Paranthrene storozhenkoi O. Gorbunov & Koshkin, 2025

Gorbunov, Oleg G. & Koshkin, Evgeny S., 2025, A new species of the genus Paranthrene Hübner, 1819 (Lepidoptera: Sesiidae) from Lombok Island, Indonesia, Zootaxa 5715 (1), pp. 143-150 : 144-148

Paranthrene storozhenkoi O. Gorbunov & Koshkin , sp. nov.

( Figs 1–9 )

Type material. Holotype: ♂ ( Figs 1, 2 ) with labels: “ Indonesia / West Nusa Tenggara province / Lombok Island, East Lombok Regency / Sembalun Bumbung village / 8°23ʹ53.16″ S, 116°32ʹ24.16″ E, 1275 m / [specimen found dead on road in evening] / 31August 2024 / leg E.S. Koshkin ”; “ SESIIDAE / Pictures №№ / 0055-0056–2025 / Photo by O. Gorbunov ”; “Genitalia examined / by O.G. Gorbunov / Preparation № / OG–014-2025”; “ HOLOTYPUS ♂ / Paranthrene storozhenkoi / O. Gorbunov et Koshkin, 2025 / O. Gorbunov des., 2025”.

Description. Male ( holotype) ( Figs 1, 2 ). Alar expanse 37.0 mm; body length 20.1 mm; forewing length 16.1 mm; length of antenna 8.5 mm.

Head: antenna black with dark blue-violet sheen with several white scales with greenish-golden tint externally on scapus; frons black with bright violet sheen and narrow white stripe with greenish-golden tint laterally; vertex black with dark blue-violet sheen; labial palpus black with dark blue-violet sheen and few pale yellow scales internally; occipital fringe black dorsally and white laterally; neck plate pale yellow.

Thorax: patagium black with bright greenish-violet sheen and several yellow scales with golden tint laterally; tegula, meso- and metathorax black with bright violet sheen; thorax laterally dark gray with bright greenish-violet sheen and few yellow scales with golden tint at base of forewing; posteriorly, both metepimeron and metameron black with bright violet sheen, densely covered with white, long, hair-like scales.

Legs: fore coxa black with greenish-violet sheen and few yellow scales with golden tint basally; fore femur, tibia and tarsus black with greenish-violet sheen; mid coxa dark gray; mid femur black with greenish-violet sheen; mid tibia black with blue-violet sheen, several yellow scales with golden tint exterior-medially and few elongated, pointed, pale yellow scales dorso-distally; spurs black with blue-violet sheen; mid tarsus black with dark violet sheen and admixture of yellow scales with golden tint interior-ventrally on basal tarsomere; hind coxa black with dark violet sheen and several yellow scales posteriorly; hind femur black with dark greenish sheen and several pale yellow scales exterior-basally; hind tibia black with violet sheen and few elongated, pointed, pale yellow scales dorso-distally; spurs black with blue-violet sheen; hind tarsus black with dark violet sheen and admixture of yellow scales with golden tint interior-ventrally on basal tarsomere.

Forewing dorsally in basal part black with dark greenish-blue sheen and few yellow scales with golden tint at base of CuA -stem; costal and anal margins and CuA -stem dark brown to black with dark blue-violet sheen; all other scales brown with bronze sheen; scales on cross-vein black with dark blue-violet sheen; ventrally in basal part black with dark greenish-blue sheen; all other scales brown with bronze sheen, somewhat darker on veins and cross-vein; cilia dark brown with bronze sheen; transparent areas rather poorly-developed; anterior transparent area only in basal half of cell; posterior transparent area rather short, visibly not reaching to level of discal spot of hindwing; external transparent area large, divided into four cells between veins M 1 – CuA 2.

Hindwing transparent; veins and outer margin brown to dark brown with bronze sheen and yellow scales with golden tint on vein CuP basally; with bronze sheen; discal spot narrow with parallel margins, reaching base of common stem of veins M 3 – CuA 1, dark brown to black with dark blue-violet sheen; outer margin extremely narrow, about 0.2 times as broad as cilia.

Abdomen wasp-shaped: segment 2 narrowed distally, segments 3 and 4 very narrow and segment 5 broadened distally; dorsally black with bright greenish-violet sheen; tergite 3 with small yellow with golden tint spot laterally at distal margin; tergites 4–7 each with narrow, broadened laterally, yellow with golden tint stripe distally; ventrally basal sternite dark gray with greenish-blue sheen; sternites 3 and 4 each white with golden tint and narrow yellow stripe distally; sternite 5 mixed with yellow scales with golden tint and brown yellow stripe with golden tint distally; sternites 6 and 7 each black with blue-violet sheen and few yellow scales laterally at distal margin; anal tuft black with dark blue-violet sheen and yellow scales with golden tint dorso-medially and ventrally.

Male genitalia (genital preparation No OG–014-2025; Figs 3–7 ). Uncus narrow, of almost equal thickness throughout, densely covered with thin hair-like scales in distal half on both sides internally; tegumen short; gnathos narrow, without teeth; tuba analis with subscaphium widely sclerotized ( Fig. 3 ); valva ( Fig. 4 ) elongate-ovoid, densely covered with simple hair-like setae at dorsal and ventral margins; crista sacculi low, densely covered with strong pointed setae; saccus ( Fig. 5 ) slightly longer than vinculum, straight, narrow, flattened at base; aedeagus ( Fig. 6 ) rather narrow, slightly curved dorsally, about 0.8 times as long as valva, with well-sclerotized carina penis distally ( Fig. 7 ); vesica with numerous rows of minute acute cornuti.

Female. Unknown.

Individual variability. Unknown.

Differential diagnosis. This new species seems to be closest to Paranthrene aureoviridis Petersen, 2001 ( type locality: Nepal, Kathmandu), from which it can be distinguished by the colouration of antenna (antenna ventrally rust-brown in the basal third and apical part in the species compared, vs antenna black with dark blue-violet sheen with several white scales with greenish-golden tint externally on scapus in the new species), labial palpus (black with golden-yellow basal palpomere in P. aureoviridis , vs black with dark blue-violet sheen and few pale yellow scales internally in P. storozhenkoi O. Gorbunov & Koshkin , sp. nov.), patagium (golden-green with strong metallic sheen in the species compared, vs black with bright greenish-violet sheen and several yellow scales with golden tint laterally in the new species), hind tibia (black with golden-green with strong metallic sheen scales dorsally in P. aureoviridis , vs black with violet sheen and few elongated, pointed, pale yellow scales dorso-distally in P. storozhenkoi O. Gorbunov & Koshkin , sp. nov.) and abdomen (compare Fig. 1 in this article with Taf. 30, Fig. 1 in Petersen 2001). In addition, the external transparent area of the forewing of the new species is somewhat larger than in P. aureoviridis (compare Fig. 1 in this paper with Taf. 30, Fig. 1 in Petersen 2001). Beside this, these two species have some differences in the structure of the male genitalia, especially in the shape of the saccus and carina penis (compare Figs 3–7 in this article with Textabb. 1 in Petersen 2001).

Paranthrene storozhenkoi O. Gorbunov & Koshkin , sp. nov. is clearly distinguished from P. chrysochloris and P. aurifera both by the colouration of the abdomen and the structure of the transparent areas of the forewing (compare Fig. 1 in this paper with 173 and 174 in Arita et al. 2021).

Bionomics. The larval host plant is unknown. The holotype was collected at the end of August.

Habitat. The holotype was collected on the road ( Fig. 8 ) in a mountainous agricultural landscape with areas of deciduous forests at the foot of Mount Rinjani at an altitude of 1275 m ( Fig. 9 ).

Distribution. This new species is known only from the type locality on Lombok Island, Nusa Tenggara Barat, Indonesia.

Etymology. This new species is dedicated to Professor Sergei Yuryevich Storozhenko (Vladivostok, Russia), a specialist in orthopterology and a world-renowned scientist.

Figures

FIGURES 1–2. Holotype of Paranthrene storozhenkoi O. Gorbunov & Koshkin, sp. nov. Alar expanse 37.0 mm. 1—dorsal view, Sesiidae picture № 0055–2025; 2—ventral view, Sesiidae picture № 0056–2025.

FIGURES 3–7. Male genitalia of Paranthrene storozhenkoi O. Gorbunov & Koshkin, sp. nov., holotype, genital preparation № OG–014-2025. 3—tegumen-uncus complex, 4—valva, 5—vinculum and saccus, 6—aedeagus, 7—carina penis. Scale bar: 0.75 mm for figs 3–6 and 0.25 for fig. 7.

FIGURES 8–9. Habitat of Paranthrene storozhenkoi O. Gorbunov & Koshkin, sp. nov. 8—type locality near Sembalun Bumbung village, Lombok, Indonesia, ca. 1275 m, 31.VIII.2024; 9—deciduous forests at the foot of Mount Rinjani near the type locality, 31.VIII.2024.