Pacifimusotima kosrena Ko & Solis, 2024

Ko, Jae-Ho, Solis, M. Alma, Lees, David C. & Albert, Austin, 2024, Pacifimusotima Ko & Solis, new genus and species of the Musotiminae (Lepidoptera: Crambidae) from the Federated States of Micronesia, including two newly combined species, Zootaxa 5497 (1), pp. 111-122 : 115

Pacifimusotima kosrena Ko & Solis , sp. nov.

( Figs. 1 , 9–14 , 17, 19 )

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 , 9–13 ). 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 ). 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 ). 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.

Figures

FIGURES 1−8. Adults of Pacifimusotima and Parthenodes spp. 1a. Pacifimusotima kosrena Ko & Solis, sp. nov., holotype, male, Kosrae, Micronesia; 1b. Pacifimusotima kosrena Ko & Solis, sp. nov., paratype, female, Kosrae, Micronesia; 2. Pacifimusotima rectangulalis comb. nov., male, Chuuk, Micronesia, USNMENT01894106, USNM genitalia slide no. 116393; 3. Pacifimusotima eugethes, comb. nov., male, Apia, Samoa, USNMENT01894135; 4. Parthenodes hydrocampalis (co-type), NHMUK015666233; 5. Parthenodes parallelalis (= P. paralleloidalis), holotype, Chanchamayo, Peru, NHMUK015666232; 6. Parthenodes bisangulata, holotype, Sikkim, India, NHMUK013699575; 7. Pacifimusotima rectangulalis, comb. nov., syntype, Ekeikei, Papua New Guinea, NHMUK010919370; 8. Parthenodes nigriplaga, syntype, Khasia Hill, Meghalaya, India, NHMUK013699595.

FIGURES 9–10. Head of Pacifimusotima kosrena Ko & Solis, sp. nov. 9. Dorsal view; 10. Lateral view.

FIGURES 11–13. Palpi and wing venation of Pacifimusotima kosrena Ko & Solis, sp. nov. 11. Labial palpus; 12. Maxillary palpus; 13. Wing venation.

FIGURES 14−16. Male genitalia of Pacifimusotima spp. 14a. P. kosrena Ko & Solis, sp. nov., holotype, DIC-051; 14b. P. kosrena Ko & Solis, sp. nov., paratype, DIC-101; 15. P. rectangulalis, comb. nov., USNMENT01994059, USNM genitalia slide no. 116394; 16. P. eugethes, comb. nov., USNMENT01894141, USNM genitalia slide no. 116391.

FIGURES 17−20. Female genitalia and tympanal organs of Pacifimusotima spp. 17. P. kosrena Ko & Solis, sp. nov., female genitalia, paratype, DIC-052; 18. P. eugethes comb. nov., female genitalia, USNMENT01894129, USNM genitalia slide no. 116392; 19. P. kosrena Ko & Solis, sp. nov., tympanal organ, paratype, DIC-101; 20. P. eugethes, comb. nov., tympanal organ, USNMENT01894141, USNM genitalia slide no. 116391.