Pacifimusotima eugethes ( Tams, 1935 ), 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 : 118

Pacifimusotima eugethes ( Tams, 1935) , comb. nov.

( Figs. 3 , 16 , 18, 20 )

Parthenodes eugethes Tams, 1935: 261–262 , pl. 15 fig. 7. TL: Samoa, Upolu, Malololelei.

Diagnosis. This species is morphologically very similar to Pacifimusotima kosrena Ko & Solis , sp. nov., but can be distinguished by the following characteristics: a Y-shaped band is present in the basal area of the forewing; the discal reniform patch on the forewing is present; there is an ovate patch in the postmedial area of the hindwing. In the male genitalia, the apex of the uncus is more blunt than that of P. kosrena sp. nov.; the gnathos is wider and more blunt than that of P. kosrena sp. nov.; the phallus has a club-shaped cornutus. In the female genitalia, the ductus and corpus bursae are broader than those of P. kosrena sp. nov.

Redescription. Adult ( Fig. 3 ). Length of forewing 11–14 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 area of forewing with a brown Y-shaped band; median area with a brown reniform patch; postmedial fascia brown, Wshaped and edged with dark brown lines on both sides, except near M 3; Ground color of hindwing white; postmedial area with an ovate patch from M 2 to CuP; fringe white. Abdomen white.

Male genitalia ( Fig. 16 ). Uncus elongated, strongly sclerotized, and weakly curved and blunt at tip; gnathos elongated, strongly sclerotized, about 2/3 length of uncus; 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 club-shaped cornutus.

Female genitalia ( Fig. 18 ). 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.

Material examined. (2 ♂, 1 ♀), SAMOA: 2 ♂, Western Samoa , Upoulu Island , Apia District, Letava, 1800’, 16–17.XI.1976, (D. & M. Gaskin), USNMENT01894135; USNMENT01894129, USNM genitalia slide no. 116392 ; 1 ♀, same locality, USNMENT01894141, USNM genitalia slide no. 116391 .

Distribution. Samoa.

Host plants. Unknown.

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 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.