Loeia articulata, Dietrich, 2025

Dietrich, Christopher H., 2025, Review of the Southeast Asian leafhopper genus Loeia Duan (Hemiptera: Cicadellidae: Deltocephalinae), Zootaxa 5666 (2), pp. 195-210 : 200-201

Loeia articulata sp. nov.

( Figures 1A , 2A–E , 7E )

Diagnosis. This species resembles L. sinuata in having a pair of dorsomesally directed processes on the pygofer but is easily distinguished by the unpaired ventral process articulated to the aedeagal preatrium and fused to the connective, and by the quadrate female seventh sternite with weakly notched median posterior lobe.

Description. Body length of male 4.5–5.0 mm, female 6.0– 6.3 mm. Head in dorsal view with crown slightly longer medially than next to eye, 1.7× wider at base than medial length. Male pygofer ~3.0× longer than maximum height, ventral spine well developed, extended dorsomesad and slightly posterad. Subgenital plate extended to midlength of pygofer, laterally convex basal section much shorter than concave distal section. Style relatively short and slender, preapical lobe weakly developed, apex tapered and abruptly bent laterad.Aedeagus with dorsal apodeme moderately long and slender, expanded dorsad in lateral view; basal process movably articulated to ventral part of atrium, robust, larger than shaft, extended posterad and gradually tapered to sharp apex, curved asymmetrically laterad; shaft slender, acuminate, evenly curved dorsad; gonopore apical. Female sternite VII slightly wider than long, lateral margins subparallel, posterior margin with short medial lobe slightly indented at middle and marked with arcuate brown macula.

Etymology. The species name refers to the basal process that is articulated to the rest of the aedeagus.

Material examined. Holotype male, THAILAND Phetchabun, Khao Kho NP Mix deciduous forest, 16º32.539'N 101º2.483'E 524m, Malaise trap 26.vi-2.vii.2007, Somchai Chachumnan & Saink Singtong leg. T2460 [ QSBG] . Paratypes: 1 male, THAILAND Chaiyaphum, Tat Tone NP, Lawn near Sab Somboon forest unit, 16º0.792'N 101º58.472'E 648m, Malaise trap 19–26.xi.2006, Tawit Jaruphan leg. T1142 ; 1 male, THAILAND Phetchabun, Khao Kho NP Mix deciduous forest, 16º32.561'Nº0'E 537m, Malaise trap 19–26.vi.2007, Somchai Chachumnan & Saink Singtong leg. T2456 ; 1 male, THAILAND Sakon Nakhon, Phu Phan NP, Dry evergreen near house no.1567, 16º48.628'N 103º53.591'E 522m, Malaise trap 10–16.vi.2007, Winlon Kongnara leg. T2496 ; 1 female, THAILAND Sakon Nakhon, Phu Phan NP, Dry evergreen forest near office, 16º48.618'N 103º53.476'E 526m, Malaise trap 22–29.xii.2006, S. Kongnara leg. T1251 [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 2. Loeia male genital capsule and genitalia. A–E, L. articulata: A, genital capsule, lateral view; B, enlargement of ventral pygofer process; C, genital capsule, ventral view; D–E, genitalia, lateral and ventral views. F–J, L. biclavata: F–G, genital capsule, lateral and ventral views; H, enlargement of ventral pygofer process (right) and accessory spines (left); I–J, genitalia, lateral and ventral views. K–O, L. brevis: K–L, genital capsule, lateral and ventral views; M, subgenital plate and valve, ventral view; N–O, genitalia, lateral and ventral views (apex of aedeagus broken off and missing).

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.