Dahlica (Dahlica) ochrostigma Roh & Byun

Roh, Seung Jin, Lee, Bong-Woo & Byun, Bong-Kyu, 2018, Two new species of the genus Dahlica Enderlein (Lepidoptera, Psychidae) from Korea, ZooKeys 733, pp. 49-64 : 56-59

Dahlica (Dahlica) ochrostigma Roh & Byun sp. n. Figs 13-19, 20-23, 29, 34, 35

Type material.

Holotype. ♂ Korea: Gangwon-do, Taebaek-si, Changjuk-dong, 6.iii.2015, S.J. Roh & J.H. Jeon & T.H. Yoo, genitalia mounted on 80% glycerol solution, genitalia No. KNAESJ04, scales of forewing mounted on 80% glycerol solution, scales of forewing No. KNAESSJ03. venation of forewing No. KNAEVSJ03, Deposited at SEL/ HNU.

Paratypes. 7♂, 3♀. Korea: 3♂, 2♀, Gangwon-do, Pyeongchang-gun, Nodong-ri, 6.iii.2015, S.J. Roh & J.H. Jeon & T.H. Yoo, male genitalia mounted in 80% glycerol solution, genitalia No. KNAESJ05, scales of forewing mounted in 80% glycerol solution, scales of forewing No. KNAESSJ04, venation of forewing No. KNAEVSJ04, DNA barcode accession No. of male MF508657, DNA barcode accession No. of female MF664101; 4♂, 1♀ Gangwon-do, Taebaek-si, Changjuk-dong, GW, 6.iii.2015, S.J. Roh & J.H. Jeon & T.H. Yoo, scales of forewing mounted in 80% glycerol solution, scales of forewing No. KNAESSJ05, DNAbarcode accession No. of female MF664102. Deposited at SEL/ HNU. Other material. 1♂ Korea: Gyeonggi-do, Paju-si, 2.iv.2007, B.W. Lee, genitalia mounted in 80% glycerol solution, genitalia No. KNAESJ06. Deposited at KNAE.

Diagnosis.

Male, this species is superficially similar to D. somae sp. n., but can be distinguished by slightly shorter antennae, a narrow forewing, and the venation of hindwing M3 stalked at 1/4 of M2. This species can be readily differentiated by the dorsum of male genitalia, which is strongly arched to the apical part and in the shape of a hat, and a very short phallus (lateral aspect). Female, apophyses posteriores 1.16 times longer than apophyses anteriores.

Description.

Adult. Male (Figs 13-19). Wingspan 9.8-11.2 mm (Table 2). Coloration and vestiture: Vertex of head roughly covered with short grayish brown hairs. Thoracic notum covered with brown hairs. Upper side of forewing: ground color gray with sparsely yellow spots; scales (Fig. 16) considerably narrow; apical margin usually produced into two to three laciniations (classes 1-2) (Table 2). Postmarginal part of hindwing present with long shiny white hairs. Structure: head slightly small, compound eyes relatively large; ocelli absent. Antennae filiform (Fig. 15), less than 1/2 forewing. Forewing: short and narrow; costa straight; apex strongly arched to termen, discoidal cell 0.67 times as long as forewing; venation (Fig. 29) with nine veins, originating at the discoidal cell; intercalary cell absent and accessory cell present; Sc reaching to 3/5 costa; R 4 and R5 fused; R3 and R4 + R5 originating at apical corner of anterior part of discoidal cell; M1 and M2 parallel; M2 and M3 stalked at apical corner of posterior part of the discoidal cell; Cu1 and Cu2 parallel. Hindwing (Fig. 29): costa straight; discoidal cell 0.52 times as long as hindwing; Sc straight and reaching to 4/5 costa; R originated at apical corner of anterior part of discoidal cell and reaching the apex; M1 and M2 parallel, M3 stalked at 1/4 M2 (Table 2); Cu1 and Cu2 parallel. Legs covered with shiny brown scales, epiphysis absent (Fig. 17).

Female (Figs 20-23). 4.5 mm in length. Coloration: Head dark-brown. Meso and metanotum red-brown. Membranous areas of abdomen yellow. Abdomen clothed with light brown scales; corethrogyne densely covered with yellowish white hairs at only ventral part. Structure: Apterous. Head slightly small, antennae relatively developed and long. Legs well developed, slightly long, tarsi 4-segmented.

Male genitalia (Figs 18, 19). In lateral aspect. Genitalia index, 0.79-1.08 (Table 2). Dorsum strongly arched to apical part with the shape of a hat. Saccus relatively short; ampulla slightly long and club shape, setae sparsely; harpe short with needle shape; phallus slender and short with whip shape. In dorso-ventral aspect, uncus slightly concave shape; gnathos and juxta absent; valva slightly narrow and apical part produced into weak rounded claviform.

Female genitalia (Fig. 23). Oviscapt and ostium bursae sclerotized. Apophyses posteriores 1.16 times longer than apophyses anteriores, slender. Sclerotizitions of seventh sternite present with bundle of hairs.

Larval case (Figs 34, 35). Length 3.6-3.9 mm. Their cases are superficially similar to those of D. somae sp. n.

Distribution.

Korea.

DNA barcode.

DNA barcode sequences were generated from three individuals (Table 1). Multiple alignments using the BLAST tool in the NCBI database showed the following species as nearest neighbor, Dahlica charlottae with a similarity between 96 and 94%.

Etymology.

The specific name is derived from the Greek words ochro and stigma (= pale spots), referring to the forewing pattern.