Paracloeodes pacawara, Nieto, Carolina & Salles, Frederico Falcaõ, 2006

Nieto, Carolina & Salles, Frederico Falcaõ, 2006, Revision of the Genus Paracloeodes (Ephemeroptera: Baetidae) in South America, Zootaxa 1303, pp. 1-33 : 11-12

Paracloeodes pacawara sp. n. ( Figs. 50–62 )

Nymph ( Fig. 50 ). Length: body, 3.0– 3.4 mm; cerci, 1.2–1.3 mm; terminal filament, 1.1–1.2 mm. Antennae, 1.0– 1.1 mm; 1.5–1.8 times the head capsule. Head yellowish with small dark spots, ocelli dark brown. Turbinate portion of compound eyes in male nymphs yellowish­brown. Frontal keel present. Antennae pale yellow. Mouthparts: labrum ( Fig. 51 a), dorsally without a pair of subapical setae near middle. Mandibles ( Figs. 52–53 ): external margins straight. Left mandible ( Fig. 52 ) with prostheca with 2–3 denticles. Hypopharynx with lingua ( Fig. 54 ) subequal to superlingua and rounded apically. Maxillae ( Fig. 55 ) with palpi 1.5 times the length of galea­lacinia. Labium ( Figs. 56 a–b) with segment II of palpi with a strong rounded distomedial projection, 3.1 times width of segment III, segment III conical.

Thorax ( Fig. 50 ): pro­, meso­ and metanota yellowish­brown with small brownish spots distributed throughout, and with a narrow pale yellow median band. Pleura yellowish­brown, sterna pale yellow. Legs ( Fig. 57 ) pale yellow, with tarsal claws 0.5 times the length of tarsi and with two rows of minute denticles basally ( Fig. 58 ). Hind wing pads absent.

Abdomen: segments II–III and IX brownish, remaining segments yellowish­brown, all segments with small brownish spots as in Fig. 50 . Posterior margin of terga with spines as long as wide ( Fig. 59 ). Sterna pale yellow, anterior margin of each segment and entire sterna IX–X brownish. Gills whitish ( Fig. 60 ). Paraprocts with 9–10 spines ( Fig. 61 ). Caudal filaments yellowish with crown of spines on each segment ( Fig. 62 ).

Etymology. Pacawara is the name of a tribe that inhabit the north of Bolivia, where this species was collected.

Discussion. This species can be distinguished from the other species of the genus by the following combination of characters, 1) frontal keel present; 2) antennae 1.5–1.8 times the head capsule; 3) labrum without a pair of subapical setae near middle ( Fig. 51 a); 4) lingua ( Fig. 54 ) subequal to superlingua and rounded apically; 5) maxillary palpi 1.5 times the length of galea­lacinia ( Fig. 55 ); 6) segment II of labial palpi with strong rounded distomedial projection 3.1 times width of segment III ( Fig. 56 b); 7) hind wing pads absent; 8) tarsal claws long, 0.5 times the length of tarsi ( Fig. 57 ) and with two rows of minute denticles basally ( Fig. 58 ); 9) posterior margin of abdominal terga with spines as long as wide ( Fig. 59 ); 10) caudal filaments with crown of spines on each segment ( Fig. 62 ); 11) body color pattern with small dark spots throughout ( Fig. 50 ).

Material. Holotype male nymph: BOLIVIA, Depto. Beni, Prov. Ballivian, Río San Bernardo, S 14°45´16´´, W 67°10´07´´, 220 m, 22/ V/ 2002, Domínguez col. Paratypes: 44 nymphs same data and collector. The holotype and 5 paratypes are deposited at UMSA. Five paratypes deposited at IBRJ, other paratypes housed at IFML.

Figures

FIGURE 50 – 62. Paracloeodes pacawara sp. n. Nymph. 50, General view. Mouthparts (Figs. 51 – 56): 51 a, labrum, left d. v., right v. v.; 51 b, labrum: apical setae; 52, left mandible v. v.; 53, right mandible v. v.; 54, hypopharynx v. v.; 55, maxilla v. v.; 56 a, labium, left d. v., right v. v.; 56 b, palp: segments II – III. 57, leg I; 58, tarsal claw I. 59, posterior margin of tergum IV. 60, gill IV. 61, paraproct. 62, detail of cercus.