Ectoedemia ortiva Rociene

Yagi, Sadahisa, Hirano, Nagao & Hirowatari, Toshiya, 2019, Taxonomic notes on the Ectoedemia suberis and angulifasciella species groups in Japan (Lepidoptera: Nepticulidae), Zootaxa 4706 (2), pp. 201-230 : 210-212

2. Ectoedemia ortiva Rociene ̇ & Stonis, 2013

( Figs. 9–12 , 19–23 , 59 )

Ectoedemia ortiva Rociene ̇ & Stonis, 2013: 76.

Type locality: The Russian Far East, Primorskiy Kray, 20 km E Ussuriysk, Gornotayezhnoe.

Material examined. JAPAN. Hokkaido: 2 ♂, Sibi, Ishikari, Hokkaido, 15.vii.2012, H. Kogi, genitalia slide nos. 351, 568 ; 1 ♂, Tomamu, Shimukappu, 28.vi.2006, H. Kogi; 1 ♂, Katsuranosawa, Atuta, 15.vii.2002, H. Kogi, geni- talia slide no. 6299.

Diagnosis. This species is very similar to E. paraortiva Rociene ̇ & Stonis, 2014 based on the male genitalia. It can be identified by the fascia of the forewing (absent in E. paraortiva ) and the androconial scales surrounding the hair-pencil (absent in E. paraortiva ). These extensive androconial scales are absent in other East Palearctic species in the angulifasciella group. This species and E. paraortiva also can be distinguished from other Ectoedemia by their short and thick phallus (whereas other species have a slenderer phallus).

Male ( Figs. 9–12 ). Forewing length 2.2–2.5 mm (n = 4), wingspan 4.9–5.6 mm (n = 4), antennae with 31–32 segments (n = 4). Head with frontal tuft yellowish orange; collar yellow cream; scape and pedicel cream; flagellum grayish yellow. Thorax and tegula fuscous. Forewing fuscous; medial fascia cream; cilia line interrupted; fringe outer margin cream, posterior brownish gray; underside grayish brown. Hindwing dark brownish gray; costal margin basally expanded; frenulum yellow cream; hair-pencil yellowish cream, ca. 0.3 length of hindwing; androconial scale surrounding hair-pencil slender and yellowish cream; fringe of hindwing dark brownish gray. Legs and abdomen dark brownish gray; anal tuft brownish yellow.

Male genitalia ( Figs. 18–22 ). Capsule length ca. 250 μm (n = 2). Valva ca. 160 μm (n = 2). Phallus 290–310 μm (n = 2). Pseuduncus weakly projected. Lateral arm of gnathos basally slender and subapically curved inwardly; central element of gnathos with small sclerite apically. Valva trapezoid; basally not projected; distal process taper- ing and sharp; subapically with a small projection inwardly near outer margin; inner margin more-or-less straight, slightly curved inwardly, subapically slightly roundish; outer margin roundish. Transverse bar of transtilla moderate; lateral arm thick; sublateral process of transtilla moderate length. Vinculum with weak anterior emargination; lateral lobe developed, apically weakly roundish. Phallus short and ovate; median carinae slender, usually with additional spine; vesica with of many spinelike cornuti, which are larger and sharp near carina with smaller spines near cathrema.

Female. Unknown.

Distribution ( Fig. 59 ). Japan (new record): Hokkaido; Russia: Far East.

Host plant. Unknown. Probably Ulmus sp. ( Ulmaceae ) because similar species utilize Ulmus as larval hosts.

Biology. Adults were collected in June and July.

Remarks. This species is herein recognized as a member of the angulifasciella group. In male genitalia, species of the suberis group have a large curved valva, while E. ortiva has a more-or-less straight inner margin that is recognized as a diagnostic character of the angulifasciella group. Moreover, in the angulifasciella group, the carinae of male genitalia often have additional spines, and E. ortiva also shares this trait. However, E. ortiva has remarkable androconial scales surrounding the hair-pencil. This is not observed in other East Asian species in the angulifasciella group, while modest androconial scales are observed in some species such as Ectoedemia pilosae . Moreover, European E. spinosella (de Joannis, 1908) and American E. ulmella (Braun, 1912) and E. nyssaefoliella (Chambers, 1880) have distinct androconial scales ( van Nieukerken 1985; Johansson et al. 1990; van Nieukerken et al. 2018; van Nieukerken pers. comm.). Thus, the presence of a hair-pencil and androconial scales on hindwing are not the best characters for assigning a species to a species group, although these traits are very useful for identification at the species level.

Based on the similarity of the male genitalia, it is suggested that E. paraortiva also belongs to the angulifasciella group.

Figures

FIGURES 9–12. Adults of Ectoedemia ortiva. 9. Male (genitalia slide no. SY351). 10. Male (Genitalia slide No. SY568). 11. Hindwing. 12. Underside of male. Scale bars: 2.0 mm.

FIGURES 19–23. Male genitalia of Ectoedemia ortiva. 19, 20. Genital capsule with phallus removed (Genitalia slide No. SY351). 21. Phallus. 22. Cornuti. 23. Pseuduncus and gnathos (Genitalia slide No. SY568). Scale bars: 100 μm (19–22), 50 μm (23).

FIGURES 58–63. Japanese distribution maps of Japanese species of the Ectoedmeia suberis and angulifasciella groups. 58. E. chasanella. 59. E. ortiva. 60. E. pilosae. 61. E. picturata. 62. E. occultellla. 63. E. jacutica.

FIGURES 13–18. Male genitalia of Ectoedemia chasanella. 13, 14. Genital capsule with phallus removed (Genitalia slide No. SY419). 15. Phallus (Genitalia slide No. SY419). 16. Genital capsule with phallus removed (Genitalia slide No. SY350). 17. Pseuduncus (Genitalia slide No. SY476). 18. Cornuti (Genitalia slide No. SY419). Scale bars: 100 μm (13–16), 100 μm (17, 18).