Cibyra stigmatica ( Pfitzner, 1937 )

Mielke, Carlos G. C., Grehan, John R. & Koike, Ricardo M., 2025, Review of the genus Cibyra Walker (Lepidoptera: Hepialoidea: Hepialidae) with descriptions of twenty-four new species from Brazil and Argentina, Zootaxa 5709 (1), pp. 1-74 : 17-18

Cibyra stigmatica ( Pfitzner, 1937)

Pl. 3 : Figs 1–5 , Pl. 10: Fig. 11 , Pl. 13: Fig. 5 , Pl. 15: Fig. 1 , Pl. 19: Fig. 11 , Pl. 23: Fig. 5 , Pl. 24: Fig. 5

Dalaca stigmatica Pfitzner (1937: 1296 ; pl. 100b ([ ♀] dorsal)); no data; coll. Seitz; [SMFL] (examined).— Zukowski (1954: 93); as synonym of Dalaca tesselloides Schaus, 1901 .— Nielsen & Robinson (1983: 21).— Robinson & Nielsen (1984: 17).— Nielsen et al. (2000: 844).

Cibyra stigmatica : Mielke & Grehan (2012: 137); lectotype ♀ with the following labels: / stigmatica, Sa Catarina (?) od. Costarica/ Coll. A. Seitz/; SMFL (examined)— Grehan (2012: 4, 5, 23; fig. (valva, intermediate plate, venation)).— Favretto (2016: 72).— Grehan et al. (2023: 77).

Diagnosis. Distinguished from all the previous species by the concave posterior margin of the saccus, narrowly V-shaped, with the corner of the projection nearly right angle (Pl. 15: Fig. 1 ; see arrow). Along with C. barbara sp. nov. and C. mariana sp. nov., C. stigmatica shows all wings more rounded and a lighter brown stripe running over M 2 within the cell and then continuing between Rs4 and M 1 ( Pl. 3 : Figs 1–4 ), instead of dark brown in the two former species ( Pl. 3 : Figs 6–9 , 13–14 ). This contrast facilitates identification.

Examined material (in total 135 ♂ 99 ♀). Brazil. Paraná. Imbaú, 800 m: 1 ♂, 10.III.1995, C. Mielke leg. (CGCM 7.220; CGCM). Tibagi, Guartelá, 1000 m: 1 ♂, 25.II.1997, C. Mielke leg. (CGCM 6.243; CGCM). São José dos Pinhais, Morro do Meio: 1 ♂, 8.I.1970, V.O. Becker & Laroca leg. (CGCM 15.689; CGCM). Tijucas do Sul, Vossoroca, 850 m: 1 ♀, 11.III.1989, C. Mielke leg. (CGCM 23.691; CGCM). Santa Catarina. São Bento do Sul, 800 m: 1 ♀, 14.III.1998, C. Mielke leg. (CGCM 769; CGCM). São Bento do Sul, Rio Natal, 500–700 m: 5 ♂ 1 ♀, 20–21.II.1996, A. Rank leg. (CGCM 4.361, 4.583, 5.333, 5.368, 5.486, 5.578; CGCM); 4 ♂ 1 ♀, 10–29.I.1997, A. Rank leg. (CGCM 4.057, 4.525, 4.570, 4.722, 5.030; CGCM); 1 ♂ 1 ♀, 4–5.II.1997, A. Rank leg. (CGCM 5.504, 5.836; CGCM); 1 ♂, 9.III.1997, A. Rank leg. (CGCM 6.027; CGCM); 3 ♀, 13–23.I.1998, A. Rank leg. (CGCM 6.188, 6.237, 6.522; CGCM); 1 ♂ 1 ♀, 23–25.II.1998, A. Rank leg. (CGCM 4.081, 5.769; CGCM); 1 ♂, 16.I.2001, O. Rank leg. (CGCM 6.021; CGCM); 3 ♂ 3 ♀, I.2001, A. Rank leg. (CGCM 1.800, 1.981, 2.238, 5.766, 6.303, 7.793; CGCM); 1 ♂, 10.II.2001, O. Rank leg. (CGCM 7.449; CGCM); 2 ♀, 25.II.2001, A. Rank leg. (CGCM 6.718, 7.068; CGCM); 1 ♀, 2.III.2001, A. Rank leg. (CGCM 5.693; CGCM); 5 ♀, 5–20.II.2002, A. Rank leg. (CGCM 480, 1.626, 1.816, 2.125, 2.254; CGCM); 1 ♀, 7.II.2003, A. Rank leg. (CGCM 5.062; CGCM); 1 ♂ 1 ♀, I.2004, A. Rank leg. (CGCM 13.744, 13.902; CGCM); 7 ♂ 6 ♀, 9–15.II.2004, O. Rank leg. (CGCM 11.793, 22.557, 23.117, 23.133, 23.149, 23.181, 23.197, 23.231, 23.274, 23.280, 23.355, 23.402, 23.759; CGCM); 2 ♂ 4 ♀, II.2004, A. Rank leg. (CGCM 13.662, 13.817, 13.833, 13.865, 14.896, 16.395; CGCM); 1 ♂ 1 ♀, III.2004, A. Rank leg. (CGCM 13.624, 13.627; CGCM); 1 ♂ 11 ♀, 17–28.I.2005, O. Rank leg. (CGCM 17.639, 17.831, 17.991, 18.007, 18.055, 18.087, 18.119, 18.199, 18.263, 18.295, 18.343, 18.391; CGCM); 3 ♂ 7 ♀, I.2005, A. Rank leg. (CGCM 17.651, 17.879, 17.927, 17.943, 18.039, 18.150, 18.215, 18.279, 18.342, 18.371; CGCM); 1 ♂, 5.II.2005, I. Rank leg. (CGCM 18.427; CGCM); 1 ♂ 3 ♀, 7–15.II.2005, O. Rank leg. (CGCM 17.815, 18.053, 18.359, 23.165; CGCM); 3 ♂ 3 ♀, II.2005, A. Rank leg. (CGCM 17.623, 17.669, 17.863, 18.309, 18.375, 22.412; CGCM); 1 ♀, II.2006, I. Rank leg. (CGCM 19.528; CGCM). São Bento do Sul, Rio Vermelho, 700–900 m: 2 ♀, 9–18.II.1992, I. Rank leg. (CGCM 22.847, 23.835; CGCM); 1 ♀, 29.II.1992, I. Rank leg. (CGCM 5.946; CGCM); 4 ♂, I.1993, I. Rank leg. (CGCM 5.990, 6.115, 7.451, 7.886; CGCM); 1 ♂ 2 ♀, 6–17.II.1993, I. Rank leg. (CGCM 5.977, 6.230, 23.134; CGCM); 1 ♀, 2.III.1993, I. Rank leg. (CGCM 23.770; CGCM); 1 ♂, 9.II.1994, I. Rank leg. (CGCM 7.827; CGCM); 1 ♂, 5.II.1995, I. Rank leg. (CGCM 6.416; CGCM); 1 ♂, 20.XII.1995, I. Rank leg. (CGCM 4.352; CGCM); 1 ♂ 1 ♀, 14–19.I.1997, I. Rank leg. (CGCM 4.427, 5.525; CGCM); 1 ♀, 3.II.1997, I. Rank leg. (CGCM 4.406; CGCM); 1 ♂, 26.II.1997, I. Rank leg. (CGCM 4.127; CGCM); 1 ♂, 21.XII.1997, I. Rank leg. (CGCM 6.964; CGCM); 1 ♀, 25.II.1998, I. Rank leg. (CGCM 5.195; CGCM); 1 m # 3 ♀, 26.I.1999, I. Rank leg. (CGCM 4.101, 5.034, 5.266, 5.457; CGCM); 1 ♂, 26.I.1999, O. Rank leg. (CGCM 7.507; CGCM); 3 ♂ 1 ♀, 9–18.II.1999, I. Rank leg. (CGCM 4.014, 4.978, 5.066, 5.259; CGCM); 1 ♂, 20.III.1999, I. Rank leg. (CGCM 7.135; CGCM); 1 ♂, 28.I.2000, I. Rank leg. (CGCM 6.629; CGCM); 2 ♂ 1 ♀, 6–23.II.2000, I. Rank leg. (CGCM 6.205, 7.198, 7.347; CGCM); 1 ♂, 16.I.2001, O. Rank leg. (CGCM 7.373; CGCM); 5 ♂ 1 ♀, I.2001, I. Rank leg. (CGCM 4.227, 5.000, 5.575, 6.275, 6.429, 7.185; CGCM); 2 ♂, 3.II.2001, O. Rank leg. (CGCM 6.520, 7.616; CGCM); 15 ♂, 6 ♀, II.2001, I. Rank leg. (CGCM 4.041, 4.073, 4.325, 4.433, 4.630, 5.033, 5.038, 5.111, 5.385, 5.672, 5.825, 5.941, 6.220, 6.336, 6.518, 6.717, 7.113, 7.552, 7.966; CGCM); 1 ♂, 21.III.2001, I. Rank leg. (CGCM 7.832; CGCM); 16 ♂ 10 ♀, II.2002, I. Rank leg. (CGCM 4.148, 4.170, 4.211, 4.312, 4.384, 4.451, 4.466, 4.539, 4.607, 4.765, 4.970, 5.086, 5.097, 5.147, 5.253, 5.290, 5.297, 5.348, 5.403, 5.480, 5.498, 5.506, 5.582, 5.924, 6.651, 6.723; CGCM); 1 ♂, 5.III.2002, I. Rank leg. (CGCM 4.997; CGCM); 6 ♂ 2 ♀, I.2003, I. Rank leg. (CGCM 5.075, 5.709, 5.768, 6.048, 6.148, 7.436, 7.668, 7.939; CGCM); 2 ♂, 23.II.2003, I. Rank leg. (CGCM 4.025, 4.914; CGCM); 7 ♂ 1 ♀, 11–27.I.2004, I. Rank leg. (CGCM 13.711, 13.726, 13.727, 13.743, 13.880, 14.096, 14.190, 14.205; CGCM); 1 ♂, 25.II.2004, L. Rank leg. (CGCM 16.564; CGCM); 7 ♂ 2 ♀, II.2004, I. Rank leg. (CGCM 13.647, 13.774, 13.790, 13.806, 13.854, 13.870, 14.177, 14.210, 14.226; CGCM); 2 ♂, 21.IV.2004, I. Rank leg. (CGCM 14.188, 14.367; CGCM); 1 ♂ 3 ♀, 13–20.II.2006, I. Rank leg. (CGCM 19.914, 20.018, 22.444, 22.556; CGCM); 1 ♂, 5.II.2009, O. Rank leg. (CGCM 25.262; CGCM). Urubici, Serra do Panelão, 1250 m: 2 ♂ 1 ♀, 14–16.II.1999, C. Mielke leg. (CGCM 39, 715, 753; CGCM); 1 ♀, 5.III.2000, C. Mielke leg. (CGCM 2.162; CGCM); 1 ♂, 22.II.2004, T. Decaëns leg. (CGCM 22.616; CGCM). Urubici, Morro da Igreja, 1350 m: 5 ♂, 15–18.III.1998, C. Mielke & E. Joerke leg. (CGCM 36.351, 36.421, 36.423, 36.443, 36.448; CGCM).

Male ( Pl. 3 : Figs 1–4 , Pl. 10: Fig. 11 ). Forewing length: 15–20 mm, wingspan: 32–42 mm. Epiphysis present.

Male genitalia (Pl. 15: Fig. 1 , Pl. 19: Fig. 11 ). Saccus with posterior edge concave, slightly V-shaped, with corner of projection at right angle. Tergal lobes extended posteriorly. Pseudotegumen reinforced anteriorly and posteriorly. Fultura inferior as long as wide, bilobed dorsally. Valvae with tip rounded.

Female ( Pl. 3 : Fig. 5 , Pl. 13: Fig. 5 ). Forewing length: 23–35 mm, wingspan: 44–64 mm.

Female genitalia (Pl. 23: Fig. 5 , Pl. 24: Fig. 5 ). Lamella antevaginalis slightly sclerotized, only its latero-posterior dorsal edge densely sclerotised, forming a triangular process; each well separated medially by a shallow bilobed projection, slightly sclerotised and setose, antero-ventrally. Ductus bursae tubular, ca. 2.5× longer than pyriform corpus bursae.

Distribution. Central-southern Paraná to eastern Rio Grande do Sul, southern Brazil at altitudes between about 500 to 1350 m (Pl. 25: Fig. 2 ).

Remarks. This species is relatively common in the northeastern Santa Catarina from mid to late summer. While males have a highly variable FW ornamentation, females do not. The species is sympatric and synchronic with C. monoargenteus and C. ybyra within this species-group.

The original description is an image of the adult female with few details about FW ornamentation. The male and female genitalia are here figured for the first time.

Figures

PLATE 1. FIGURES 1−12. Cibyra spp. of ferruginosa species-group. Adults (dorsal): 1 (CGCM 33.377), 2 (CGCM 35.939), 3 (type no. 18604), 4 (CGCM 10.168), 5 (CGCM 27.547), 6 (CGCM 26.691), 7 (CGCM 23.321), 8 (CGCM 30.335), 9 (CGCM 30.343), 10 (CGCM 23.937), 11 (CGCM 42.000), 12 (CGCM 29.967). Depositories of the specimens: 1–2, 4–12 in CGCM; 3 in USNM.

PLATE 2. FIGURES 1−15. Cibyra spp. of monoargenteus species-group. Adults (dorsal): 1 (CGCM 25.160), 2 (CGCM 22.636), 3 (CGCM 24.860), 4 (CGCM 27.289), 5 (CGCM 36.137), 6 (CGCM 35.529), 7 (CGCM 35.658), 8 (CGCM 49.783), 9 (CGCM 49.833), 10 (CGCM 49.965), 11 (CGCM 45.284), 12 (CGCM 23.315), 13 (CGCM 43.815), 14 (CGCM 42.861), 15 (CGCM 23.483). Depositories of the specimens: 1–6, 13–15 in CGCM; 7, 12 in DZUP; 8–11 in CEIOC.

PLATE 3. FIGURES 1−16. Cibyra spp. of monoargenteus and yungas species-group.Adults (dorsal): 1 (DZ 15.548), 2 (CGCM 26.432), 3 (CGCM 23.181), 4 (CGCM 23.231), 5 (CGCM 480), 6 (CGCM 36.073), 7 (CGCM 7.238), 8 (CGCM 51.990), 9 (CGCM 51.089), 10 (CGCM 50.768), 11 (CGCM 38.984), 12 (CGCM 42.783), 13 (CGCM 39.896), 14 (CGCM 38.574), 15 (3790), 16 (CGCM 42.521). Depositories of the specimens: 1, 6, 13 in DZUP; 2–5, 7, 11–12, 14, 16 in CGCM; 8–10 in CEIOC; 15 in ZSBS.