Thraulodes pinhoi, Lima, Lucas R. C., Mariano, Rodolfo & Pinheiro, Ulisses, 2013

Lima, Lucas R. C., Mariano, Rodolfo & Pinheiro, Ulisses, 2013, New species for Thraulodes Ulmer, 1920 (Ephemeroptera: Leptophlebiidae: Atalophlebiinae) and the first key to adults from Brazil, Zootaxa 3709 (3), pp. 230-242: 240-241

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Thraulodes pinhoi

sp. nov.

Thraulodes pinhoi  sp. nov., Mariano & Lima

( Figs. 8–9View FIGURES 2 – 9; 16–17; 31–34)

Diagnosis. The male adult of this species can be separated from all the other congeners by a combination of the following characters: (1) costal membrane basal to bulla without cross veins ( Fig. 8View FIGURES 2 – 9); (2) costal and subcostal zones of the forewing translucent ( Fig. 8View FIGURES 2 – 9); (3) two brown bands tinged with black ( Fig. 34View FIGURES 31 – 34); (4) abdominal segments translucent brown, with anterolateral dark spots and two medial black spots on segments II –VI ( Figs. 31–32View FIGURES 31 – 34; (5) spines of penes long and narrow, apicolateral area forming an “ear”, lateral pouch present, and recurved fold parallel to inner margin ( Figs. 16–17View FIGURES 10 – 17).

Male imago. Length: body, 8.9 mm; forewings, 8.2 mm; hind wing, 2.0 mm; general coloration light brown.

Head: black; antenna light brown with scape brown; upper portion of eyes reddish brown, lower portion black; ocelli white with a black ring at base.

Thorax ( Fig. 31–33View FIGURES 31 – 34): pro-, meso- and metanotum brown. Pronotum with medial region brown and lateral margins whitish. Meso- and metanotum light brown with sutures dark brown; recurrent scuto-scutellar suture whitish; episternum of prothorax whithish with purple maculae; mesosternum dark brown with a medial white macula; metasternum dark brown.

Wings ( Figs. 8–9View FIGURES 2 – 9): membrane of forewing hyaline, with dark spot near base; costal and subcostal zones translucent. Longitudinal and cross veins faintly brown. Veins ICu 2 and CuP not joined basally. Costal membrane without cross veins basal to bulla and with 11 cross veins distal to bulla, some of these anastomosed. Membrane of hind wings hyaline with seven cross veins and a dark spot near base.

Legs ( Fig. 34View FIGURES 31 – 34): legs with femur pale yellow, two brown bands tinged with black; tibiae pale yellow with apex black; tarsi yellow with the last tarsomere brownish black.

Abdomen ( Fig. 31–32View FIGURES 31 – 34): general coloration translucent brown; tergum I brown with a medial black spot; terga II –VI translucent brown with anterolateral dark spots and two medial black spots, tergum VII light brown with an anterolateral dark spot and two medial black spots; terga VIII –X light brown. Sternum I light brown; sterna II –VI translucent; sternum VII with anterior margin light brown and posterior margin whitish; sternum VIII whitish with lateral margins purple; sternum IX yellow with whitish spots on lateral margins with a purple spot on posterior margin.

Genitalia ( Figs 16–17View FIGURES 10 – 17): forceps whitish, apex of segment I and segment II washed with black. Posterior margin of subgenital plate almost straight with medial rounded projection. Penes yellowish; penes 2 / 3 divided apically, with a pair of long and narrow spines, 2.8 x the width of penes; apicolateral area forming an “ear”; external margin forming lateral pouch and recurved folds parallel to inner margin. Terminal filament whitish with base of segments black.

Female and nymph. Unknown.

Type material. Holotype: male imago, Brazil, Santa Catarina State, Urubici, Cachoeira Avental, 28 °02.798’S, 49 ° 37.070 ’W, 1229m, 08.i. 2012, light trap, L.C. Pinho, H.F. Mendes & R. Moreto colls ( MZUESC). Paratype: same data as holotype, 0 6 male imagos (01 MZUESC, 0 2 IML, and 0 3 CZNC).

Etymology. Dedicated to our friend Dr. Luis Carlos de Pinho, Chironomidae  specialist, one of the collectors of the type material.

Remarks. Thraulodes pinhoi  sp. nov. is similar to T. luizgonzagai  sp. nov and T. paysandensis Traver, 1964  from Argentina and Uruguay in the following characteristics: small species, forewings membrane hyaline, subgenital plate with medial projection, and penes with a pair of long and narrow subapical spines. Thraulodes pinhoi  sp. nov. differs from both by the penes with spines very long (2.8 x the width of penes) and apicolateral area forming an “ear”, and subgenital plate with a triangular rounded projection (narrow and rounded in T. luizgonzagai  sp. nov. and dome-shaped in T. paysandensis  ).


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