Cloeodes ioachimi Salles, Massariol & Angeli

Salles, F. F., Massariol, F. C., Angeli, K. B., Lima, M. M., Gattolliat, L. & Sartori, M., 2015, Revealing the diversity of Cloeodes Traver, 1938 (Ephemeroptera: Baetidae) in the Neotropics: description of eleven new species from Brazilian mountain ranges, Zootaxa 4020 (1), pp. 1-50 : 25

Cloeodes ioachimi Salles, Massariol & Angeli , sp. nov.

Figures 2 b, 17, 18, 30.

Diagnoses. NYMPH. A) Body color pattern with inconspicuous marks on abdominal terga ( Fig. 2 b); B) Labrum, medially, with single long seta ( Fig. 17 a); C) Maxillary palp as long as length of galea-lacinia ( Fig. 17 d); D) Inner margin of labial palp segment III distinctly shorter than outer margin ( Fig. 17 e); E) Distal projection of fore femur long (distinctly exceeding apex of femur, Figs. 18 a, 18b); F) Gills without medial rib ( Fig. 18 e).

Nymph (nearly mature). Lengths. Body: 5.8 mm; cerci: 1.9 mm; terminal filament: 1.9 mm; antenna: 2.2 mm.

Coloration ( Fig. 2 b). General coloration yellowish brown. Head yellowish-white, slightly washed with brown except on frons. Legs yellowish-white washed with gray on apex of femur, base of tibia and tarsus. Terga. Segments III, V and VI with central blackish irregular mark. Sterna yellowish-white. Filaments yellowish-white with a brownish apical band.

Head. Labrum ( Fig. 17 a). Length about 0.7 × maximum width; dorsal arc with single medial seta; ventrally with 8–13 spine-like setae near lateral margin.

Mandibles ( Figs. 17 b, 17c). Denticles of mola constricted at base (as in fig. 6f).

Maxilla ( Fig. 17 d). Medially with 1 spine-like seta + 6 apically pointed setae. Maxillary palp reaching apex of galea-lacinia; palp segment II 1.2 × length of segment I.

Labium ( Fig. 17 e). Base of glossa expanded (reaching at least half of paraglossa); inner and outer margin respectively with around 20 and 12 spine-like setae increasing in length apically; ventral surface scattered with few short setae at base. Paraglossa dorsally with arc of 3 setae close to inner margin; ventrally with arc of 8–10 setae close to inner margin; segment II dorsally with oblique row of 6–8 setae; segment III with distal margin slightly truncate; inner margin distinctly shorter than outer margin; ventrally covered with around 45 long setae ( Fig. 17 e); setae on inner margin serrate.

Thorax. Hind wing pad. Present.

Fore leg ( Fig. 18 a). Ratio 1.6:1(0.8mm):1:0.2. Femur. Length about 4.8 × maximum width; outer margin with row of 11–12 clavate setae (length of setae about 0.2 × maximum width of femur); submarginal setae absent; anterior surface and inner margin with around 30 spine-like setae; posterior surface with around 15 scattered setae near inner margin; distal projection exceeding apex of femur ( Fig. 18 b), 0.2 × width of femur, apically with 2 clavate setae. Tibia. Outer margin with few simple setae; inner margin with two serrate setae on apex; subtending bristle blunt, clavate, extending apex of tibia ( Fig. 18 c). Tarsus. Inner margin with row of 14+1 spine-like setae. Tarsal claw. 0.3 × length of tarsus.

Mid and hind legs. Similar to fore leg, except for the lower number of setae on anterior surface of femur, subapical projections of femur less developed and type of setae on inner apex of tibia (simple instead of serrate).

Abdomen. Terga ( Fig. 18 d). With spines present on posterior margin of segments II–X; larger spines on posterior margin 3.8 × longer than wide.

Sterna . With spines present on posterior margin of segments: IV–IX (segment III with scarce spines).

Gills ( Fig. 18 e). Outer margin serrated on distal 1/4; inner margin slightly serrated; medial rib absent; tracheae extending from main trunk to inner and outer margins. Gill I about 3/4 length of segment II, oval. Gill IV reaching apex of segment VI, asymmetric, broad at middle. Gill VII as long as length of segments VIII to IX.

Paraproct ( Fig. 18 f). With 12–14 spines.

Cercus . With large spines on every two-segments.

Terminal filament. Without large spines.

Male and female imago. Unknown.

Etymology. After Joaquim de Lima Salles, beloved son of Frederico Salles and Marcela Lima.

Distribution ( Fig. 30 ). Southeastern Brazil, Minas Gerais State, Serra do Trovão (part of Serra do Espinhaço).

Type-material. HOLOTYPE. Nymph (on two slides, one with mouth parts, legs and gills, one with abdomen), BRAZIL, Minas Gerais, Ouro Preto, Lavras Novas, S 20°28'55.13" W 43°31'27.58", 1276 m.a.s.l., 18/viii/2012, Salles FF, col. (CZNC). PARATYPES. 11 nymphs (two on slides), same data as holotype (6 CZNC, 3 MZL, 2 IBN).

Figures

FIGURE 2. Habitus, nymphs, dorsal view. a. Cloeodes guara. b. Cloeodes ioachimi. c. Cloeodes lucifer. d. Cloeodes magnus.

FIGURE 17. Cloeodes ioachimi, nymph. a. Labrum (d. v.). b. Right mandible (d. v.). c. Left mandible (d. v.). d. Maxilla (v. v.). e. Labium (v. v.).

FIGURE 18. Cloeodes ioachimi, nymph. a. Fore leg, anterior surface. b. Fore femur, apex projection. c. Apex of fore tibia. d. Posterior margin of segment IV. e. Gill IV. f. Paraproct (v. v.).

FIGURE 30. Political map of South America (showing Brazilian states) with details of the distribution of the new species of Cloeodes according to the altitude (white, from 0 to 400 m. a. s. l.; light gray from 400 to 800 m. a. s. l.; dark gray from 800 to 1200 m. a. s. l.; and black, above 1200 m. a. s. l.).