Anacroneuria atrifrons Klapálek, 1922

(Fig. 1A, 2 A–B)

Anacroneuria atrifrons Klapálek, 1922: 89; Illies 1966: 313; Stark & Sivec 1998: 41; Froehlich 2008: 129; Righi-Cavallaro & Lecci 2010: 36; Stark et al. 2012: 79; Stark 2013: 96; Ribeiro & Gorayeb 2016: 434; Menezes et al. 2020: 465.

Distribution. BRAZIL: States of Amazonas, Bahia, Espírito Santo, Mato Grosso do Sul and Roraima. New record: State of Maranhão.

Material examined. BR,MA: Caxias municipality, Pé da Serra, Itapecuru River, 05°07’28.51”S, 43°33’02.26”W, 60 m, 20/VII/2017, Nascimento, SRS col., 4 males .

Morphometric data. Male (n=4) forewing length: 9 mm.

Remarks. Adults were collected from the margin of Rio Itapecuru, a large river flowing through a landscape highly impacted by agriculture and grazing. The substrate of this river was composed of sand with accumulated leaf litter and plant material in some areas, and rocks in some reaches. The above record adds to previous reports of this taxon being primarily associated with large rivers, such as the Rio Cricaré (Espírito Santo) (Gonçalves et al. 2017) and the Rio Indaiá Grande (Mato Grosso do Sul) (Righi-Cavallaro & Lecci 2010). In addition, this species can occur over a wide range of environments, having been recorded from the Atlantic Forest of the State of Espírito Santo (Gonçalves et al. 2017); in the Cerrado (savanna) in the states of Bahia (Stark 2013), Maranhão and Mato Grosso do Sul (Righi-Cavallaro & Lecci 2010); and in the Amazon Rainforest in the states of Amazonas (Klapálek 1922; Froehlich 2008) and Roraima (Menezes et al. 2020) (Fig. 1A).