Adela palella Koo & Cho 2022, sp. nov.
Creators: name: Koo, Jun-Mo
name: Cho, Soowon
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Adelidae
Adela
Adela palella

description: Adela palella Koo & Cho, sp. nov.
(Korean name: bo-la-bich-bi-dan-gin-su-yeom-na-bang)
(Figs 1A–K; 2A–F; 3A–H; 4A –F')
LSID: urn:lsid:zoobank.org:act: 0BB29E30-2198-4C23-9164-94F9E21A5D93
Type specimens. • Holotype: male, Korea, Gaesin-dong, Seowon-gu, Cheongju-si, Chungcheongbuk-do, N36°37′44.50″ E127°27′06.60″, Alt. 68 m, coll. S.K. Kim & J.M. Koo, 19.iv.2017, genitalia in a tube containing glycerin under the specimen (except left valva, juxta and aedeagus), gen. slide no. KJM0210, wings slide no. KJM0141 (with the right antenna), COI barcode CBNU228 (GenBank accession no.: MZ 848405), deposited in NIBR (Specimen accession no.: NIBRIN0000855173).
Paratypes 2♀: • 1♀, Korea, Gaesin-dong, Seowon-gu, Cheongju-si, CB [Chungcheongbuk-do], N36°37′43.39″ E127°27′02.71″, Alt. 67 m, 26.vi.2017, coll. J.M. Koo, gen. slide no. KJM0211 (mounted laterally), wings slide no. KJM0208, COI barcode CBNU229 (GenBank accession no.: MZ 848406), deposited in CBNU (Specimen accession no.: CBNUPM000021); 1♀, Korea, Secheon-dong, Dong-gu, Daejeon, N36°18′07.84″ E127°28′47.22″, Alt. 548 m, 30.iv.2017, coll. J.D. Kim, gen. slide no. KJM0212 (mounted dorsally), wings slide no. KJM0207, COI barcode CBNU230 (GenBank accession no.: MZ 848407), deposited in CBNU (Specimen accession no.: CBNUPM000022).
Diagnosis. The species is superficially similar with A. reaumurella (Linnaeus, 1758), but there are several distinguishable characters in the adult: 1) in the male of the new species vertex with raised black hairs and sparse few brownish-yellow hairs, but in the male of A. reaumurella vertex with only black hairs; 2) in the female of the new species antenna not thickened basally, but in the female of A. reaumurella antenna thickened in basal ¼. Furthermore, it can be distinguished from the latter by the male genitalia: 1) in the new species the area between dorsal corner and the triangular process of valva concave, while in A. reaumurella the area flat; 2) in the new species the length of ventral margin of valva 0.5× shorter than the length of valva, while in A. reaumurella the length of ventral margin of valva about 0.3× shorter than the length of valva; 3) in the new species juxtal head of the same length as the width, while in A. reaumurella juxtal head about 1.5× longer than the width.
Note: When comparing the barcode sequences obtained from three specimens of the new species (showing 100% concordance rate) with those of A. reaumurella registered in NCBI and BOLD systems, it shows a similarity rate of 96.01–96.20% and 95.81–96.56%.
Description. Adult of both sexes (Figs 1A–K; 2A; 3A–H; 4A –B'). Forewing length 6.0– 7.5 mm.
Head: Male (Figs 1A –D', F–K). Vertex with raised black hairs, mixed with sparse few brownish-yellow hairs; clypeus silvery black with black hairs laterally, and with sparse brownish-yellow hairs on upper margin and between antennae (Figs 1 A', B). Antenna filiform, about 2.8× longer than the length of forewing; scape clubhead-shaped, dark bronzy with dense black hairs ventrally; pedicel dark bronzy; flagellum dark bronzy in 1 st –3 rd segments, then outer surface silvery white until basal half, then entirely silvery white distally; 1–2 hook-shaped flagellar pegs pointing anteriorly on the dorsal side of flagellar 9–10 th segments, and each peg with two teeth in a row ventrally (one peg on flagellar 9 th segment of the right antenna and one peg on each of flagellar 9 th and 10 th segments of the left antenna, from one male specimen examined in this study); antennal sensillae visible ventrally through the ventral scales-free zones; each zone isolated in a squarish shape by a row of scales until basal ¼ of flagellum, the squarish zones then interconnected and narrowed area of dispersed scales until the half of flagellum, then the interconnected zones re-isolated into single scale-free zones until the distal end of flagellum; the number of sensillae rapidly decreasing beyond the basal half of flagellum (Figs 1A, F–K). Labial palpus short, same length as scape; 2 nd segment dark bronzy with few silvery-white scales, and with white hairs sparsely on the inner and dorsal surface and black hairs on the outer and ventral surface, particularly dense hairs ventrally; 3 rd segment dark bronzy with white scales, about 0.5× shorter than the length of 2 nd segment (Figs 1D, D'). Proboscis covered with black hairs and white sensillae without scales (Fig. 1C).
Female (Figs 3A –G'''). Vertex with raised brownish-yellow hairs, intermixed with few black sparse hairs; clypeus silvery black with black and brownish-yellow hairs laterally, and with sparse brownish-yellow hairs situated on upper margin and between antennae (Figs 3B, E). Antenna filiform, about 1.6× longer than the length of forewing; scape and pedicel the same as in male, except hairless scape; flagellum dark bronzy in basal 3/5 dorsally and laterally, and in basal 4/5 ventrally, then silvery white distally; antennal sensillae visible ventrally through the scales-free zones; each zone well-isolated into a squarish shape by a row of scales, and progressively smaller distally; the number of sensillae rapidly decreasing beyond basal 3/5 (Figs 3A, F, G –G'''). Labial palpus short, of the same length as scape; 2 nd segment dark bronzy with silvery-white scales, with particularly dense black hairs ventrally; 3 rd segment the same as in male (Figs 3C, D). Proboscis with sensillae under dark bronzy scales, without hairs (Fig. 3C).
Thorax: Male (Figs 1 A', E; 2A). Thorax bronze green with two elliptical patches side by side formed by black scales under long appressed black hairs (Fig. 1E). Tegula bronze green (Fig. 1E). Forewing bronze green with purplish-lustered costal fringe and bronze-green dorsal fringe; costa weakly concave between basal 1/5 and distal ⅓ (Fig. 1 A'); venation (Fig. 2A) with free R veins; distance between origins of R 3 and R 4 of the same length as that of R 4 and R 5; R 5 reaching before apex; M veins free; CuA 1 arising from lower corner of discal cell; origins of CuA 1 and CuA 2 separated by the same distance as from M 1 to CuA 1; 1A+2A forked at about basal ¼; discal cell well-closed. Hindwing grayish brown with purplish luster, with one long frenulum; fringe bronze green, dark brown and orange white; Sc+R 1 long; Rs free from M 1; M 1 and M 2 stalked at about basal 1/6; discal cell well-closed.
Female (Figs 3A, B, H; 4A –B'). Thorax bronze green without hairs and patches (Fig. 3B). Tegula concolorous (Fig. 3B). Forewing the same as in male except 1A+2A forked at about basal ⅓ (Figs 3A; 4A, B). Hindwing of the same color as male, with 4–6 frenula (Figs 3A; 4 A', B'), one in each of sockets arranged in a row; venation same as male except M 1 and M 2 stalked at base. Hindtibia bronze green with purplish-lustered scales, paler inner surface than outer surface, with long dark brown bristles dorsally; two pairs of spurs, one pair at basal half and the other pair at apex (Fig. 3H). Hindtarsus covered with bronze-green and silvery-white scales (Fig. 3H).
Abdomen (Fig. 3A). Abdomen covered with dark purple scales.
Note: The colour of wings under sunlight at the time of collection was bronze green, but after the specimen dried, no greenish color is observed, only bronze-orange colour.
Male genitalia (Figs 2B–F): Uncus almost parallel-sided with concave posterior margin. Tegumen domeshaped, nearly of the same length as valva. Socius elliptical dome-shaped; the length of major axis about 1.9× longer than that of minor axis. Vinculum 2× longer than the length of valva, with slightly convex posterior margin; anterior margin obtuse; ventro-lateral margin dented 3 times in a row in posterior ¼ of vinculum; vinculum widest at posterior half; the longest axis of vinculum 1.7× longer than the widest axis. Transtilla with elongated triangular medi-posterior process and two anterior processes having rounded apex; medi-posterior process nearly of the same length as anterior process; anterior process slightly twisted. Valva trapezoidal, slightly convex in basal ⅔, then near straight distally; dorsal corner rounded with distinct triangular process; distal margin concave in dorsal ⅓, convex in ventral ⅔; ventral margin straight, 0.5× shorter than the length of valva with extremely pointed ventral corner. Juxta arrow-shaped, 0.5× shorter than the length of aedeagus; juxtal head shovelhead-shaped, about the same length as the width, with pointed barbs and extraordinarily obtuse apex. Aedeagus straight horn-shaped, of the same length as vinculum, slightly curved upwards towards anteriorly in basal ⅓.
Female genitalia (Figs 4C –D'). Apophyses posteriores nearly of the same length as apophyses anteriores. Vagina cup-shaped with one pair of guy-wires arising from one on each latero-anterior corner. Vestibulum without vestibulum lamella. Ductus seminalis arising from vestibulum, spiraled medially with internal canal. Spermatheca ovoidal, nearly of the same length and width as corpus bursae. Ductus bursae broadened from basal ¼ to half, then gradually narrower until distal ¼. Corpus bursae ovoidal, shorter about 0.5× than the length of ductus bursae. Common oviduct ventral, sharing its base with ductus bursae.
Female abdominal structures (Figs 4E –F'): 7 th tergite elongated triangular with rounded base angles; vertex angle pointing posteriorly. 7 th sternite broad with setae on posterior margin, forming incomplete cylinder in posterior half, with sharply pointed posterior end. 8 th segment roundly tapered arc-shaped, enclosed by 7 th tergite and sternite, ventro-medial anterior margin concave.
Distribution. South Korea (Cheongju-si & Daejeon).
Etymology. The specific epithet is derived from the Latin, pala (=shovel, spade) with the Latin diminutive suffix, -ella, referring to the shovelhead-shaped head of juxta in the male genitalia.
description: Published as part of 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, pp. 431-444 in Zootaxa 5138 (4) on pages 432-438, DOI: 10.11646/zootaxa.5138.4.5, http://zenodo.org/record/6571729