Anacroneuria debilis (Pictet, 1841)

(Figs. 4A–P)

Perla (Perla) debilis Pictet, 1841: 255 .

Anacroneuria debilis Zwick, 1972: 1155; Zwick, 1973: 486; Froehlich, 2002: 76; Avelino Capistrano et al., 2011: 59–63; Baldin et al., 2013: 392; Bispo et al., 2014: 592; Novaes & Bispo, 2014a: 434; Novaes & Bispo, 2014b: 459; Novaes et al., 2016: 95; Duarte & Lecci, 2016: 293; Almeida & Duarte, 2017: 481; Gonçalves et al., 2017: 146; Rippel et al., 2019: 359.

Material examined. BR, GO. Parque Nacional das Emas, Chapadão do Céu, Luz, sede, prox. ao Rio Formoso, 18°15'40.7"S 52°53'18.5"W, 28.iii - 06.iv.1984 , SAV, DA, 2 males (CLBA). Pirenópolis, Rio das Almas, 14.xi.1993, LGO, 1 male (CLBA); Córrego Inferno, 02.ii.1994, PCB & LGO, 1 male (CLBA); Córrego inferno, 09.iv.1994, PCB & LGO, 3 males (CLBA); 29.x.1994, MVLV, 1 male (CLBA). Chapada dos Veadeiros, Alto Paraíso de Goiás, Ribeirão Raizama, 14°10'51.7"S 47°49'18.5"W, 10.xii.2006, PCB, 1 male (CLBA); Ribeirão Couro, Cachoeira São Bento, 13.xii.2006, PCB, 6 males (CLBA); Loquinhas, 14°08'33.1"S 47°29'23.3"W, 15.xii.2006, PCB, 1 male (CLBA); Vale da Lua, 14°11'11.5"S 47°47'21.1"W, 17.xii.2006, PCB, 2 males (CLBA) .

Morphometric data. Male (n=18), anterior wing length: 8 mm – 13 mm.

Remarks. Anacroneuria debilis was originally described by Pictet (1841) and the penial armature was illustrated by Zwick (1972). In Central Brazil, the species was recorded in the region of the Cidade de Goiás (Bispo et al. 2014), and in the present study we expanded the records for the Serra dos Pireneus, Chapada dos Veadeiros, and Emas National Park, Goiás state. Recent studies revealed that this species has a large distribution and high morphological variation (Bispo et al. 2014; Novaes & Bispo 2014c; Almeida & Duarte 2017). We also found a large variation in the penial armatures of the males of A. debilis, especially in the keel and apex (Fig. 4). As indicated by previous studies (Novaes & Bispo 2014c; Almeida & Duarte 2017) and our results, A. debilis may be composed of a group of cryptic species. Therefore, a more integrative study based on both morphological and molecular data is required for a better definition of this species.