Dahlica (Dahlica) somae 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 : 53-56

Dahlica (Dahlica) somae Roh & Byun sp. n. Figs 5-12, 24-27, 28, 32, 33

Type material.

Holotype. ♂, Korea: Daejeon, Mt. Heungnyongsan, 15.ii.2015, S.J. Roh & D.S. Kim, genitalia mounted on 80% glycerol solution, genitalia No. KNAESJ01, scales of forewing mounted on 80% glycerol solution, scales of forewing No. KNAESSJ01, venation of forewing No. KNAEVSJ01, DNA barcode accession No. MF508656. Deposited at SEL/ HNU.

Paratypes. 2♂, 1♀. Korea: 1♂ Daejeon, Isa-dong, 2.ii.2015, S.J. Roh, genitalia mounted on 80% glycerol solution, genitalia No. KNAESJ02, scales of forewing mounted on 80% glycerol solution, scales of forewing No. KNAESSJ02, venation of forewing No. KNAEVSJ02, DNA barcode accession No. MF664099; 1♂ Daejeon, Mt. Heungnyongsan, 6.iii.2017, S.J. Roh & D.S. Kim, genitalia mounted on 80% glycerol solution, genitalia No. KNAESJ03; 1♀ Mt. Heungnyongsan, 6.iii.2017, S.J. Roh & D.S. Kim, DNA barcode accession No. MF664100. Deposited at SEL/ HNU.

Diagnosis.

Male of this species is superficially similar to D. triquetrella ( Hübner, 1813), but can be distinguished by a slightly longer transtilla and a relatively short ampulla of the male genitalia (lateral aspect). This species can be readily differentiated by the veins of the male hindwing; M2 and M3 originate at the apical corner of the posterior part of the discoidal cell. Female apophyses posteriores 1.75 times longer than apophyses anteriores.

Description.

Adult. Male (Figs 5-12). Wingspan 12.3-13.4 mm (Table 2). Coloration and vestiture: Vertex of head roughly covered with grayish brown hairs. Thoracic notum covered with blackish brown hairs. Upper side of forewing: ground color grayish black; white spots present regularly; scales (Fig. 10) slightly narrow and evenly widened apically; apical margin usually produced into two to four laciniations (classes 2-4) (Table 2). Hindwing covered with grayish white scales; postmarginal part present with slight long shiny white hairs. Structure: head and compound eyes slightly large; ocelli absent. Antennae (Fig. 8) filiform, longer than 2/3 forewing. Forewing: slightly long and narrow; costa straight; termen shortly arched to posterior margin, discoidal cell 0.64 times as long as forewing; venation (Fig. 28) with nine veins, originating at the discoidal cell; accessory cell present; intercalary cell absent; Sc arising with 3/5 costa; R2 and R3 originating at corner of accessory cell; R4 and R5 fused and originating at apical corner of anterior part of the discoidal cell reaching to the apex; M1 and M2 parallel; M2 and M3 stalked at apical corner of posterior part of the discoidal cell; Cu1 and Cu2 parallel. Hindwing (Fig. 28): costa straight; discoidal cell 0.51 times as long as hindwing; Sc straight to 4/5 costa; R terminating at apex; M1 and M2 parallel, M2 and M3 originating at apical corner of posterior part of the discoidal cell (Table 2); Cu1 and Cu2 parallel to tornus. Legs: epiphysis absent (Fig. 9); femora and tibiae covered with brown hairs; tarsi covered with grayish brown scales.

Female (Figs 24-27). Adult 4.2 mm in length. Coloration: Head, meso-, and metanotum dark brown. Membranous areas of abdomen yellowish brown. Abdomen covered with light brown scales; corethrogyne densely covered with white hairs on ventral part only. Structure: apterous. Head and compound eyes small, antennae slightly developed with basal flagellomeres 17 segmented, bipectinated. Legs well developed with tarsi divided into four tarsomeres; hind legs present with apical spurs.

Male genitalia (Figs 11, 12). In lateral aspect. Genitalia index, 1.46-1.56 (Table 2). Dorsum gently curved. Saccus very short; ampulla narrow and short with club shape, setae present sparsely; harpe short with hooked shape; phallus slender and very long with whip shape. In dorso-ventral aspect, uncus slightly concave; gnathos and juxta absent; valva slightly narrow, apical part of valva densely covered.

Female genitalia (Fig. 27). Oviscapt and ostium bursae well sclerotized. Apophyses posteriores 1.75 times longer than apophyses anteriores, very slender. Sclerotizations of the seventh sternite present with bundle of hairs

Larval case (Figs 32, 33). Length 4.0 mm. Larvae build their cases by putting together small sand particles, forming oval-shaped cases rather than angular cases.

Distribution.

Korea.

DNA barcode.

DNA barcode sequences were generated from three individuals. Multiple alignments using the BLAST tool in the NCBI database showed the following species as nearest neighbor: Dahlica charlottae with a similarity between 97 and 95%.

Etymology.

The species is named in honor of Ms. Da-Som Kim, collector of the material.