Pacifimusotima rectangulalis (Kenrick, 1907), comb. nov.

(Figs. 2, 7, 15)

Parthenodes rectangulalis Kenrick, 1907: 77, pl. 4 fig. 58. TL: Papua New Guinea, Ekeikei; Dinawa.

Diagnosis. This species is morphologically similar to Pacifimusotima eugethes (Tams, 1935), but can be distinguished by the following characteristics: brown basal and black antemedial bands are present on the forewing (only a Yshaped basal band in P. eugethes); black broad marking near the dorsum on the forewing is present (absent in P. eugethes); wide broad marking of dark brown mixed with black patterns is present on the hindwing (dark brown an ovate patch in P. eugethes). In the male genitalia, the uncus is more curved than that of P. eugethes; the gnathos is more slender than that of P. eugethes; phallus has a hook-shaped cornutus (club-shaped in P. eugethes).

Redescription. Adult (Figs. 2, 7). Length of forewing 11–13 mm in both sexes. Head covered with yellow 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 band brown; antemedial band black; postmedial fascia brown, widely W-shaped, edged with black lines on both sides, except edge from M 2 to costal margin and a white line between M 1 and M 2; fringe white, except black from M 2 to M 3. Ground color of hindwing white; brown spread marking from basal to postmedial area; postmedial area with black undulate marking from M 1 to CuP; fringe white, except black from 1A+2A to 3A. Abdomen white.

Male genitalia (Fig. 15). 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, and tip of cornutus very pointed.

Female genitalia. Unknown.

Material examined. (2 ♂), PAPUA NEW GUINEA: 1 ♂, Gulf Prov. Ivimka Res. Sta., Lakekamu, 4. IV. 2000, (E. T. Sears), (07°44´S 146°30´E), USNMENT01994059, USNM genitalia slide no. 116394 ; MICRONESIA: 1 ♂, Chuuk, Bubu, 24.VIII.1957, (no collector name), USNMENT01894106, USNM genitalia slide no. 116393 .

Distribution. Micronesia (Chuuk), Papua New Guinea, Borneo (Whitaker et al. 2023).

Host plants. Unknown.