Cyanosesia tuzovi O. Gorbunov, 2020

Gorbunov, O. G., 2020, A new species of the genus Cyanosesia O. Gorbunov et Arita, 2001 (Lepidoptera: Sesiidae) from the island of Obi, North Maluku, Indonesia with a catalogue of the genus, Russian Entomological Journal 29 (2), pp. 187-194 : 188-191

Cyanosesia tuzovi O. Gorbunov , sp.n.

Figs 1–7 .

MATERIAL. Holotype ♂ ( Figs 1–2 ) with labels: “ Indonesia, N Maluku, / Obi Id., 3 km SW Laiwui , / 01°21.43´S, 127°37.33´E, / 115 m, 25.II.2017, / O. Gorbunov leg.” (white); “ SESIIDAE / Pictures №№ / 0027-0028–2017 / Photo by O. Gorbunov ” (white); “Genitalia examined / by O. Gorbunov / Preparation № / OG–058- 2018” (white); “ HOLOTYPUS ♂ / Cyanosesia tuzovi / O. Gorbunov, 2020 / O. Gorbunov des., 2017” (red).

DESCRIPTION. Male (holotype) ( Figs 1–2 ). Alar expanse 19.4 mm; body length 9.5 mm; forewing 8.6 mm; antenna 4.8 mm.

Head with antenna black with dark greenish-violet sheen dorsally and dark brown ventrally; scapus black with dark greenish sheen dorsally and lemon-yellow ventrally; frons dark gray with bright blue-violet sheen and a broad showwhite stripe laterally; both basal and apical joints of labial palpus black with dark violet sheen, mid joint lemon-yellow with an admixture of black scales with dark violet sheen dorso-distally; vertex entirely black with bright bronze-green sheen; occipital fringe black with dark violet sheen dorsally and lemon-yellow laterally.

Thorax with patagia black with dark violet sheen dorsally and lemon-yellow laterally; tegula black with bright violet-purple sheen, a small lemon-yellow spot anteriorly and a few lemon-yellow scales on inner margin; mesothorax black with violet-purple sheen; metathorax black with dark violet sheen and two lemon-yellow spots; thorax laterally black with blue-violet sheen, a small lemon-yellow spot at bottom of mesomeron and with a narrow lemon-yellow stripe on posterior margin of mesomeron; posteriorly both metepimeron and metameron dark gray with blue-violet sheen covered with long white hair-like scales. Legs with neck plate entirely lemon-yellow; fore coxa black with bright bluish sheen and a large lemon-yellow spot subdistally; fore femur dark brown to black with blue-violet sheen and a few yellow elongate scales interior-distally; fore tibia ventrally yellow, dorsally dark brown to black with a few yellow scales; fore tarsus dark brown to black with bronze sheen dorsally and yellow with golden sheen ventrally; mid coxa black with bright greenish sheen and a few yellow scales internally; mid femur dark brown to black with blue-violet sheen and a few yellow elongate scales interior-distally and a few white hairy-like scales interior-basally; mid tibia black with violet sheen externally and yellow both dorsally and internally, ventrally mixed with black with violet sheen and yellow scales; spurs dark brown to black with bronze-violet sheen; mid tarsus dark brown to black with blue-violet sheen externally and yellow with golden sheen internally; hind coxa black with bright greenish sheen and a few yellow scales internally; hind femur dark brown to black with blue-violet sheen and a few yellow elongate scales interior-distally; hind tibia black with blue-violet sheen and a narrow yellow stripe dorsally; spurs bark brown to black externally and yellow with golden sheen internally; mid tarsus dark brown to black with blue-violet sheen and an admixture of yellow scales dorsally on basal tarsomeres; in addition, scales both on hind tibia distally of mid spurs and on dorsal part of basal tarsomere of hind tarsus visibly elongate and form a hind-leg tuft. Forewing transparent; basally black with dark greenish sheen and a few lemon-yellow scales; costal and anal margins, CuA-stem, discal spot, veins R 4+5 –CuA 2 and cuneiform opaque lines between veins R 3 –CuA 1 black with dark violet sheen; cilia black with dark violet sheen; discal spot extremely narrow, level to vein M 2 about 0.09 times as broad as external transparent area; ventrally costal and anal margins, CuA-stem, discal spot, veins R 4+5 –CuA 2 and cuneiform opaque lines between veins R 3 – CuA 1 black with dark blue-violet sheen and with an admixture of individual yellow scales; cilia dark brown to black with blue-violet sheen. Hindwing transparent; dorsally veins and outer margin black with dark violet sheen; discal spot undeveloped; outer margin extremely narrow, consists of one or two rows of scales; cilia black with dark violet sheen; ventrally veins and outer margin black with dark blue-violet sheen and with an admixture of individual yellow scales; cilia dark brown to black with blue-violet sheen.

Abdomen dorsally black with greenish-violet sheen; tergites 3 and 4 each with a narrow lemon-yellow stripe proximally; tergite 5 with a few lemon-yellow scales latero-proximally; tergites 6 and 7 each with a narrow lemon-yellow stripe distally; ventrally black with blue-violet sheen; sternite 1+2 pale lemon-yellow proximally; sternite 4 with a narrow lemon-yellow stripe proximally; anal tuft small, black with dark violet sheen.

Male genitalia (holotype) (genital preparation № OG– 058-2018) ( Figs 3–6 ). Tegumen-uncus complex well-developed, with numerous setae on inner surface of uncus ventroapically; tegumen relatively long and broad; gnathos rather well-developed, visibly asymmetrical and rounded distally, covered with minute spines ( Fig. 3 ); valva ( Fig. 4 ) pentagonaloval, densely covered with multifurcate scale-like setae in dorsal half and with sparse hairs in ventral half; crista sacculi well-developed, triangular-oval, broad, with hair-like setae on anterior margin; saccus ( Fig. 5 ) narrow, rounded basally, about as long as vinculum; aedeagus ( Fig. 6 ) slightly longer than valva, relatively thin; vesica with numerous pointed spinules.

INDIVIDUAL VARIABILITY. Unknown.

DIFFERENTIAL DIAGNOSIS. By the structure of the male genitalia, this new species seems to be closest to C. leleji O. Gorbunov et Arita, 2016 , from the male of which it can be distinguished by the colouration of the bright coloured scales of the head, thorax and abdomen, which are lemon-yellow in the new species instead of yellow in C. leleji . Besides this, these two species are distinguished by the colouration of the labial palpus (basal join black with bronze sheen externally and pale yellow internally, remaining joints yellow with a narrow black stripe externally in C. leleji , vs. both basal and apical joints black with dark violet sheen, mid joint lemon-yellow with an admixture of black scales with dark violet sheen dorso-distally in C. tuzovi sp.n.), thorax laterally (brown with violet sheen, with a large dark yellow with golden sheen spot medially in the species compared, vs. black with blue-violet sheen, a small lemon-yellow spot at bottom of mesomeron and with a narrow lemon-yellow stripe on posterior margin of mesomeron in C. tuzovi sp.n.), neck plate (dark brown with bronze sheen in C. leleji , vs. entirely lemon-yellow in the new species), hind tibia (dark brown to black with greenish sheen, a broad yellow band at base of mid spurs and with a yellow-orange spot exterior-distally in the species compared, vs. tibia black with blue-violet sheen and a narrow yellow stripe dorsally in the new species), and abdomen (dorsally black with green-blue sheen; tergite 4 with a broad yellow-orange stripe anteriorly; tergite 5 with a narrow yellow-orange stripe anteriorly; tergites 6 and 7 each with a narrow yellow-orange stripe posteriorly; ventrally dark brown to black with greenish sheen; sternites 4 and 5 each with a broad yellow-orange stripe anteriorly; sternite 6 with a few yellow scales posteriorly in C. leleji , vs. black with greenish-violet sheen; tergites 3 and 4 each with a narrow lemon-yellow stripe proximally; tergite 5 with a few lemon-yellow scales latero-proximally; tergites 6 and 7 each with a narrow lemon-yellow stripe distally; ventrally black with blue-violet sheen; sternite 1+2 pale lemon-yellow proximally; sternite 4 with a narrow lemon-yellow stripe proximally C. tuzovi sp.n.). In addition, these two species differ from each other by the conformation of the male genitalia, especially by the shape of both crista sacculi and saccus [compare Figs 4 and 5 with figs 10 and 11 in Gorbunov, Arita, 2016: 38].

By the colouration of the legs and abdomen and by the conformation of both forewing and male genitalia, the new species is clearly distinguishable from all of its congeners.

BIONOMICS. The larval host-plant is unknown. The holotype was attracted by unspecifical artificial sex pheromones. It came to lures right after noon.

HABITAT. In the island of Obi, North Maluku, this species was collected on a clearing among the secondary rainforest in the vicinity of the town of Labuha ( Fig. 7 ).

DISTRIBUTION. Known from the type locality on the islands of Obi , North Maluku, Indonesia .

ETYMOLOGY. This new species is named after my friend Dr. Vasily K. Tuzov, a great expert on Rhopalocera of the world fauna, who courageously shares with me all the hardships in our many joint entomological trips to different parts of the globe.

Catalogue of the genus Cyanosesia O. Gorbunov et Arita 1995

Cyanosesia O. Gorbunov et Arita, 1995 “ Cyanosesia gen. nov. ” — Gorbunov, Arita, 1995: 74. Type species: Cyanosesia tonkinensis O. Gorbunov et Arita, 1995 , by original designation.

LITERATURE. Kallies, 2003: 161 ( Cyanosesia ); Kallies, Arita, 2004: 67, 84 ( Cyanosesia ); Pühringer, Kallies, 2004: 11 ( Cyanosesia ); Kallies, 2011: 152 ( Cyanosesia ); Gorbunov, Arita, 2016: 35, 36 ( Cyanosesia ).

RANGE. Oriental realm from East India (Meghalaya) in the west to the Philippines (Samar) and Borneo (Sabah) in the east and from South China (Gong Kong, Guangdong) and Taiwan in the north and Java and Wallacea (Sulawesi and Obi) in the south.

Cyanosesia borneensis Kallies, 2003

“ Cyanosesia borneensis sp. n. ” — Kallies, 2003: 161, figs 1, 2. Type locality: “North Borneo ( SE) [ Malaysia, Sabah] / Forest Camp , 19 km / N of Kalabakan / …”. Holotype ♀ ( BMHU).

LITERATURE. Kallies, Arita, 2004: 67 ( Cyanosesia borneensis ); Pühringer, Kallies, 2004: 11 ( Cyanosesia borneensis ); Gorbunov, Arita, 2016: 36 ( Cyanosesia borneensis ).

FLIGHT PERIOD. The holotype was collected on November 1.

HOST PLANT. Unknown.

DISTRIBUTION. It is known only from the type locality in Sabah , Indonesia .

Figures

Figs 1–2. Cyanosesia tuzovi sp.n.: 1 — holotype, upside. Sesiidae picture № 0027–2017. Alar expanse 19.4 mm; 2 — ditto underside. Sesiidae picture № 0028–2017. Рис. 1–2. Cyanosesia tuzovi sp.n.: 1 — голотип, сверху. Sesiidae снимок № 0027–2017. РаЗмах крыльев 19.4 mm; 2 — вид сниЗу. Sesiidae снимок № 0028–2017.

Figs 3–6. Male genitalia of Cyanosesia tuzovi sp.n., holotype. Genital preparation № OG–058-2018: 3 — tegumen-uncus complex; 4 — valva; 5 — saccus; 6 — aedeagus. Scale bar 0.5 mm. Рис. 9–12. Гениталии самца Cyanosesia tuzovi sp.n., голотип. Препарат гениталий № OG–058-2018: 3 — тегумен-ункус комплекс; 4 — вальва; 5 — саккус; 6 — Эдеагус. МасШтаб 0,5 мм.

Fig. 7. Habitat of Cyanosesia tuzovi sp.n.: Indonesia, North Maluku, Obi Island, 3 km SW of Laiwui, 01°21.43´S, 127°37.33´E, 115 m, 25.II.2017. Photo by O. Gorbunov. Рис. 7. Биотоп Cyanosesia tuzovi sp.n.: ИндонеЗиЯ, Северное Малуку, остров Оби, 3 км ЮЗ ЛайвуЯ, 01°21.43´ю.Ш., 127°37.33´в.д., 115 м, 25.II.2017. Фото О. Горбунова.