Jerbeia darkovi, Gorbunov, 2018

Gorbunov, Oleg G., 2018, A new genus and species of clearwing moth (Lepidoptera: Sesiidae) from Ethiopia, Zootaxa 4497 (4), pp. 492-500 : 494-495

Jerbeia darkovi sp. nov.

( Figs 1–17 )

Holotype ♂ ( Figs 1, 2 ) with labels: “ Ethiopia, Oromia, 21.8 km / NW (289.5°) Dembi Dolo, / 08°36.04′ N, 034°36.8′ E, / 1610 m, 07.XI.2017, / O. Gorbunov leg.”; “ SESIIDAE / Pictures ÑÑ / 0051-0052–2018 / Photo by O. Gorbunov”; “ HOLOTYPUS ♂ / Jerbeia darkovi / O. Gorbunov, 2018 / O. Gorbunov des., 2018”.

Paratypes (11 ♂♂): 1 ♂ ( Figs 3, 4 ), “Ethiopia, Oromia, / 4.2 km NW (308.3˚) Kebe, / 09˚00.279΄N, 034˚56.478΄E, / 1770 m, 17.X.2017, / O. Gorbunov leg.”; “ SESIIDAE / Pictures ÑÑ / 0081-0082–2018 / Photo by O. Gorbunov”; “PARATYPUS ♂ / Jerbeia darkovi / O. Gorbunov, 2018 / O. Gorbunov des., 2018”; 1 ♂, “Ethiopia, Oromia, / 4.2 km NW (308.3˚) Kebe, / 09˚00.279΄N, 034˚56.478΄E, / 1770 m, 17.X.2017, / O. Gorbunov leg.”; “ SESIIDAE / Pictures ÑÑ / 0083-0084–2018 / Photo by O. Gorbunov”; “PARATYPUS ♂ / Jerbeia darkovi / O. Gorbunov, 2018 / O. Gorbunov des., 2018”; 1 ♂, “Ethiopia, Oromia, / 4.2 km NW (308.3˚) Kebe, / 09˚00.279΄N, 034˚56.478΄E, / 1770 m, 17.X.2017, / O. Gorbunov leg.”; “ SESIIDAE / Pictures ÑÑ / 0079-0080–2018 / Photo by O. Gorbunov”; “Genitalia examined / by O. Gorbunov / Preparation Ñ / OG–002-2018”; “PARATYPUS ♂ / Jerbeia darkovi / O. Gorbunov, 2018 / O. Gorbunov des., 2018”; 1 ♂ ( Figs 5, 6 ), “Ethiopia, Oromia, 21.8 km / NW (289.5°) Dembi Dolo, / 08°36.04′ N, 034°36.8′ E, / 1610 m, 07.XI.2017, / O. Gorbunov leg.”; “ SESIIDAE / Pictures ÑÑ / 0047-0048–2018 / Photo by O. Gorbunov”; “PARATYPUS ♂ / Jerbeia darkovi / O. Gorbunov, 2018 / O. Gorbunov des., 2018”; 1 ♂, “Ethiopia, Oromia, 21.8 km / NW (289.5°) Dembi Dolo, / 08°36.04′ N, 034°36.8′ E, / 1610 m, 07.XI.2017, / O. Gorbunov leg.”; “ SESIIDAE / Pictures ÑÑ / 0049-0050–2018 / Photo by O. Gorbunov”; “PARATYPUS ♂ / Jerbeia darkovi / O. Gorbunov, 2018 / O. Gorbunov des., 2018”; 1 ♂, “Ethiopia, Oromia, 21.8 km / NW (289.5°) Dembi Dolo, / 08°36.04′ N, 034°36.8′ E, / 1610 m, 07.XI.2017, / O. Gorbunov leg.”; “ SESIIDAE / Pictures ÑÑ / 0053-0054–2018 / Photo by O. Gorbunov”; “PARATYPUS ♂ / Jerbeia darkovi / O. Gorbunov, 2018 / O. Gorbunov des., 2018”; 1 ♂, “Ethiopia, Oromia, 21.8 km / NW (289.5°) Dembi Dolo, / 08°36.04′ N, 034°36.8′ E, / 1610 m, 07.XI.2017, / O. Gorbunov leg.”; “ SESIIDAE / Pictures ÑÑ / 0085-0086– 2018 / Photo by O. Gorbunov”; “PARATYPUS ♂ / Jerbeia darkovi / O. Gorbunov, 2018 / O. Gorbunov des., 2018”; 1 ♂, “Ethiopia, Oromia, 21.8 km / NW (289.5°) Dembi Dolo, / 08°36.04′ N, 034°36.8′ E, / 1610 m, 09.XI.2017, / O. Gorbunov leg.”; “ SESIIDAE / Pictures ÑÑ / 0087-0088–2018 / Photo by O. Gorbunov”; “PARATYPUS ♂ / Jerbeia darkovi / O. Gorbunov, 2018 / O. Gorbunov des., 2018”; 1 ♂ ( Figs 7, 8 ), “Ethiopia, Oromia, 21.8 km / NW (289.5°) Dembi Dolo, / 08°36.04′ N, 034°36.8′ E, / 1610 m, 09.XI.2017, / O. Gorbunov leg.”; “ SESIIDAE / Pictures ÑÑ / 0089-0090–2018 / Photo by O. Gorbunov”; “PARATYPUS ♂ / Jerbeia darkovi / O. Gorbunov, 2018 / O. Gorbunov des., 2018”; 1 ♂, “Ethiopia, Oromia, 21.8 km / NW (289.5°) Dembi Dolo, / 08°36.04′ N, 034°36.8′ E, / 1610 m, 09.XI.2017, / O. Gorbunov leg.”; “ SESIIDAE / Pictures ÑÑ / 0091-0092– 2018 / Photo by O. Gorbunov”; “PARATYPUS ♂ / Jerbeia darkovi / O. Gorbunov, 2018 / O. Gorbunov des., 2018”; 1 ♂, “Ethiopia, Oromia, 21.8 km / NW (289.5°) Dembi Dolo, / 08°36.04′ N, 034°36.8′ E, / 1610 m, 09.XI.2017, / O. Gorbunov leg.”; “Genitalia examined / by O. Gorbunov / Preparation Ñ / OG–001-2018”; “PARATYPUS ♂ / Jerbeia darkovi / O. Gorbunov, 2018 / O. Gorbunov des., 2018”.

Description. Male (holotype) ( Figs 1, 2 ). Alar expanse 16.2 mm; body length 9.8 mm; forewing 7.2 mm; antenna 5.1 mm.

Head with antenna black with dark greenish blue sheen and a narrow yellow stripe ventro-externally; scapus black with dark purple sheen and an admixture of yellow scales ventrally; frons entirely dark brown with purpleviolet sheen; vertex black with dark greenish sheen; labial palpus yellow to yellow-orange and a narrow yellow stripe ventro-externally; occipital yellow-orange.

Thorax with patagia dark brown to black with dark blue-purple sheen; tegula, meso- and metathorax entirely dark brown to black with dark blue-violet sheen; thorax laterally dark gray with bronze-violet sheen and a narrow and short yellow stripe at base of forewing; posteriorly both metepimeron and metameron dark brown to black with purple-bronze sheen covered with long, silvery-white hair-like scales. Legs with neck plate yellow with golden sheen; fore coxa dark brown to black with blue-violet sheen, a very narrow yellow stripe internally and a broader yellow-orange stripe externally; fore femur dark brown to black with violet sheen, a few yellow scales distally and yellow hair-like scales posteriorly; both fore tibia and fore tarsus black with violet sheen dorsally and yelloworange with golden sheen ventrally; mid coxa black with blue-violet sheen and a few yellow scales anteriorly; mid femur dark gray with bronze sheen and a few yellow scales internally, externally dark brown to black with bronzeviolet sheen and a few yellow scales basally; mid tibia dark brown to black with violet sheen and yellow scales interobasally; spurs yellow with golden sheen; mid tarsus dark brown to black with violet sheen dorsally and yellow with golden sheen ventrally; hind coxa black with blue-violet sheen and a few yellow scales anteriorly; hind femur dark brown to black with bronze-violet sheen externally, a few yellow scales basally and white hair-likes scales posteriorly, dark gray with bronze sheen and a few yellow scales internally; hind tibia dark brown to black with violet sheen and yellow scales both interobasally and distally; spurs yellow with golden sheen; hind tarsus dark brown to black with violet sheen dorsally and yellow with golden sheen ventrally. Forewing: opaque parts entirely black with dark violet sheen dorsally; dark brown to black with dark violet-purple sheen, a dense admixture of yellow scales at costal margin and CuA-stem ventrally; transparent areas rather well-developed, covered with translucent grayish scales; posterior transparent area slightly not reaching the proximal margin of discal spot; external transparent area relatively small, divided into five cells between veins R3 and CuA1, level to vein М2 about as broad as discal spot and about half as broad as apical area; cilia dark brown to black with dark violet-purple sheen. Hindwing transparent; veins, discal spot and outer margin dark brown to black with dark violet-purple sheen and a few yellow scales at costal margin ventrally; discal spot broad, trapeziform, slightly not reaching the base of vein М3–CuA1; outer margin about half as broad as cilia; cilia dark brown with dark violet sheen.

Abdomen including anal tuft black with dark greenish-blue sheen dorsally, dark brown to black with violet sheen ventrally; anal tuft narrowly orange laterally.

Male genitalia (paratypes) (Genital preparations ÑÑ OG–001-2018 and OG–002-2018) ( Figs 9–14 ). Tegumen-uncus complex broad; scopula androconialis well-developed, somewhat less than half as long as tegumen-uncus complex ( Fig. 9 ); crista gnathi medialis semi-oval, long, about half as long as crista gnathi lateralis; crista gnati lateralis semi-oval, about twice as long and as broad as crista gnathi medialis ( Fig. 9 ); valva ( Fig. 10 ) trapeziform-ovoid with a ventrally oblique tip, crista sacculi undeveloped, but bifurcated setae somewhat compacted anteroventrally; ventral crista flat, but armed with a group of strong pointed setae; saccus ( Fig. 11 ) relatively broad, gradually narrowed and rounded basally, long, about 2.5 times longer than vinculum; aedeagus ( Figs 12, 13 ) thin, straight, about 1.3 times as long as valva; vesica with two flat and dentate cornuti ( Fig. 14 ).

Female. Unknown.

Individual variability. Unknown for females. The males are variable in the number of orange scales on the anal tuft and in the degree of development of the external transparent area of the forewing ( Figs 1–8 ). Thus, the external transparent area of the forewing varies from very small, level to vein М2 about 0.5 times as broad as discal spot ( Figs 3, 4 ) to well-developed, level to vein М2 about 1.2 times broader than discal spot ( Figs 5, 6 ). However, in all cases it is divided into five cells between veins R3 and CuA1. Individual sizes range as follows: alar expanse 16.1–17.6 mm; body length 9.8–10.9 mm; forewing 7.4–8.0 mm; antenna 5.6–5.8 mm.

Differential diagnosis. Habitually, this new species looks like Nesosphecia mystica Bartsch, 2018 (type locality: “Мadagascar Est: Мoramanga, Andasibe, vic. Anevoka, Foret Pluviale de Мaromiza NR., 1150 m …” (Bartsch 2018: 184)), from which it can be distinguished by the colouration of the antenna (dorsally black with a narrow orange-brown spot subapically, ventrally brown with a black tip in N. mystica , vs. black with dark greenishblue sheen and a narrow yellow stripe ventro-externally in J. darkovi sp. nov.) and fore coxa (white with a grey inner margin in N. mystica , vs. dark brown to black with blue-violet sheen, a very narrow yellow stripe internally and a broader yellow-orange stripe externally in the new species, cp. Figs 2, 4, 6, 8 with fig. 24 in Bartsch 2018: 179), as well as by the conformation of the male genitalia, especially the shape of the tegumen-uncus complex, valva and vesica (cp. Figs 9–14 with fig. 27 in Bartsch 2018: 182). Jerbeia darkovi sp. nov. cannot be confused with any other Synanthedonini of the Afrotropical region. Superficially, it slightly resembles some species of the Palaearctic genera Chamaesphecia and Dipchasphecia , but it differs from all of them by the structure of the male genitalia.

Bionomics. The larval host plant is unknown. The males of the type series were attracted by unspecifical artificial sex pheromones. They came to lures at noon and somewhat later (12–3 p.m.).

Habitat. Primary tropical forest with Coffea arabica L. ( Rubiaceae ) as undergrowth ( Fig. 16 ) and a disturbed riparian forest also with Coffea arabica as undergrowth ( Fig. 17 ).

Distribution. This new species is known only from two localities in the western part of Ethiopia (Oromia).

Etymology. This new species is named after Dr. Andrei A. Darkov, Head of the Russian part of the Joint Ethio- Russian Biological Expedition (Addis-Ababa, Ethiopia and Мoscow, Russia).

Figures

FIGURE 16. Habitat of Jerbeia darkovi gen. et sp. nov. near the road Dembi-Dolo—Gambela: Ethiopia, Oromia, 21.8 km NW (289.5°) of Dembi Dolo, 08°36.04′ N, 034°36.8′ E, 1610 m, 07.XI.2017.

FIGURE 17. Habitat of Jerbeia darkovi gen. et sp. nov. near the road Kake—Begi: Ethiopia, Oromia, 4.2 km NW (308.3˚) of Kebe, 09˚00.279΄N, 034˚56.478΄E, 1770 m, 17.X.2017.

FIGURES 1–8. Variability of males Jerbeia darkovi gen. et sp. nov. 1) holotype, male, upside. Sesiidae picture № 0051–2018. Alar expanse 16.2 mm; 2) ditto, underside. Sesiidae picture № 0052–2018; 3) paratype, male, upside. Sesiidae picture № 0081– 2018. Alar expanse 16.1 mm; 4) ditto, underside. Sesiidae picture № 0082–2018; 5) paratype, male, upside. Sesiidae picture № 0047–2018. Alar expanse 17.6 mm; 6) ditto, underside. Sesiidae picture № 0048–2018; 7) paratype, male, upside. Sesiidae picture № 0089–2018. Alar expanse 16.6 mm; 8) ditto, underside. Sesiidae picture 0090–2018.

FIGURES 9–14. Male genitalia of Jerbeia darkovi gen. et sp. nov. Paratypes. 9) tegumen-uncus complex, lateral view. Genital preparation № OG–001-2018; 10) right valva. Genital preparation № OG–001-2018; 11) saccus, ventral view. Genital preparation № OG–001-2018; 12) aedeagus, lateral view. Genital preparation № OG–001-2018; 13) aedeagus, lateral view. Genital preparation № OG–002-2018; 14) vesica, lateral view. Genital preparation № OG–002-2018. Scale bar: 0.5 mm for 9– 13, 0.2 mm for 14.

FIGURE 15. Wing venation of Jerbeia darkovi gen. et sp. nov. male, paratype.