Cloeodes penai (Morihara & Edmunds)

Nieto, Carolina & Richard, Barton, 2008, The genus Cloeodes (Ephemeroptera: Baetidae) in Argentina with new generic synonymy and new species, Zootaxa 1727, pp. 1-21 : 13-15

Cloeodes penai (Morihara & Edmunds)

(Figs. 52–67)

Notobaetis penai Morihara & Edmunds, 1980: 606 .

Cloeodes penai Waltz & McCafferty, 1987a: 179 .

Cloeodes (Notobaetis) penai, Waltz & McCafferty, 1987b: 196

Diagnosis. Cloeodes penai can be distinguished from the other species of the genus by the following combination of characters. In the adult, 1) hind wings small, 0.1 times the length of fore wings (Figs. 52, 53a), costal projection located in the center of anterior margin (Fig. 53b); 2) genitalia (Fig. 54) bases of forceps close together, segment III rounded. In the nymphs, 1) antennae with scape subequal in length to pedicel ( Fig. 55 ); 2) labrum ( Fig. 56 ) with one subapical seta centrally and two setae near lateral margin, anterior margin with basally bifid setae near midline and apically bifid setae near lateral margin; 3) left mandible without setae between prostheca and mola, thumb of molar area transverse to anterior margin ( Fig. 57 ); 4) right mandible with prostheca bifid ( Fig. 58 ); 5) lingua with a rounded projection ( Fig. 59 ); 6) maxillary palpi subequal to galea-lacinia ( Fig. 60 ); 7) labial palpi with segment III rounded ( Fig. 61 ); 8) hind wing pads present, though very small; 9) dorsal edge of femora with a row of pointed spines, and apically rounded ( Fig. 63 ), femora, tibiae and tarsi with bipectinate spines ( Figs. 62, 64 ); 10) tarsal claws without denticles ( Fig. 64 ); 11) posterior margin of abdominal terga with spines ( Fig. 65 ); 12) gills elongate, broadly acute posteriorly, sometimes rounded ( Fig. 66 ); 13) posterior margin of paraprocts with spines ( Fig. 67 ); 14) caudal filaments with simple setae, and with whorl of spines on each segment (as in Fig. 42 ).

Distribution. Argentina: Córdoba and Tucumán.

Material examined. Paratypes: 2 nymphs: ARGENTINA, Córdoba prov, Copina (ca. 25 km WNW Alta Gracia) elev. 1650 m, 11–14/ IV/ 1967, L. Peña. ( FSCA E1010T); 1 male imago (reared): Tucumán prov, La Cascada, La Sala, 7/ XI/ 1981, Domínguez col.; 8 nymphs: Tucumán, San Javier, Arroyo Los Noques, 3/ VIII/ 1978, Bertikian col. Paratypes housed in FAMU, other material in IFML.

Cloeodes stelzneri (Weyenbergh) Nomen dubium

Cloë stelzneri Weyenbergh, 1883: 170 .

Baetis stelzneri ; Eaton, 1885: 171.

Cloeodes stelzneri ; Lugo-Ortiz & McCafferty, 1999: 259.

Discussion. This species was originally described by Weyenbergh (1883) from adults from Santa Fe and was placed in Cloë . Eaton (1885) transferred this species to the genus Baetis , but he worked with material from Córdoba, Argentina (see Eaton, 1885: 171). Later, Lugo-Ortiz & McCafferty (1999) concluded, based on size, distribution, and possession of a small lancetlike costal process on the hind wings, that this species belonged to Cloeodes . They also suggested a possible synonymy between this species and Cloeodes penai based on similarity of the hind wings. However, this single characteristic is not sufficient for the synonymy of the two species. Moreover, the type material is apparently lost ( Lugo-Ortiz & McCafferty, 1999) so it will be impossible to assign fresh material to this species. For these reasons, Cloeodes stelzneri is proposed here as a nomen dubium.

Distribution. Argentina: Santa Fe and Córdoba.

Figures

FIGURES 55 – 67. Cloeodes penai. Nymph. 55, antennae. Mouthparts (Figs. 56 – 61): 56, labrum, left d. v., right v. v.; 57, left mandible v. v.; 58, right mandible v. v.; 59, hypopharynx v. v.; 60, maxilla v. v.; 61, labium, left d. v., right v. v. 62, leg I; 63, femur I apical margin; 64, tarsal claw I. 65, posterior margin of tergum IV. 66, gill IV. 67, paraproct.

FIGURES 31 – 42. Cloeodes incus n. comb. Nymph. Mouthparts (Figs. 31 – 36): 31, labrum d. v., left d. v., right v. v.; 32, left mandible v. v.; 33, right mandible v. v.; 34, hypopharynx v. v.; 35, maxilla v. v.; 36, labium, left d. v., right v. v. 37, leg I; 38, tarsal claw I. 39, posterior margin of tergum IV. 40, gill IV. 41, paraproct. 42, terminal filament, left cercus, right caudal filament.