Coleophora fuscocuprella Herrich-Schäffer, 1855

Koo, Jun-Mo & Cho, Soowon, 2022, Two species of metallic Microlepidoptera, one new species of Adela Latreille [1796] (Adeloidea, Adelidae) and one unrecorded species of Coleophora Hübner 1822 (Gelechioidea, Coleophoridae), from Korea, Zootaxa 5138 (4), pp. 431-444 : 438-441

Coleophora fuscocuprella Herrich-Schäffer, 1855

(Korean name: gu-li-bich-tong-na-bang)

( Figs 5A–H ; 6A–F )

Coleophora fuscociliella ; Stainton, 1850: 25, nec Zeller, 1849 (misidentification).

Coleophora fuscocuprella Herrich-Schäffer, 1855: 230 . Type locality: Germany, Regensburg .

Coleophora fuscocuprella ; Toll 1953: 75; Toll 1962: 620; Patzak 1974: 239; Vives 1988: 77; Emmet et al. 1996: 228; De Prins 2003: 88; Baldizzone van der Wolf & Landry, 2006: 58; Buschmann & Richter 2015: 32; Baldizzone 2019: 89.

Material examined. 1♂, Korea, KNU [Kangwon National University], Chuncheon-si, GW [ Gangwon-do ], 2.v.2003, coll. H.L. Han, gen. slide no. KJM0189, wings slide no. KJM0209, Specimen accession no. CBNUPM000023 ; 1♂, Korea, Hansu-myeon, Jecheon-si , CB [Chungcheongbuk-do], N36°51′58.36″ E128°05′13.92″, Alt. 220 m, 21–22.v.2015, coll. J.M. Koo, gen. slide no. KJM0233, Specimen accession no.: CBNUPM000024 .

Diagnosis. This species, along with C. ahenella Heinemann, 1876 and C. violacea ( Ström, 1783) , has similar superficial characters such as small size and dark metallic luster, but is clearly distinguished from the others by the male genitalia: 1) in C. fuscocuprella the median stem of tegumen rectangular, about 1.1× higher than width, whereas in C. ahenella and C. violacea the median stem of tegumen relatively elongated, about 1.3× higher than width; 2) in C. fuscocuprella sacculus with angled dorsal corner and strongly curved ventral corner, without protuberance, whereas in C. ahenella sacculus with rounded triangular protuberance on dorsal corner, and in C. violacea sacculus with blunt triangular protuberance on ventral corner.

Redescription. Adult of male ( Figs 5A–H ). Forewing length 4.0– 4.5 mm.

Head ( Figs 5A –F'). Vertex covered with dark bronze-brown scales ( Fig. 5B ). Postocular scales dark brown without luster ( Fig. 5C ). Antenna about 0.7× shorter than the length of forewing; scape and pedicel dark bronzebrown; flagellum thickened by dark bronze-brown scales in near basal half, then alternately ringed with white rings; antennal sensillae white, visible through gaps between scales ( Figs 5A, D –E'). Labial palpus 2.8× longer than the horizontal diameter of compound eye; 2 nd segment covered with orange-white and dark brown scales on outer surface, and with orange-white scales on inner surface; 3 rd segment 0.7× shorter than 2 nd segment, dark brown on outer surface, and orange white on inner surface ( Figs 5F , F'). Proboscis covered with orange-white scales ( Figs 5B, C ).

Thorax ( Figs 5A, G–H ). Thorax dark bronze brown with concolorous tegula. Forewing bronze brown with concolorous fringe; costa slightly arched entirely ( Fig. 5A ); venation ( Fig. 5H ) with R 1 arising from basal half of discal cell; distance between origins of R 1 and R 2 1.4× longer than that of R 2 and R 3; R 4+5 reaching before apex; R 4+5 and M 1 stalked at basal ⅛ of R 4+5; CuA 1+2 arising from lower corner of discal cell; 1A+2A forked at basal ⅓; discal cell open. Hindwing bronzy grayish brown with frenulum at base; fringe bronzy grayish brown; costa arched at basal ⅓; Rs reaching before apex; discal cell open. Hindtibia and tarsus bronze brown on outer surface, orange white on inner surface; orange-white bristles present dorsally on hindtibia ( Figs 5G , G').

Abdomen ( Fig. 5A ): Abdomen covered with dark bronze-brown scales.

Male genitalia ( Figs 6A –D'): Gnathos knob triangular-shaped, slightly curved; basal arm of gnathos setose, 1.5–1.7× longer than vertical length of gnathos knob, 0.3–0.4× narrower than maximum width of gnathos knob. Tegumen with short pedunculus; median stem of tegumen rectangular, setose laterally, about 1.1× higher than the width, slightly constricted laterally, concave ventrally; pedunculus well-dilated outwardly, 0.3× shorter than the height of median stem of tegumen. Transtilla linear, joined at middle. Valvula subtriangular-shaped, setose at distal half; half of valvula free from sacculus; costal base slightly convex. Cucullus short with obtuse apex, setose. Sacculus small, setose along distal and ventral margin; dorsal margin short with angled dorsal corner; distal margin oblique with strongly curved ventral corner; ventral margin slightly convex. Phallotheca sclerotized, strongly curved-shaped, bent in basal half, then straight and gradually narrowed toward sharply pointed apex; sharp teeth (13 teeth in one specimen and 14 teeth in the other specimen, from the two specimens examined in this study) forming a line along left latero-ventral outer surface of phallotheca, one tooth present or absent on right latero-ventral outer surface. Aedeagus stout, membranous. Annulus hardly visible. Vesica membranous, strongly bent at middle, with spine-like cornuti forming bent claw-like formation; cornuti dense and short at base, gradually longer distally.

Female genitalia: See ( Baldizzone 2019: Tav. GF X, Fig. 28).

Abdomen ( Figs 6E, F ): No posterior lateral struts. Transverse strut nearly straight with weakly sclerotized anterior margin, and with strongly sclerotized posterior margin, posterior margin either sclerotized evenly or only laterally. Tergal disks of 1 st and 2 nd segments expanded and merged into one. 3 rd tergal disk about 2× longer than width, with 26–36 conical spines; 7 th tergal disk with 0–6 conical spines. Anterior margin of 8 th tergite sclerotized. 1 st –6 th sternites well sclerotized; 7 th sternite with sclerotized anterior margin; anterior edge of 8 th sternite sclerotized laterally.

Distribution. Palearctic: Western, Central and Northern Europe, Russian Far East ( Baldizzone et al. 2006), Korea (new record).

Figures

FIGURE 5. Male of Coleophora fuscocuprella Herrich-Schäffer, 1855. A, adult; B, anterior view of head; C, lateral view of head; D, dorsal view of antenna; D', close-up dorsal view of basal antenna; E, ventral view of antenna; E', close-up ventral view of basal antenna; F, outer view of labial palpus; F', inner view of labial palpus; G, outer view of hindleg; G', inner view of hindleg; H, venation, wings slide no. KJM0209.

FIGURE 6. Male of Coleophora fuscocuprella Herrich-Schäffer, 1855. A, genitalia; B, tegumen+gnathos knob; C, phallus; C' & D, close-up of teeth on phallotheca; C'' & D', close-up of spine-like cornuti; E & F, abdomen (A, C–C'' & E, gen. slide no. KJM0189; B, D, D' & F, gen. slide no. KJM0233); G, morphological terms used in describing abdominal characters. Abbreviations: as—anterior lateral strut, ts—transverse strut, ps—posterior lateral strut, td—tergal disk (all for abdomen).