Rhopyscelis singuil ( Nieto 2004 ) Cruza & Sallesb & Hamada, 2020

Cruz, Paulo Vilela, Salles, Frederico Falcão & Hamada, Neusa, 2020, A cladistic approach for generic delimitation of Paracloeodes Day, Rivudiva Lugo-Ortiz & McCafferty, and Varipes Lugo-Ortiz & McCafferty (Ephemeroptera: Baetidae), Insect Systematics & Evolution 51 (2), pp. 256-275 : 272

Rhopyscelis singuil ( Nieto 2004) comb. n.

Varipes singuil Nieto 2004: 169 ; Domínguez et al. 2006: 188; Castillo & Pérez 2011: 348; Gutiérrez et al. 2013: 295.

Material examined. One nymph on slide (paratype), ARGENTINA , Escaba , State of Tucuman, Rio Singuil, 5.viii.1999, Molineri C. col. One nymph on slide (paratype), ARGENTINA , Salta, Dpto. Guachipas , Rio Grande de El Sauce, 15.ix.1998, Domínguez E., Molineri C. and Ubero cols, deposited at Museo Miguel Lillo – Argentina . Additional material not examined: Holotype (male nymph), Tucuman, ARGENTINA , river Medina , S26°32’27”. W65°01’45”, 860 m. 14.vi. 2001, Moiineri, Manzo, Orce & Nieto cols, deposited at Museo Miguel Lillo - Argentina .

Diagnosis. Male imago. The characters used in the generic section can also be used for specific identification.

Mature nymph. 1) antennae long, 1.5 × length of head capsule; 2) presence of medial decline on distal margin of labrum; 3) maxillae with palp 1.5 × length of galealacinia; 4) lingua with a small rounded apical projection ( Fig. 35 in Nieto 2004); 5) glossa subcircular (Fig. 37 in Nieto 2004); 6) tarsal claws 0.36 × length of tarsi; 7) abdominal terga I and VIII dark brown.

Distribution. Argentina.

Figures

Figs. 31–36. 31, genitalia, black arrows indicate the unistyliger inner projection (Paracloeodes sp.) Chars 142–149; 32, genitalia, black arrow indicates the spine and convex subgenital plate (Paracloeodes atroari) Chars 142–149; 33, genitalia, black arrow indicates the rounded apex of subgenital plate (Callibaetis sp.) Chars 142–149; 34, genitalia, black arrow indicates the concave subgenital plate (Paracloeodes sp.) Chars 142–149; 35, genitalia, black arrow indicates the rounded apex of subgenital plate (Callibaetis capixaba) Chars 142–149; 36, genitalia, black arrow indicates the triangular subgenital plate (Apobaetis fiuzai) Chars 142–149, adapted from Cruz et al. 2011.