Revision of the Genus Paracloeodes (Ephemeroptera: Baetidae) in South America Author Nieto, Carolina Author Salles, Frederico Falcaõ text Zootaxa 2006 1303 1 33 journal article 10.5281/zenodo.173668 8ce269f9-2380-43d9-b3ca-b8d799e9dd65 1175­5326 173668 Paracloeodes eurybranchus Lugo­Ortiz & McCafferty ( Figs. 28–39 ) P. eurybranchus Lugo­Ortiz & McCafferty, 1996 : 166 . Nymph and female imago. Characterized by Lugo­Ortiz & McCafferty (1996) with the following necessary changes: tarsal claws with two rows of denticles, small basally and 6–7 larger denticles distally ( Fig. 35 ). Caudal filaments with crown of spines on each segment, cerci with long spines toward the external margin every two segments ( Fig. 39 ). Discussion. Paracloeodes eurybranchus can be distinguished from the other species of the genus by the following combination of characters. In the nymphs, 1) frontal keel present; 2) antennae 2–2.5 times width of head capsule; 3) labrum with a pair of subapical setae near middle ( Fig. 28 a); 4) hypopharynx: lingua shorter than superlingua and scarcely projected apically ( Fig. 31 ); 5) mandibles with external margins straight ( Figs. 29–30 ); 6) maxillary palpi 1.2–1.4 times the length of galea­lacinia ( Fig. 32 ); 7) segment II of labial palpi with rounded distomedial projection, 1.8 times width of segment III ( Fig. 33 ); 8) hind wing pads present; 9) tarsal claws 0.45 times length of tarsi ( Fig. 34 ), with two rows of denticles, small basally and 6–7 larger denticles distally ( Fig. 35 ); 10) posterior margin of abdominal terga with spines 2.5 times longer than wide ( Fig. 36 ); 11) gills with trachea pigmented ( Fig. 37 ); 12) paraprocts with 16–18 spines apically ( Fig. 38 ); 13) caudal filaments with crown of spines on each segment, cerci with long spines toward the external margin every two segments ( Fig. 39 ). Material. Twenty nymphs: ARGENTINA , Córdoba, Río Nono, 5 km de Mina Clavero, S 31º48'16'', W65º00'14'' , 840 m , 14–15/ XI/ 2001 , Nieto & Orce colls. Fifteen nymphs are housed at IFML , other nymphs deposited at IBRJ .