Ectoedemia jacutica Puplesis, 1988

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 : 226-227

6. Ectoedemia jacutica Puplesis, 1988

( Figs. 41 , 51–53 , 57 , 63 )

Ectoedemia jacutica Puplesis, 1988: 26 ; Stonis et al. 2015: 117.

Ectoedemia species 219: Rocienė & Stonis 2013: 77.

Type locality: Yakutia , Yakutsk ( Russia) .

Material examined. JAPAN. Hokkaido: 1 ♂, Manzi, Iwamizawa , 15.vii.2012, H. Kogi ; 8 ♂, 6 ♀, Tomakomai , 1–15.vi.1970, host: Spiraea salicifolia, T. Kumata , genitalia slide no. SY172 ( SEHU) ; 5 ♂, 3 ♀, Tomakomai , 1–13.vi.1970, host: Spiraea salicifolia, T. Kumata. ( OPU) ; 17 ♂, 17 ♀, Kashiwabara, Tomakomai-shi , 1.x.2015, larvae on Spiraea salicifolia , ex. pupa 27.v–17.vi. 2016, genitalia slide no. SY189 ; 4 ♂, 3 ♀, 8.x.2017, larvae on Spiraea salicifolia , ex. pupa 20.v–22.vi.2018, S. Yagi. Honshu: [Akita Pref.] 5 ♂, 6 ♀, Kaginotaki, Ani, Akitashi , 24.ix.2017, larvae on Aruncus dioicus , ex. pupa 13.v–1.vi.2018, S. Yagi, DNA extraction no. SaY181 ; 1 ♀, Babatoshiyama Nikaho-shi , 24.ix.2017, larva on Aruncus dioicus , ex. pupa 19.v.2018, S. Yagi; [Iwate Pref.] 8 ♂, 6 ♀, Takinoue , 30.ix.1975, larvae on "Shoma"[= Aruncus dioicus ], 13.v–2.vi.1976, H. Kuroko ( OPU) ; 1 ♀, Mat- suoyoriki, Hachimantai-shi , 16.x.2016, larva on Aruncus dioicus , ex. pupa 29.v.2017, S. Yagi; [Miyagi Pref.] 8 ♂, 3 ♀, Okura, Aoba-ku, Sendai-shi , 14.x.2017, larvae on Aruncus dioicus , ex. pupa 30.iv–9.v.2018, S. Yagi ; 2 ♂, 1 ♀, Kumazawa-Rindo, Okura, Aoba-ku , Sendai-shi , 14.x.2017, larvae on Aruncus dioicus , ex. pupa 6–16.v.2018, S. Yagi; [Fukushima Pref.] 5 ♂, 3 ♀, Yaheishiro, Ine, Nishiaizu-machi , 21.ix.2017, larvae on Aruncus dioicus , ex. pupa 13.v–18.vi.2018, S. Yagi; [Nagano Pref.] 1 ♂, Shibu-onsen, Shiga-kogen , 18.x.1986, larva on Aruncus dioicus, H. Kuroko ( OPU) ; 1 ♀, Shiga-kogen , 30.v.1964, Host: Aruncus dioicus, H. Kuroko leg. ( OPU) ; 9 ♂, 12 ♀, Hirao, Yamanouchi-machi, Shimotakai , 17.ix.2017, larvae on Aruncus dioicus , ex. pupa 5–20.v.2018, S. Yagi ; 6 ♂, 7 ♀, Hijiri-kogen, Omi-mura , 20.x.2015, larvae on Spiraea salicifolia , ex. pupa 20.v–3.vii.2016, S. Yagi ; 3 ♂, Minenotyaya Karuizawa-machi Nagano-ken , 9.x.1989, larvae on Spiraea chamaedryfolia , ex. pupa 28.v–6.vi.1990, N. Hirano leg., genitalia slide NH-393, host no.728 ; 2 ♂, Minodo , 9.v.1970, host: "Shimotsuke" [= Spiraea japonica ], H. Kuroko leg. ( OPU) ; 4 ♂, 2 ♀, Minodo, Tamagawa, Chino-shi , 15.ix.2017, larvae on Spiraea chamaedryfolia , ex. pupa 1.vi.2018, S. Yagi ; 7 ♂, 7 ♀, Ichirino, ( Hakusan ), Ishikawa Pref., 9.x.1982, larvae on Aruncus dioicus, H. Kuroko ( OPU) . Kyushu : [Fukuoka Pref.] 8 ♂, 6 ♀, Hikosan , Fukuoka Pref., 20.vi.1956, host: "Shimotsuke" [= Spiraea japonica ], H. Kuroko ( OPU) .

Male. Forewing length 1.6–2.5 mm (n = 30), wingspan 3.8–5.5 mm (n = 30). Female. Forewing length 1.9–2.6 mm (n = 30), wingspan 4.2–5.8 mm (n = 30).

Diagnosis. This species is similar to E. spiraeae , but can be identified by the dark brown hair-pencil (yellowish white in E. spiraeae ), and the shorter and thicker sublateral process of the transtilla (long and thin in E. spiraeae ).

Barcode data. A DNA barcode of one specimen (BOLD: AAI9354) was generated and deposited in the Gen- Bank with accession number LC467970 . The barcode of this species is closest to that of E spiraeae based on BLAST in GenBank, and the similarity between them is 93.55%.

Biology. The Japanese population utilizes Spiraea salicifolia L., S. chamaedryfolia L. var. pilosa (Nakai) H. Hara , S. japonica L.f., and Aruncus dioicus (Walter) Fernald var. kamtschaticus (Maxim.) H. Hara. Eggs are deposited on the underside of the leaf. The leafmine starts as a linear gallery with blackish frass, later becoming a blotch with dense, narrow, blackish frass or dispersed frass. Larvae are pale greenish cream; found only in September and October, which indicates univoltinism. Adults emerged from May to July and a male was collected by light trap in July.

Distribution ( Fig. 63 ). Japan: Hokkaido, Honshu, Kyushu; Russia: Yakutsk, West Altai; China: Heilongjiang Sheng.

Remarks. This species was recorded from Japan in 2010 for the first time as E. spiraeae , then it was reported as E. jacutica in 2016 ( van Nieukerken et al. 2010; van Nieukerken et al. 2016). Japanese populations show some differences from the type specimen ( Stonis et al. 2015), i.e., the color of fascia of forewing is cream white (slightly shining in holotype) and the hair-pencil is conspicuous (inconspicuous in the holotype), whereas the male genitalia are very similar and difficult to distinguish. There are no sequence data for E. jacutica from the type locality or the area close by. Therefore, the identification of the Japanese population is tentative. For a more accurate identification, additional sampling in the type locality is necessary.

The morphology of Japanese E. jacutica is similar to that of “ Ectoedemia species 219”, which is treated as a member of the subbimaculella group (Rocienė & Stonis 2013). However, this specimen is similar to some species of the angulifasciella group, e.g., E. agrimoniae , E. spiraeae , and E. jacutica , in the absence of median carinae and the developed pseuduncus.

Figures

FIGURES 38–41. Adults of the Japanese Ectoedemia angulifasciella group, male 38. E. pilosae collected in Shimotakai-machi, Nagano Pref. 39. E. picturata collected in Ishikari-shi, Hokkaido Pref. 40. E. occultella collected in Kutchan-cho, Hokkaido Pref. 41. E. jacutica collected in Tomakomai-shi, Hokkaido Pref.

FIGURES 48–53. Male genitalia of the Japanese Ectoedemia angulifasciella group. 48, 49. E. occultella, genital capsule with phallus removed (Genitalia slide No. SY578). 50. Ditto, phallus (Genitalia slide No. SY578). 51, 52. E. jacutica, genital capsule with phallus removed (Genitalia slide No. SY189). 53. Ditto, phallus (Genitalia slide No. SY172).

FIGURES 54–57. Leafmines of the Japanese species of the Ectoedemia angulifasciella group. 54. E. pilosae on Agrimonia pilosa. 55. E. picturata on Rosa hirtula. 56. E. occultella on Betula platyphylla. 57. E. jacutica on Aruncus dioicus.

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.