Odites sungsookimi (Sohn & Wu, 2023) comb. nov.

(Japanese name: Tsumaki-shiro-habiro-kibaga [renamed]).

(Figures 5–8, 11, 14)

Scythropiodes sungsookimi Sohn & Wu, 2023: 3.

Scythropiodes sp. 3: Miyano, 2022: 140.

Material examined

[Non-dot type] JAPAN, Honshu: 1♂ 2♀, Ibaraki, Tsukuba-shi, Amakubo, 2.VI.2022 (larva), host: Quercus myrsinifolia (bark), 4–12.VII.2022 emerged, S. Tomura leg. (NSMT); 1♂ 1♀, same data except gen. slide. no. HA24-1074, sample no. HA-PS512 (ELKU); 1♂ 1♀, same data except 1.VI.2024 (larva), host: Quercus myrsinifolia (bark), 1,10. VII.2024 emerged, H. Arashima, K. Nishiya leg. 1♀, Tokyo, Hino-shi, Hodokubo, 14.VII.1991, U. Jinbo leg. (FC); 1♂, Nagano, Iida-shi, Kawaji, 21. VII. 1990, K. Fujisawa leg. (FC); 1♀, Nagano, Shimoina-gun, Anan-cho, Tomikusa, 20.VIII.1988, K. Fujisawa leg. (FC); 1♂, Aichi, Okazaki-shi, Motojuku-cho, 19.VII.1991, N. Matsui leg. (FC); 1♂, Mie, Inabe-shi, Fujiwara-cho, Kamiaiba, 20.VII.1987, T. Mano leg. (MIE); 1♀, same data except (OMNH); 1♀, Mie, Kuwana-shi, Tado-cho, Mizono, 1.VIII.1986, T. Mano leg. (MIE); 1♀, Mie, Miegun, Komono-cho, Chikusa, 21.VII.1990, T. Mano leg. (MIE); 1♀, Mie, Kameyama-shi, Seki-cho, Washiyama, 7.VIII.1991, T. Mano leg. (MIE); 1♂, Mie, Matsusaka-shi, Iitaka-cho, Ooda, Ooda-gawa Riv., 31.VII.2024, T. Mano leg. (MIE); 1♂ 1♀, Mie, Iga-shi, Yabata, Oyako-no-taki, 22.VII.2021, H. Arashima leg., gen. slide. no. HA22- 1011 (MIE); 2♂, Mie, Iga-shi, Tsuge-machi, Kitauchiyama, Okuyono, 23.VII.2021, H. Arashima leg., gen. slide. no. HA23-1030 (MIE); 1♀, Mie, Iga-shi, Tsuge-machi, Kobayashi, 14.VII.2023, H. Arashima leg. (MIE); 3♀, same data except 15.VII.2023; 1♂, same data except 15.VII.2023 gen. slide. no. HA24-1073, sample no. HA-PS512 (ELKU); 2♀, same data except 17.VII.2023; 2♂ 3♀, Osaka, Toyono-cho, Hatutani, 4.VI.2001 (larva), host: Prunus donarium (bark), 6–8.VII.2001 emerged, T. Saito leg. (OPU); 2♀, Osaka, Toyono-cho, Mt. Aokai-yama, 15.VII.1998, T. Saito leg., gen. slide. no. HA23-1507 (OPU); 1♀, Osaka, Minoo-shi, Minoo-koen, 8.VI.1999 (larva), host: Prunus donarium (bark), 20.VI.1999 emerged, T. Saito leg. (OPU); 1♀, same data except 21.VI.1999 (larva), 4.VII.1999 emerged; 1♂, same data except 7.VI.2000 (larva), 28.VI.2000 emerged; 1♂, same data except 28.V.2004 (larva), 23.VI.2004 emerged; 3♂ 3♀, Osaka, Minoo, 6.VI.1978 (larva), host: Castanea crenata (bark), 6-11.VII.1978 emerged, T. Saito leg., gen. slide. no. HA23-1508 (OPU); 1♀, same data except 13.VII.1978 1♀, same data except 16.VII.1978; 1♂ 3♀, same data except 18.V.1979 (larva), host: Castanea crenata (bark), 13-30.VII.1979 emerged, gen. slide. no. HA23-1517, HA24-1521; 1♂, same data except 12.VII.1980; 1♀, same data except 23.VII.1980; 1♀, same data except 4.VIII.1980; 1♂, Hyogo, Mikata-gun, Kami-cho, Muraoka-ku, 27.VII.2019, J. Oku leg. (ELKU); 1♂ 1♀, Hyogo, Takarazuka-shi, Sakaino, Yanagidani, 28.VII.2019, J. Oku leg. (ELKU).

Shikoku: 1♂, Tokushima, Tokushima-shi, Hachiman-cho, 12.VII.2019, H. Higuchi leg. (TKPM); 1♀, same data except 24.VII.2019.

Kyushu: 1♀, Fukuoka, Tagawa-gun, Soeda-machi, Mt. Hiko-san, 23.VII.2022, S. Yagi leg., gen. slide. no. HA23-1031 (ELKU).

[black dot type] JAPAN, Tsushima Is.: 1♂ 1♀, Nagasaki, Tsushima-shi, Kamiagata-machi, Sago, 25- 28.VII.2024, Y. Matsui, T. Oka, J.H. Park leg., gen. slide. no. HA24-1067, HA24-1069, sample no. HA-PS521, HA-PS522 (ELKU).

Korea: 1♀ (Paratype), Chungnam, Dangjin-si, Myeoncheon-myeon, Amisan, 4.VIII.2022, J.C. Sohn leg., gen. slide. no. SJC-1417, sample no. JCS-D-485 (GJUE); 1♂, Gyeongnam, Namhae-gun, Idong-myeon, Sinjeon-ri, Geumsan, 13.VII.2021, J.C. Sohn leg., sample no. JCS-D-516 (GJUE).

Diagnosis

O. sungsookimi has both unicolorous “non-dot type ” and spotted “dot-type”. The non-dot type is similar to Scythropiodes venusta (Moriuti, 1977) but it can be distinguished from the latter by the following forewing characteristics: the color of the basal 1/4 of the costa is cream white, same as ground color (in S. venusta that is brown). This species is of black dot type, which is similar to that of O. ussuriella (Caradja, 1920) by sharing the condition and the location of the black dots on the forewing. However, this species can be distinguished from O. ussuriella by its forewing color: it is cream white with only an apical pale yellow area (in O. ussuriella it is entirely cream yellow).

The male and female genitalia of this species are easily distinguished from those of other species by their unique features: a costal process arising from near the base of the valva, which is strongly curved and subtriangularly expanded in the terminal 2/ 3 in male genitalia, and two longitudinally elliptical signa in the female genitalia.

Redescription

[Non-dot type] Male (Figure 5). Forewing length 3.9–6.2 mm (n = 23), wingspan 10.0– 12.8 mm (n = 22). Head white. Antenna brown; basal 1/4 of antenna white. Labial palpus upturned over 2 times as long as face, white; base of second palpomere with some pale brown scales; apex brown. Thorax covered with white scales. Foreleg and midleg black, hindlegs beige. Forewing with rounded apex, cream white, apical area pale yellow with some indistinct brown scales, costal and outer margins with pale beige scales; fringe of costal area pale yellow and other area white. Forewing underside pale gray. Hindwing pale beige; fringe cilia white. Hindwing underside grey. Abdomen beige.

Female (Figure 6). Forewing length 4.5–7.5 mm (n = 37), wingspan: 10.8–15.2 mm (n = 37). Similar to males.

[Black dot type] Male (Figure 7). Forewing length 4.9 mm (n = 1), wingspan: 10.3 mm (n = 1). Almost same to non-dot type. Two distinct black dots and an indistinct dot at forewing. Two distinct dots at basal 1/3 and basal 2/3; an indistinct dot between distinct dot at basal 1/3 and dorsum.

Female (Figure 8). Forewing length 5.8 mm (n = 1), wingspan: 12.1 mm (n = 1). Similar to male.

Male genitalia (Figure 11). Uncus and gnathos absent. Tegumen shaped as vertical rectangle, as long as vinculum. Valva elliptical, 6/5 times as long as vinculum, bearing long hairs, with costal process arising near base; strongly curved and expanded subtriangular in terminal 2/3. Central lobe of transtilla long and apex strongly bifid. Anellus triangular, without lateral lobes. Saccus semicircular, apex rounded. Phallus (Figure 11B) long, vesica with three strong cornuti: two, lanceolate, 1/2 and 1/4 times as long as phallus at middle; one, digitate, 1/4 times as long as phallus at base.

Female genitalia (Figure 14). Papilla analis narrow, setose. Ovipositor 2 times length of papilla analis.Apophysis anterioris 3/7 times as long as apophysis posterioris. Antrum sclerotized, cylindrical. Ductus bursae membranous, widening with irregular folds and numerous fibrous sclerites in the middle. Ductus seminalis near anterior end of irregular fold of ductus bursae. Corpus bursae elliptic, with two longitudinal elliptical signa with distinct spines. Spines directed anteriorly, particularly long and distinct at distal half.

Distribution

Japan (Honshu, Shikoku, Tsushima Is., Kyushu), Taiwan, Korea.

Host plants

Bark of Quercus myrsinifolia, Castanea crenata (Fagaceae), Prunus donarium (Rosaceae).

Biology

The dark brown larvae make nests by spinning silk threads radially on the bark of the host plant and hide inside them (Figures 15–17) from May to June. Adult specimens were collected from July to August.

Remarks

In Miyano (2022) and Sohn & Wu (2023), this species was assigned to Scythropiodes because of the misinterpretation of male genital structures. Their “gnathos” are actually the central lobe of the transtilla. In fact, because the gnathos is absent, we place this species in the genus Odites.

This species appears to exhibit geographic dimorphism: the non-dot type is distributed in Japan except for Tsushima Island, and the black dot type is distributed in Tsushima Island, Korea, and Taiwan.