Teinotarsina aurantiaca Yagi, Hirowatari & Arita

Yagi, Sadahisa, Hirowatari, Toshiya & Arita, Yutaka, 2016, A remarkable new species of the genus Teinotarsina (Lepidoptera, Sesiidae) from Okinawa-jima, Japan, ZooKeys 571, pp. 143-152 : 144-148

Taxon classification Animalia Lepidoptera Sesiidae

Teinotarsina aurantiaca Yagi, Hirowatari & Arita sp. n. Figs 3, 4, 5

Type material.

Holotype male (ELKU Type No.26), Hentona Kunigami-son, Kunigami-gun Okinawa Prefecture, Japan, 265 m, 30 May 2015, S. Yagi leg (ELKU).

Description.

Male (Figs 2, 3). Alar expanse 29.0 mm; forewing 12.3 mm; body length 14.2 mm; antenna 8.5 mm.

Head: frons black, with orange scales laterally; vertex black; pericephalic scales orange; collar with black hair-like scales, anteriorly with some orange hair-like scales; labial palps orange; scape orange; antenna dorsally covered with black scales in basal half, orange scales in apical half, ventrally naked, reddish brown, densely ciliate with yellow short sensory hairs; apical tuft yellow mixed with brown; proboscis yellowish orange.

Thorax: black; patagia black; tegula black, with orange scales anteriorly and long black hairs posteriorly; mesothorax black, with some orange scales laterally; metathorax black, with a tuft of orange hairs laterally.

Legs: fore coxa black with some orange scales basally; femur orange with black basally; fore tibia orange with black dorsally; fore tarsus yellowish orange; mid coxa, femur and tibia black with some orange scales distally; mid tarsus yellowish orange; hind coxa black with some orange scales distally; hind femur black; hind tibia in basal half with black fluffy hairs, in distal half basally black with dark violet-purple sheen, distally with black fluffy hairs and apical orange hairs; hind tarsus black in basal half, with yellowish orange hairs dorsally in distal half.

Abdomen: dorsally black with dark violet-purple sheen; tergite 5 with orange scales anteriorly, tergites 6-7 with narrow orange posterior margin; ventrally yellowish orange with dark violet-purple sheen. Sternite 3 with narrow orange anterior margin, sternite 4 with wide orange anterior margin, sternite 5 almost orange, sternites 6-7 orange with mixture of orange and black scales posteriorly; anal tuft short, orange mixed with black hair-like scales.

Forewing: basally transparent, other parts semitransparent with brownish sheen; costal and anal margins, CuA-stem black with dark violet-purple sheen, scattered with orange scales; discal spot yellow-orange; apical area narrow with yellowish orange scales; projections of dark brown scales from distal margin of forewing into cells of ETA; no projection into ATA and PTA; cilia dark brown with bronze sheen; dorsal margin mixed with black and orange scales.

Hindwing: basally transparent, other parts semitransparent with brownish sheen; veins and outer margin dark brown with orange scales; discal spot undeveloped; apical area with orange scales; outer margin narrow, about two-three times as narrow as cilia; cilia dark brown.

Male genitalia (Fig. 5). Tegumen well separated from uncus; uncus with a tuft of long setae posterodorsally, posteroventrally with a brush of long setae on each side, apical process relatively long, sharply-pointed ventrally; gnathos undeveloped; valva trapezoid with apical half broad; setae of inner surface short, thick, not pointed in median ventral area, long in apical half of central area, thin in dorsal area; sacculus developed; saccus rounded anteriorly; vinculum with a pair of projections posteriorly; Phallus posterodorsally broad; vesica with many small spine-like cornuti; manica with many minute spinules.

Female. Unknown.

Etymology.

The species name “aurantiaca” an adjective, the female form of Latin aurantiacus (= orange), refers to the orange body of the new species.

Biology.

Unknown. The male holotype was collected on the roadside in a subtropical forest park "Shinrin Koen" (Fig. 6). In this habitat, Castanopsis sieboldii (Makino) Hatus. ex T.Yamaz. et Mashiba and Pinus luchuensis Mayr were dominant trees. The moth has been observed flying slowly at a height of approximately 0.7 m around 15:00.

Hostplant.

Unknown.

Distribution.

Okinawa-jima, Japan. Only known from the type locality.

Remarks.

The new species can be separated from Teinotarsina longitarsa Arita & Gorbunov, 2002, which occurs on Taiwan, by the orange coloration of the body, the relatively stout antennae with orange apical half (slender with a large white to pale yellow spot subapically in Teinotarsina longitarsa ), and the fore- and hindwings which are semi-transparent with a brownish sheen (transparent overall in Teinotarsina longitarsa ). The male genitalia of the new species are very similar to those of Teinotarsina longitarsa but are distinguishable from the latter by the following characters: 1) the setae on the ventral part of the uncus are longer than those in Teinotarsina longitarsa , 2) the apical process of the uncus is more sharply-pointed ventrally and relatively longer than that of Teinotarsina longitarsa , 3) the apical half of the valva is slightly broader than that in Teinotarsina longitarsa , 4) the anterior part of the aedeagus is broader than that of Teinotarsina longitarsa .