Cloeodes espinillo, Nieto, Carolina & Richard, Barton, 2008

Nieto, Carolina & Richard, Barton, 2008, The genus Cloeodes (Ephemeroptera: Baetidae) in Argentina with new generic synonymy and new species, Zootaxa 1727, pp. 1-21 : 8-11

Cloeodes espinillo n. sp.

( Figs. 15–30 )

Male imago ( Fig. 15 ). Length: body, 6.4–6.5 mm. Fore wings, 5.9–6.0; hind wings 1.1–1.2 mm. Head yellowish brown, compound eyes pale yellow, height of stalk half length of eye diameter. Antennae pale yellow. Thorax yellowish brown, sterna yellowish brown. Legs pale yellow. Leg I: tibia 1.5 times the length of femur, tarsi as long as tibia with 4 segments decreasing in length apically. Fore wings ( Fig. 16 ) hyaline, except costal and subcostal spaces translucent. Hind wings ( Figs. 17 a and b) present, 0.2 times the length of fore wing; costal projection pointed and located in the basal third of anterior margin. Posterior margin of the metanotum strongly projected dorsoventrally ( Fig. 18 ). Abdomen pale yellow. Genitalia ( Fig. 19 ) with bases of forceps close together, segment III rounded. Cerci pale yellow.

Female imago. Length: body, 6.6–6.7 mm. Fore wings, 7.2 mm; hind wings, 1.2 mm. Similar to male imago except thorax yellow. Abdomen yellow with tracheae pigmented.

Nymph ( Fig. 20 ). Length: body, 5.5–6.0 mm; cerci, 2.8–3.0 mm; terminal filament, 2.5 mm. Head yellowish brown, longer than wide; compound eyes of the male yellowish brown. Antennae pale yellow, 3 times the head capsule; pedicel 1.5 times the length of scape. Mouthpart: labrum ( Fig. 21 ) 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. Left mandible ( Fig. 22 ) without setae between prostheca and mola, thumb of molar area transverse to anterior margin. Right mandible without setae between prostheca and mola (similar to Fig. 58 ). Hypopharynx ( Fig. 23 ): lingua with a rounded projection. Maxillae (similar to Fig. 60 ), palpi as long as galea-lacinia, two segmented, segment II with a constriction. Labium ( Fig. 24 ) with segment III of palpi rounded.

Thorax yellowish brown ( Fig. 20 ). Fore wing pads pale yellow. Sterna pale yellow. Legs ( Fig. 25 ) yellow. Dorsal edge of femora with a row of pointed spines, apically with a subquadrangular projection with a pair of blunt spines ( Fig. 26 ). Tarsi with a row of short spines. Tarsal claws 0.4 times the length of tarsi. Hind wing pads present.

Abdomen yellowish brown, segments II–III and VI with brown spots as in Fig. 20 , segment IX–X brown, posterior margin of terga with spines ( Fig. 27 ). Sterna pale yellow, segments II–VI with a small tuft of long fine setae laterally on each side ( Fig. 28 ). Paraprocts with spines apically (similar to Fig. 51 ). Gills translucent white, 2 times the length of each tergum, main trachea pigmented ( Fig. 29 ). Caudal filaments yellow, apical third yellowish brown, with flattened setae basally sclerotized ( Fig. 30 ). Cerci ( Fig. 30 ) with long spines toward external margin every two segments, terminal filament with long spines toward midline dorsally and Etymology. Espinillo is the name of one of the rivers where this species was collected.

Diagnosis. Cloeodes espinillo n. sp. can be distinguished from the other species of the genus by the following combination of characters. In the male imago, 1) hind wings 0.2 times the length of the fore wings ( Figs. 16, 17 a); 2) hind wings ( Fig. 17 b) with costal projection located in the first third of the anterior margin; 3) genitalia ( Fig. 19 ) with bases of forceps close together, segment III rounded. In the nymph, 1) hind wing pads present; 2) lingua with a rounded projection ( Fig. 23 ); 3) dorsal edge of femora with a row of pointed spines, apically with a subquadrangular projection with a pair of blunt spines ( Fig. 26 ); 4) abdominal color pattern yellowish brown with segments II–III and VI with brown spots as in Fig. 20 , segments IX–X brown; 5) caudal filaments with flattened setae basally sclerotized ( Fig. 30 ), cerci with long spines toward external margin every two segments and terminal filament with long spines toward midline dorsally and ventrally every two segments (similar to Fig. 14 ).

Material. Holotype: male nymph: ARGENTINA, Córdoba, Río Los Espinillos, 13–16/ IX/ 1997, Nieto & Molineri colls. Paratypes: 4 nymphs, 5 male imagos (reared) and 16 male imagos, same data as holotype. 18 nymphs: Depto. Pocho, arroyito afluente Río Pocho, S 31°13'17'', W 65°08'26'', 1030 m, 14/ XI/ 2001, Orce & Nieto colls. Material housed in IFML.

Figures

FIGURES 15 – 19. Cloeodes espinillo n. sp. Male imago: 15, head and thorax, dorsal; 16, fore wing; 17 a, hind wing;

FIGURES 20 – 30. Cloeodes espinillo n. sp. Nymph. 20, general view. Mouthparts (Figs. 21 – 24): 21, labrum, left d. v., right v. v.; 22, left mandible v. v.; 23, hypopharynx v. v.; 24, labium, left d. v., right v. v. 25, leg I; 26, dorsal margin of femur I. 27, posterior margin of tergum IV; 28, sternum IV. 29, gill IV. 30, cercus.

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 43 – 51. Cloeodes opacus n. sp. Nymph. 43, general view, dorsal. Mouthparts (Figs. 44 – 46): 44, labrum, left d. v., right v. v.; 45, labrum: anterior margin; 46, labium, left d. v., right v. v. 47, leg I; 48, dorsal margin of femur I. 49, posterior margin of tergum IV. 50, gill IV. 51, paraproct. Figs. 52 – 54. Cloeodes penai. Male imago: 52, fore wing; 53 a, hind wing; 53 b, hind wing detail; 54, genitalia v. v.

FIGURES 5 – 14. Cloeodes barituensis n. sp. Nymph. 5, general view, dorsal. 6, antennae. Mouthparts (Figs. 7 – 10): 7, labrum, left d. v., right v. v.; 8, right mandible v. v.; 9, hypopharynx v. v.; 10, maxilla v. v. 11, leg I. 12, posterior margin of tergum IV. 13, gill IV. 14, terminal filament, left cercus, right caudal filament.