Cloeodes melanotarsus 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 : 34

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Cloeodes melanotarsus Salles, Massariol & Angeli

sp. nov.

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

Figures 3 View FIGURE 3 a, 3 b, 23, 24, 30.

Diagnoses. NYMPH. A) Small body size (c.a. 5.0 mm); B) Body color pattern with distinct darker marks on abdominal terga ( Fig. 3 View FIGURE 3 a); C) Labrum, medially, with single long seta ( Fig. 23 View FIGURE 23 a); D) Maxillary palp short (¾ length of galea-lacinia) ( Fig. 23 View FIGURE 23 d); E) Inner margin of labial palp segment III subequal to outer margin ( Fig. 23 View FIGURE 23 e); F) Distal projection of fore femur short (not exceeding apex of femur, Figs. 24 View FIGURE 24 a, 24 b); G) Gills without medial rib and poorly tracheated ( Fig. 24 View FIGURE 24 e); H) Tarsi blackish ( Fig. 3 View FIGURE 3 b).

Nymph. Lengths. Body: 4.4–5.2 mm; cerci: 1.6–2.1 mm; terminal filament: 1.6–2.1 mm; antenna: 1.3–1.5 mm.

Coloration ( Figs. 3 View FIGURE 3 a, 3 b). General coloration yellowish-white. Head yellowish-white, dark brown stripe below lateral ocellus. Legs yellowish-brown, except apex of femur, base of tibia and tarsus washed with black ( Fig. 3 View FIGURE 3 b). Terga. Segments I–IV with submedial brown mark; segments V and VI almost completely washed with brown; segment X partially washed with brown. Sterna yellowish-white. Filaments yellowish-white with subapical dark brown band.

Head. Labrum ( Fig. 23 View FIGURE 23 a). Length about 0.7 × maximum width; dorsal arc with single medial seta; ventrally with 6–8 spine-like setae near lateral margin.

Mandibles ( Figs. 23 View FIGURE 23 b, 23 c). Denticles of mola constricted at base (as in fig. 6 f).

Maxilla ( Fig. 23 View FIGURE 23 d). Medially with 1 spine-like seta + 6 apically pointed setae. Maxillary palp not reaching apex of galea-lacinia; palp segment II equal to length of segment I.

Labium ( Fig. 23 View FIGURE 23 e). Base of glossa expanded (reaching at least half of paraglossa); inner and outer margin respectively with around 15 and 12 spine-like setae increasing in length apically; ventral surface scattered with few short setae at base. Paraglossa dorsally with arc of 2 setae close to inner margin; ventrally with arc of 7 setae close to inner margin. Labial palp with segment I 0.8 × length of segments II and III combined; segment II dorsally with oblique row of 6 setae; segment III with distal margin slightly truncate; inner margin subequal to outer margin; ventrally covered with around 20 long setae ( Fig. 23 View FIGURE 23 e); setae on inner margin simple.

Thorax. Hind wing pad. Present.

Fore leg ( Fig. 24 View FIGURE 24 a). Ratio 2: 1 (0.5mm): 1.2: 0.4. Femur. Length about 4.6 × maximum width; outer margin with row of 9–10 blunt, clavate setae (length of setae about 0.2 × maximum width of femur); submarginal setae absent; anterior surface and inner margin with around 25 spine-like setae; posterior surface bare; distal projection distinct, but not exceeding apex of femur ( Fig. 24 View FIGURE 24 b), apically with 2 clavate setae. Tibia. Outer margin with few simple setae; inner margin with two serrate setae on apex; subtending bristle clavate, extending apex of tibia ( Fig. 24 View FIGURE 24 c). Tarsus. Inner margin with row of 12 + 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.

Abdomen. Terga ( Fig. 24 View FIGURE 24 d). With spines present on posterior margin of segments I–X; larger spines on posterior margin 4.3 × longer than wide.

Sterna . With spines present on posterior margin of segments IV–IX.

Gills ( Fig. 24 View FIGURE 24 e). Outer margin serrated on distal 1 / 4; inner margin slightly serrated; medial rib absent; few secondary tracheae extending from main trunk to inner and outer margins. Gill I about 3 / 4 length of segment II, oval. Gill IV as long as length of segments V to VI combined, asymmetric, broad at base. Gill VII reaching 1 / 2 of segment IX.

Paraproct ( Fig. 24 View FIGURE 24 f). With 7–8 spines.

Cercus . With large spines on every two-segments.

Terminal filament. With spines on every four segments.

Male and female imago. Unknown.

Etymology. An allusion to the blackish tarsi of the species.

Distribution ( Fig. 30 View FIGURE 30 ). Southeastern Brazil, Minas Gerais State, Serra do Intendente (part of Serra do Espinhaço), Parque Estadual da Serra do Intendente.

Type-material. HOLOTYPE. Nymph (on a single slide), BRAZIL, Minas Gerais, Conceição do Mato Dentro, Serra do Intendente, Rio Peixe Tolo, S 19 °0’ 14.40 ” W 43 ° 36 ’45.00”, 700 m. a.s.l., 08–09/ix/ 2012, Salles FF, col. ( CZNC). PARATYPES. 22 nymphs (two on slides), same data as holotype (10 CZNC, 7 UFRJ, 5 MZL).


Musee Zoologique