margin distinctly trilobed with relatively long, narrow median lobe flanked by pair of shorter, acutely angulate lateral lobes.

Etymology. The species name refers to the robust aedeagal shaft.

Material examined. Holotype male, THAILAND Phitsanulok, Thung Salaeng Luang NP, Dry evergreen forest, 16º50.277'N 100º52.917'E 486m, Malaise trap 2–9.x.2006, Pongpitak Pranee leg. T935 [ QSBG] . Paratypes: 1 female, same data as holotype ; 1 female, THAILAND Chiang Mai, Doi Chiangdao NP Pha Tang substation, 19º24.978'N 98º54.886'E 526m, Malaise trap 28.viii-4.ix.2007, S. Jugsu & A. Watwanich leg. T5678 ; 1 female, THAILAND Loei Phu Ruea NP office, 17º28.826'N 101º21.33'E 860m, Malaise trap 19–26.vii.2006, Nukoonchai Jaroenchai leg. T317 [all paratypes INHS] .

Figures

FIGURE 1. Loeia new species, dorsal and lateral habitus, males. A, L. articulata; B, L. biclavata; C, L. brevis (left forewing missing); D, L. cetacea; E, L. chelata; F, L. compressa; G, L. decidua; H, L. elongata; I, L. robusta; J, L. serrata (right forewing missing); K, L. sinuata; L, L. tridentata. Scale bars = 1 mm.

FIGURE 4. Loeia male genital capsule and genitalia. A–D, L. decidua: A–B, genital capsule, lateral and ventral view; C–D, genitalia, lateral and ventral view (left style not shown). E–H, L. elongata: E–F, genital capsule, lateral and ventral view; G–H, genitalia, lateral and ventral view; I–L, L. robusta: I–J, genital capsule, lateral and ventral view; K–L, genitalia, lateral and ventral view (connective damaged in L).

FIGURE 7. A–D, Loeia serrata ovipositor: A–B, first valvula with enlargement of apex; C–D, second valvulae and gonoplac with enlargement of second valvulae apex. E–N, sternite VII: E, L. articulata; F, L. cetacea; G, L. chelata; H, L. compressa; I, L. decidua; J, L. elongata; K, L. robusta; L, L. serrata; M, L. tamtipi; N, L. tridentata. O, L. tamtipi, base of abdomen, ventral view, showing 1S and 2S apodemes; P, same showing apodemes only.