Ectoedemia orbiculata Diškus, Remeikis & Stonis, 2020

Stonis, Jonas R., Remeikis, Andrius, Diškus, Arūnas & Navickaitė, Asta, 2020, Documenting new and little known leaf-mining Nepticulidae from middle and southwestern areas of the Asian continent, Zootaxa 4881 (3), pp. 401-452 : 419-420

publication ID	https://doi.org/ 10.11646/zootaxa.4881.3.1
publication LSID	lsid:zoobank.org:pub:7AAE442F-779B-40C6-ABD9-04BCB3B4777B
DOI	https://doi.org/10.5281/zenodo.4333323
persistent identifier	https://treatment.plazi.org/id/ADB5203C-E64D-4AA8-81D8-44BCDA1F1457
taxon LSID	lsid:zoobank.org:act:ADB5203C-E64D-4AA8-81D8-44BCDA1F1457
treatment provided by	Plazi
scientific name	Ectoedemia orbiculata Diškus, Remeikis & Stonis
status	sp. nov.

Treatment

Ectoedemia orbiculata Diškus, Remeikis & Stonis , sp. nov.

( Figs 6 View FIGURES 1–6 , 26–28 View FIGURES 16–28 , 39–52 View FIGURES 39–45 View FIGURES 46–52 , 137–157 View FIGURES 137–142 View FIGURES 143–152 View FIGURES 153–157 )

urn:lsid:zoobank.org:act:ADB5203C-E64D-4AA8-81D8-44BCDA1F1457

Type material. Holotype: ♂, India, Uttarakhand, Dehradun Distr., Mussoorie , 30°27’46”N, 78°04’17”E, eleva-tion ca. 2000 m, feeding larva on Spiraea canescens , 11.viii.2010, A. Diškus & A. Navickaitė, genitalia slide no. AD 489♂ ( ZIN) GoogleMaps . Paratypes: 2 ♂, 5 ♀, same label data as holotype, genitalia slide nos AD GoogleMaps 498♂, AD 487♀ ( ZIN) ; 1 ♂, 2 ♀, same label data as holotype, 10–13.viii.2010, A. Remeikis & J. R. Stonis, genitalia slide nos RA GoogleMaps 271♂, RA 270♀, RA 272♀ ( ZIN) ; 1 ♂, Rishikesh , 30°07’40”N, 78°19’03”E, elevation ca. 450 m, at light, 07.viii.2010, A. Šimkevičiūtė, genitalia slide no. AG GoogleMaps 129♂ ( ZIN) .

Diagnosis. This new species belongs to the Ectoedemia angulifasciella species group. Ectoedemia orbiculata sp. nov. is the most similar to, and probably closely related to, the European E. spiraeae Gregor and Povolný and Siberian E. jacutica Puplesis. Currently E. orbiculata was COI barcoded by us.

Externally, the speckled forewing with a tornal spot distinguishes males of E. orbiculata from all species of the E. angulifasciella group, possessing a distinctive forewing fascia. However, the fasciated females of E. orbiculata can be confused with other species of the group. From the related E. spiraeae , the males of new species differ in tufts of the wings: forewing underside of E. orbiculata is characterized by the presence of specials scales along the costal margin ( Fig. 46 View FIGURES 46–52 ), absence of a tuft ( E. spiraeae is with a white tuft of piliform scales), and hindwing upper side with a brown hair pencil ( Fig. 51 View FIGURES 46–52 ) (yellowish white in E. spiraeae ).

From the similar E. jacutica , the males of new species differ in forewing underside which is characterized by the presence of special scales along the costal margin ( Fig. 46 View FIGURES 46–52 ), absence of a tuft ( E. jacutica with an ochre-brown tuft of piliform scales, Fig. 54 View FIGURES 53–57 ), and hindwing upper side of E. orbiculata with a brown hair pencil ( Fig. 52 View FIGURES 46–52 ) (ochrebrown, indistinctive in E. jacutica , Fig. 57 View FIGURES 53–57 ).

In the genitalia, the large apical process of the valva, and apically very slender pseuduncus in the male genitalia, distally bent anterior apophyses, oval signa, tube-like vesicle, very large terminal part (forming up to one half of the female genitalia length) distinguish E. orbiculata from E. spiraeae ; from E. jacutica , the new species differs in the absence of a proximal excavation of vinculum ( Fig. 158 View FIGURES 158–166 ), smaller apical process of valva and the presence of basal joint between valvae ( Fig. 137 View FIGURES 137–142 ).

The round blotch-like part of the leaf mine of E. orbiculata is also distinctive and specific ( Fig. 27 View FIGURES 16–28 ).

Male ( Figs 43–52 View FIGURES 39–45 View FIGURES 46–52 ). Forewing length 2.1–2.3 mm; wingspan 4.6–5.1 mm (n = 5).

Head. Frons and palpi cream, frontal tuft orange ochre; collar cream, comprised of short piliform scales; antenna as half the length of forewing; flagellum grey-brown.

Thorax. Tegula, thorax and forewing densely speckled with brown-black scales; forewing with an indistinctive, greyish cream tornal spot; fringe cream, with a fringe line; forewing underside dark grey, with special scales along costal margin ( Figs 46–48 View FIGURES 46–52 ). Hindwing grey, with brown hair pencil on upper side; fringe grey. Legs ochre cream, with dark grey to black scales on upper side.

Abdomen. Brown to grey-brown, with some purple iridescence on upper side, greyish cream to grey-brown on underside; genital plates cream; anal tufts brown, inconspicuous.

Genitalia ( Figs 137–157 View FIGURES 137–142 View FIGURES 143–152 View FIGURES 153–157 ) with capsule about 250–275 µm long, 200–205 µm wide. Pseuduncus ( Figs 138, 139 View FIGURES 137–142 , 145 View FIGURES 143–152 ) slender distally. Valva ( Figs 137, 139, 142 View FIGURES 137–142 , 144, 148 View FIGURES 143–152 ) 160–170 µm long, with a large apical process, basally with a joint ( Figs 137, 140–142 View FIGURES 137–142 ). Juxta ( Figs 140–142 View FIGURES 137–142 ) membranous and inconspicuous. Vinculum with moderately long ( Figs139 View FIGURES 137–142 , 143, 144 View FIGURES 143–152 ) or small lateral lobes ( Figs 137, 142 View FIGURES 137–142 , 148 View FIGURES 143–152 ) (note that length of the lobes depends on genitalia prepararation and in older genitalia mounts the lateral lobes of vinculum usually look shorter). Phallus ( Figs 149–152 View FIGURES 143–152 ) 240–250 µm long, with numerous, tiny spine-like cornuti ( Fig. 147 View FIGURES 143–152 ), but without lateral carinae.

Female ( Figs 39–41 View FIGURES 39–45 ). Forewing length 2.2–2.4 mm; wingspan 4.7–5.4 mm (n = 5). Similar to male, but fore-wing with a distinctive, yellowish cream fascia. Genitalia ( Figs 153–157 View FIGURES 153–157 ) 550–665 µm long. Abdominal apex trun-cated, with short setae; Anterior and posterior apophyses equal in length; anterior apophyses bent inwardly ( Figs 153, 154 View FIGURES 153–157 ). Corpus bursae with two large, oval-shaped signa ( Figs 153, 154, 157 View FIGURES 153–157 ); one signum is slightly shorter ( Fig. 157 View FIGURES 153–157 ). Ductus spermathaecae with 3.5–4 coils and a tube-like vesicle ( Fig. 156 View FIGURES 153–157 ).

Bionomics ( Figs 6 View FIGURES 1–6 , 26–28 View FIGURES 16–28 , 42 View FIGURES 39–45 ). Host plant is Spiraea canescens D. Don. (Rosaceae) , a plant native in northern Pakistan to the Himalaya. Larvae mine in leaves in August. Larva pale green, with dark green intestine and brown head ( Fig. 28 View FIGURES 16–28 ). The leaf mine starts as a slender gallery filled with brown-black or black frass ( Fig. 26 View FIGURES 16–28 ); distally the leaf mines expand to a round blotch ( Fig. 27 View FIGURES 16–28 ), with frass scattered irregularly. Cocoon ochre-brown to reddish brown, 2.0– 2.2 mm long, 1.2–1.5 mm wide ( Fig. 42 View FIGURES 39–45 ). Adults fly in September.

Distribution. Known from a few localities in the western Himalaya, Uttarakhand, at the elevation of about 450–2000 m ( Fig. 1 View FIGURES 1–6 : wHi), but the host plant has a much wider distribution.

Etymology. The species name is derived from Latin orbiculatus (round, globosus), in reference to the round leaf mine of this species.