Paracloeodes assu, 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 : 7-8

publication ID

https://doi.org/ 10.5281/zenodo.173668

DOI

https://doi.org/10.5281/zenodo.5659782

persistent identifier

https://treatment.plazi.org/id/D1551547-966F-7B0E-FE90-A9C8FAAC8EEB

treatment provided by

Plazi

scientific name

Paracloeodes assu
status

sp. nov.

Paracloeodes assu View in CoL sp. n. ( Figs. 1–11 View FIGURE 1 – 11 )

Mature nymph. Length: body, 6.6–6.8 mm; cerci and terminal filament broken. Antennae, 3.5 mm, more than 3 times the head capsule. Head yellowish­brown. Frontal keel absent, ocelli dark brown. Antennae yellowish­brown. Mouthparts: labrum ( Fig. 1 View FIGURE 1 – 11 a), dorsally with a pair of subapical setae near middle, apical margin with two kinds of setae: basally bifid setae near the midline and simple and bipectinate setae near lateral margin ( Fig. 1 View FIGURE 1 – 11 b). Mandibles ( Figs. 2 View FIGURE 1 – 11 a­3): external margins straight. Prostheca of left mandible ( Fig. 2 View FIGURE 1 – 11 a) with 2 denticles. Lingua subequal in length to superlingua and rounded apically ( Fig. 4 View FIGURE 1 – 11 ). Maxillae with palpi 2.0 times the length of galea­lacinia ( Fig. 5 View FIGURE 1 – 11 ). Labium ( Figs. 6 View FIGURE 1 – 11 a–b) with segment II of palpi with rounded distomedial projection, 2.1 times width of segment III, segment III conical.

Thorax yellowish­brown, without color pattern. Pleura and sterna yellowish brown. Legs ( Fig. 7 View FIGURE 1 – 11 ) yellowish­white, tarsal claws 0.3 times the length of tarsi, with 2 rows of denticles, small basally, increasing in size distally ( Fig. 8 View FIGURE 1 – 11 ). Hind wing pads present.

Abdomen yellowish­brown, without distinct color pattern. Posterior margin of terga with spines as long as wide ( Fig. 9 View FIGURE 1 – 11 ). Sterna yellowish­brown. Gills whitish, external margin sclerotized, main branch of trachea weakly pigmented ( Fig. 10 View FIGURE 1 – 11 ). Paraprocts with 19 spines apically ( Fig. 11 View FIGURE 1 – 11 ).

Adults. Unknown.

Etymology. From the Tupi­guarani language açu, meaning large. An allusion to the size of the species.

Discussion. This species can be distinguished from the other species of the genus by the following combination of characters, 1) frontal keel absent; 2) labrum with a pair of subapical setae near middle ( Fig. 1 View FIGURE 1 – 11 a); 3) labium with segment II of palpi with rounded distomedial projection, 2.1 times the width of segment III ( Fig. 6 View FIGURE 1 – 11 b); 4) tarsal claws 0.3 times the length of tarsi ( Fig. 7 View FIGURE 1 – 11 ); 5) hind wing pads present; 6) posterior margin of abdominal terga with spines as long as wide ( Fig. 9 View FIGURE 1 – 11 ); 7) gills with main branch of trachea poorly pigmented ( Fig. 10 View FIGURE 1 – 11 ); 8) paraprocts with 19 spines apically ( Fig. 11 View FIGURE 1 – 11 ).

Material. Holotype, female nymph: BRAZIL, Rio de Janeiro State, Itatiaia, córrego ao lado da estrada do Abrigo Rebouças km 10, 16/ X/ 1997, Salles col. Paratypes: 4 nymphs same data (mouthparts, legs and paraprocts of one nymph mounted on slides). The holotype and 2 paratypes are deposited at IBRJ. Other paratypes are deposited at IFML.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Ephemeroptera

Family

Baetidae

Genus

Paracloeodes

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