Pacifimusotima kosrena Ko & Solis, 2024

Pacifimusotima kosrena Ko & Solis , sp. nov.

( Figs. 1 View FIGURES 1−8 , 9–14 View FIGURES 9–10 View FIGURES 11–13 View FIGURES 14−16 , 17, 19 View FIGURES 17−20 )

Type materials. Holotype: ♂, MICRONESIA, KOSRAE: Okat , 09.XI.2022, (Jung S. W., Kim Y. H., Ko J. H.), ( N5 ˚20'41.4″, E162 ˚58'15.5″ Alt.: 3 m), genitalia slide no. DIC-051.

Paratypes. ( 16 ♂, 3 ♀), MICRONESIA: 6 ♂, KOSRAE: Okat, 09.XI.2022, (Jung S. W., Kim Y. H., Ko J. H.), ( N 5˚20'41.4″, E 162˚58'15.5″ Alt.: 3 m); 1 ♀, Sipyen waterfall, 10.XI.2022, (Jung S. W., Kim Y. H., Ko J. H.), ( N 5˚17'02.9″, E 162˚57'25.5″Alt.: 17m), genitalia slide no. DIC-052; 2 ♂, Okat, 14.II.2023, (Jung S. W., Kim Y. H., Ko J. H.), ( N 5˚20'34.0″, E 162˚58'35.0″Alt.: 8 m), genitalia slide no. DIC-100; 1 ♂, Tafunsak, 15.II.2023, (Jung S. W., Kim Y. H., Ko J. H.), ( N 5˚22'06.0″, E 163˚00'02.0″Alt.: 5 m), genitalia slide no. DIC-101; 1 ♂, Tofol, 16.II.2023, (Jung S. W., Kim Y. H., Ko J. H.), ( N 5˚19'42.0″, E 163˚00'40.0″Alt.: 2 m), genitalia slide no. DIC-095; 2 ♂, Mutunlik, Alt.: 22 m, 8.II.1953, (Clarke, J. F. G.), light trap, USNMENT01894167, USNM genitalia slide no. 116386 (handwritten Munroe label “ Parthenodes ” sp. 1); 1 ♂, Mutunlik, Alt.: 22 m, 6.II.1953, (Clarke, J. F. G.), light trap, USNMENT01899030, USNM genitalia slide no. 105165 (originally CNC slide # ER 460); 1 ♂, Mutunlik, Alt.: 22 m, 8.II.1953, (Clarke, J. F. G.), light trap, USNMENT01552840; 1 ♂, Mutunlik, Alt.: 22 m, 16.II.1953, (Clarke, J. F. G.), light trap, USNMENT01894098, USNM genitalia slide no. 116387; 1 ♂, Mutunlik, Alt.: 22 m, 26. I.1953, (Clarke, J. F. G.), light trap, USNMENT01374377; 1 ♀, Mutunlik, Alt.: 22 m, 15.II.1953, (Clarke, J. F. G.), light trap, USNMENT01374376 (handwritten labels: “ Parthenodes ” sp., not in B. M., nearest to eugethes Tams , det. E. L. Martin, 1953; species group placed in Parthenodes by Hampson, but are not Nymphulinae, E.L. Martin, 1953 (handwritten Munroe label “ Parthenodes ” sp. 1); 1 ♀, Wakap, Alt.: 490 m, 7.IV.1953. (Clarke, J. F. G.), light trap, USNMENT01552841, USNM genitalia slide no. 105166 (originally CNC slide #461).

Diagnosis. Pacifimusotima kosrena sp. nov. is morphologically very similar to P. eugethes (Tams, 1936) , but can be distinguished by the following characteristics: a basal band is present in the basal area of the forewing; the discal reniform patch on the forewing is absent; basal and postmedial bands are present on the hindwing. In the male genitalia, the apex of the uncus is more pointed than that of P. eugethes ; the gnathos is slender and more pointed than that of P. eugethes . In the female genitalia, the ductus bursae and corpus bursae are narrower than those of P. eugethes .

Description. Adult ( Figs. 1 View FIGURES 1−8 , 9–13 View FIGURES 9–10 View FIGURES 11–13 ). Length of forewing 11–13 mm in both sexes. Head covered with white scales; antennae prismatic, laterally compressed; ocellus and chaetosemata absent; labial palpus upturned, covered with white scales; maxillary palpus short, covered with white scales; proboscis well–developed. Patagium and tegula covered with white scales, except brown band at dorsal center. Ground color of forewing white; basal and antemedial area with brown bands; brown postmedial fascia W-shaped from terminal area; fringe white. Ground color of hindwing white; basal band brown; postmedial band brown, with dark brown line inner; fringe white. Abdomen white.

Male genitalia ( Fig. 14 View FIGURES 14−16 ). Uncus elongated, strongly sclerotized, and weakly hooked at tip; gnathos elongated, almost same length as uncus and pointed at tip; tegumen almost same length as transtilla; valva nearly subspatulate, weakly curved at costa; juxta membranous, broad; saccus U-shaped; phallus cylindrical, sclerotized basally, with a hook-shaped cornutus.

Female genitalia ( Fig. 17 View FIGURES 17−20 ). Papillae anales ovate; posterior apophyses long, almost same length as anterior apophyses; antrum funnel-shaped, membranous; ductus seminalis from near anterior beginning of ductus bursae; ductus bursae membranous, about 1/2 length of corpus bursae; corpus bursae membranous, ovate, without signum.

Distribution. Micronesia ( Kosrae), formerly known as Kusaie or Strong’s Island.

Host plants. Unknown.

Etymology. The specific name was derived from the type locality, Kosrae, Micronesia.