Sazonia (Sazonia) vietnamica, 2018

Gorbunov, Oleg G. & Arita, Yutaka, 2018, A new species of the genus Sazonia O. Gorbunov & Arita, 2001 from Vietnam (Lepidoptera: Sesiidae), Zootaxa 4527 (4), pp. 595-599 : 596-598

Sazonia (Sazonia) vietnamica sp. nov.

( Figs 1–6 )

Holotype ♂ ( Figs 1, 2 ) with labels: “ Vietnam / Bac Kan / Ba Be / 3.V.2006 / M. Wakabayashi ”; “Yutaka Arita / Collection, NSMT / Donation, 2006 / 有田 豊博士 寄贈 ”; “ SESIIDAE / Pictures ÑÑ / 0167-0168–2018 / Photo by O. Gorbunov ”; “Genitalia examined / by O. Gorbunov / Preparation ffi / OG–031-2018”; “ HOLOTYPUS ♂ / Sazonia (Sazonia) vietnamica / O. Gorbunov et Arita, 2018 / O. Gorbunov des., 2018” ( NSMT).

Description. Male (holotype) ( Figs 1, 2 ). Alar expanse 20.7 mm; body length 11.3 mm; forewing 9.3 mm; antenna 5.3 mm.

Head with antenna dark brown to black with dark violet sheen and a few individual yellow scales ventrally at base; scapus dark brown to black with dark blue sheen and a few pale yellow to white scales ventrally; frons dark brown with greenish sheen and a white stripe laterally; vertex black with greenish sheen; labial palpus dark brown to black with bronze sheen and an admixture of white scales interior-ventrally; pericephalic hairs yellow dorsally and white laterally. Thorax with patagia dark brown to black with bright bronze-violet sheen and a small yellow spot laterally; tegula dark brown to black with bronze-violet sheen and a small grey-brown spot with bronze-violet sheen at base of forewing; meso- and metathorax dark brown to black with violet sheen; thorax laterally dark greybrown with bronze sheen; posteriorly both metepimeron and metameron dark grey-brown with bronze sheen and with long white hairs. Legs with neck plate white with golden sheen; fore coxa dark grey-brown with greenishviolet sheen; other parts of fore legs broken off; mid coxa dark grey-brown with greenish-bronze sheen; mid femur dark grey-brown with bronze sheen and a raw of white scales posteriorly; mid tibia dark brown to black with dark violet sheen and an admixture of white hairs dorsally; spurs dark grey-brown with bronze sheen and a few grey scales internally; mid tarsus dark brown to black with dark violet sheen and with a large whitish spot interiorventrally on each tarsomere; hind coxa dark grey-brown with greenish-bronze sheen; hind femur dark grey-brown with bronze sheen and a raw of white scales posteriorly; hind tibia dark brown to black with dark violet sheen, with whitish scales internally and an admixture of white hair-like scales dorsally; spurs dark grey-brown with bronze sheen and a few grey scales internally; hind tarsus dark brown to black with dark violet sheen and with a large whitish spot interior-ventrally on each tarsomere. Forewing dorsally costal margin up to tip of vein R 2 dark brown to black with dark greenish-blue sheen; all other opaque parts dark brown to black with dark violet sheen; transparent areas poorly developed, covered with translucent scales with bluish lustre; external transparent area very small, divided into three cells between veins R 4+5 –M 3, level to vein M 2 slightly broader than discal spot and about 0.5 times as broad as apical area; anterior transparent area narrow and short; posterior transparent area short, not reaching discal spot of hindwing; ventrally opaque parts dark brown with dark violet sheen and an admixture of pale yellow scales on costal margin; cilia dark brown with bronze sheen. Hindwing transparent; dorsally veins, discal spot and outer margin dark brown to black with dark violet sheen; discal spot narrow with parallel margins, reaching to vein M 3; outer margin broad, distinctly broadened between veins M 3 –CuA 2; ventrally veins, discal spot and outer margin dark brown with dark violet sheen; cilia dark brown with bronze sheen, anally white.

Abdomen dorsally dark brown to black with dark violet sheen; tergites 2, 4 and 6 each with a narrow yellow stripe distally; ventrally dark brown with dark violet sheen; sternites 4 and 5 each with a narrow pale yellow stripe distally; anal tuft well-developed, dark brown to black with greenish-bronze sheen and narrowly white laterally.

Male genitalia (holotype) (genital preparation Ñ OG–031-2018) ( Figs 3–6 ). Tegumen-uncus complex relatively short and narrow; uncus well-separated from tegumen, mace-shaped, entirely and covered with short dense hair-like setae; tegumen somewhat longer than uncus ( Fig. 3 ); gnathos well-developed, beak-shaped; valva slightly turned dorsally in distal third, somewhat narrowed and rounded distally, a low fold medially, ventral margin densely covered with long hair-like setae ( Fig. 4 ); saccus short, broad, slightly shorter than vinculum ( Fig. 3 ); aedeagus ( Fig. 5 ) slightly longer than length of valva gradually thinner distally; vesica with an elongate brush of thick finger-shaped cornuti ( Fig. 6 ).

Female Unknown.

Individual variability. Unknown.

Differential diagnosis. This new species can be distinguished from S. gorodinskii (type locality: S. China, Yunnan Prov., 12 km S of Baoshan; holotype is deposited in the collection of the A.N. Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences, Moscow, Russia (COGM)) by colouration of the antenna (dark brown to black with dark violet sheen and a few individual yellow scales ventrally at base in S. vietnamica sp. nov. vs. dark brown to black with dark purple sheen and admixture of individual yellow scales dorsally in apical half in S. gorodinskii ), labial palpus (dark brown to black with bronze sheen and an admixture of white scales interior-ventrally in S. vietnamica sp. nov. vs. dark grey-brown with bronze sheen and an admixture of white scales dorsally on two basal joints in S. gorodinskii ), patagia (dark brown to black with bright bronze-violet sheen and a small yellow spot laterally in this new species vs. dark brown to black with bronze-green sheen and an admixture of individual yellow scales anteriorly in S. gorodinskii ), fore coxa (dark grey-brown with greenish-violet sheen in S. vietnamica sp. nov. vs. dark grey-brown with green-bronze sheen and a narrow cream-coloured stripe externally in the species compared), less developed transparent areas of the forewing (external transparent area very small, divided into three cells between veins R 4+5 –M 3, level to vein M 2 slightly broader than discal spot and about 0.5 times as broad as apical area; posterior transparent area short, not reaching level of discal spot of hindwing in S. vietnamica sp. nov. vs. external transparent area divided into five cells between veins R 3 –CuA 1, level to vein M 2 about 1.5 times as broad as discal spot and slightly broader than apical area; posterior transparent area reaching level of discal spot of hindwing in S. gorodinskii ; compare Fig. 1 with fig. 1 in Gorbunov & Arita 2001) and abdomen (tergites 2, 4 and 6 each with a narrow yellow stripe distally; sternites 4 and 5 each with a narrow pale yellow stripe distally in S. vietnamica sp. nov. vs. tergites 2 and 4–6 each with a narrow yellow stripe posteriorly; sternites 4 and 5 with a narrow white stripe posteriorly in the species compared). The male genitalia of these two species are very similar, but the tegumen is somewhat narrower and the medial fold of the valva is longer in S. vietnamica sp. nov. (see Figs 3–6 and fig. 6 in Gorbunov & Arita 2001). S. vietnamica sp. nov. clearly differs from S. fenusaeformis ( Herrich-Schäffer, 1852 [“ 1843–1856 ”]) (type locality: “Aus der Türkey.” [= Greece, Crete]) by the larger size (alar expanse 20.7 mm in S. vietnamica sp. nov. vs. 11.0–15.0 mm in S. fenusaeformis ) and subgeneric characters.

Bionomics. The larval host plant is unknown. The holotype was collected in the beginning of May.

Habitat. Unknown.

Distribution. The new species is known only from the type locality in North Vietnam.

Etymology. This new species is named after Vietnam, the terra typica.

Figures

FIGURES 1–2. Sazonia vietnamica sp. nov. Holotype, male. 1) dorsal view. Sesiidae picture ffi 0167–2018. Alar expanse 20.7 mm; 2) ditto, ventral view. Sesiidae picture ffi 0168–2018.

FIGURES 3–6. Male genitalia of Sazonia vietnamica sp. nov. Holotype. Genital preparation ffi OG–031-2018. 3) tegumenuncus complex; 4) valva; 5) aedeagus; 6) vesica. Scale bar: 0.5 mm for 3–5, 0.2 mm for 6.