Cibyra yumiko sp. nov.

urn:lsid:zoobank.org:act: 58E24BDB-525E-4548-8CEC-6CA6FCE85B46

Pl. 8: Figs 5–7, Pl. 12: Fig. 2, Pl. 17: Fig. 6, Pl. 21: Fig. 6

Type material. Holotype ♂ (Pl. 8: Fig. 6): /Brasil-RS [Rio Grande do Sul], Morro Redondo, 19.III.2009, SIEWERT, R.R. [leg.]/ 24.096 Col. C. Mielke/ BC-CGCM/ DZ 52.638/ HOLOTYPUS, Cibyra yumiko C. Mielke, Grehan & Koike, 2024 / (DZUP) .

Paratypes (in total 10 ♂): Brazil. Rio Grande do Sul. Same data as holotype: 2 ♂ (CGCM 24.425, 24.649; DZUP) . Piratini, Passo da Invernada, 250–300m: 1 ♂, 26–27.III.1999, Prestes & Moser leg. (CGCM 24.940; CGCM) . Canguçu: 1 ♂, 10–18.III.2018, V.O. Becker leg (CGCM 39.587; CGCM) . Argentina. Entre Ríos. Colón, Parque Nacional El Palmar, Intendencia, 31°52‘7.57“S, 58°12‘30.13“W, 30 m, Núñez Bustos, C. Kopuchian & N. Garcia leg.: 1 ♂, 3.III.2011 (MACN-En 24561; MACN); 4 ♂, 6.III.2011 (MACN-En 24587, 24629, 24636, 25343; MACN); 1 ♂, 9.III.2011 (MACN-En 24607; MACN) .

Diagnosis. This and the previous species are unique among Cibyra in having a pronounced mesal antero-ventral projection of the pseudotegumen (Pl. 17: Figs 5–6; see upper arrow). However, C. yumiko sp. nov. can be distinguished by the emargination of the posterior margin of saccus, occupying 1/5 of saccus width, while 1/ 3 in C. munona, thus wider in the latter (Pl. 17: Figs 5–6; see arrows), and by the tergal lobes not protruding, in contrast to C. munona .

Description. Male (Pl. 8: Figs 5–7, Pl. 12: Fig. 2). Forewing length: 11–16 mm, wingspan: 26–33 mm. Epiphysis absent.

Male genitalia (Pl. 17: Fig. 6, Pl. 21: Fig. 6). Tergal lobes not protruded. Saccus with posterior edge notched mesally, occupying about 1/5 of its total length. Tegumen slightly sinuate. Pseudotegumen expanded and projected ventrally, ribbed ventro-anteriorly. Fultura inferior cup-like, distally bilobed, and 1.1 times longer than wide.

Female. Unknown.

Distribution. Known from a few places in southeastern Rio Grande do Sul, southern Brazil (Pl. 28: Fig. 2).

Etymology. Homonym in honour of the late Yumiko Miyashita, feminine. It is treated as a noun in the nominative singular in apposition.

Remarks. The relatively small type series has revealed that this new species shows different phenotypes, especially concerning the FW inner area, greyish-white and orangish-brown, and postdiscal band or line, white or dark brown. This variation is also found in the similar C. munona . Allopatric to all congenerics.