Anacroneuria debilis ( Pictet, 1841 )

Gastaldo, Rodrigo Braga, Salles, Frederico Falcão & Almeida, Lucas Henrique De, 2025, Taxonomic notes on Anacroneuria Klapálek, 1909 (Plecoptera: Perlidae) types of the Museum of Natural History of Berlin - Museum für Naturkunde des Humboldt-Universität zu Berlin, Germany, Zootaxa 5659 (3), pp. 444-448 : 446

Anacroneuria debilis ( Pictet, 1841)

Figure 2A–F

Perla (Perla) debilis Pictet, 1841: 255

Anacroneuria brevicollis Klapálek, 1922

Anacroneuria brevicollis Klapálek, 1922 in Illies, 1966: 314.

Perla debilis Pictet, 1841 in Illies, 1966: 501.

Anacroneuria debilis ( Pictet, 1841) in Zwick, 1972: 1155.

Anacroneuria debilis ( Pictet, 1841) in Zwick, 1973: 270.

Anacroneuria brevicollis Klapálek, 1922 (synonym of Perla (Perla) debilis Pictet, 1841 ) in Zwick, 1973: 486.

Anacroneuria debilis ( Pictet, 1841) in Froehlich, 2010: 154 .

This species has an overwhelming abundance of records and collected specimens ( Gonçalves et al., 2017; Romero, 2017; Rippel et al., 2019; Almeida & Bispo, 2020; De Carvalho et al., 2021; Deprá et al., 2023). Pictet (1841) described the species based on a male, whose penial armature was illustrated by Zwick (1972). Subtle differences are found between populations of A. debilis in Brazil ( Novaes & Bispo, 2014; De Carvalho et al., 2021), and as multiple authors have repeatedly stated, a comprehensive review of this species is necessary. While the holotype is in precarious condition, the penial armature has been dissected and is still intact ( Fig. 1 ). A range-wide review of A. debilis is out of the scope of these notes.

Figures

FIGURE 1. Lectotype of Anacroneuria annulicauda (Pictet, 1841) (A–C) and holotype of Anacroneuria longicauda (Pictet, 1841) (D–F).A: general state of specimen; B: subgenital plate; C: labels that accompany specimen; D: general state of specimen; E: subgenital plate; F: labels that accompany specimen.

FIGURE 2. Holotype of Anacroneuria debilis (Pictet, 1841). A: general state of specimen; B: dissected genitalia; C: labels that accompany specimen; D: penial armature in dorsal view; E: penial armature in ventral view; F: penial armature in lateral view.