Macunahyphes eduardoi, Almeida, Everlin & Mariano, Rodolfo, 2015

Almeida, Everlin & Mariano, Rodolfo, 2015, New species and first records of Macunahyphes Dias, Salles & Molineri, 2005 (Ephemeroptera: Leptohyphidae) from Bahia state, Brazil, Zootaxa 4000 (4), pp. 497-500 : 498-499

Macunahyphes eduardoi sp. nov.

( Figures 1–4 )

Diagnosis. The male imago of Macunahyphes eduardoi sp nov. can be distinguished from all congeners by the following combination of characteristics: 1) Forewing translucent with costal and subcostal area tinged with grey and with longitudinal vein CuP absent ( Figure 1 ); 2) penes wide ( Figure 4 ); 3) penes lobes with pair of elongated spines with small lateral hook-shaped projections from the base to the middle region. ( Figure 2 ).

Description. Male imago. Length: body, 3.23 mm; forewings, 2.83 mm. General coloration: thorax chestnut, legs and abdomen whitish with greyish marks.

Head: yellowish tinged with black on hind and front margin, antennae pale. Thorax: pronotum yellow pale tinged completely with black except for two median bands ( Figure 3 ), prosternum yellow pale tinged slightly with black. Mesonotum chestnut tinged with grey and suture tinged with grey; mesosternum yellowish chestnut. Metanotum chestnut with anterior region tinged with grey; metasternum yellow tinged slightly with gray. Legs: coxae and trochanters yellowish tinged with grey; femora yellowish with base tinged with grey and anterior region with black band; tibia and tarsi grayish. Wings ( Figure 1 ): forewing translucent with costal and subcostal area tinged with grey; hind wings absent. Abdomen: terga I-VII pale tinged with grey; terga VIII-X pale yellow tinged with grey. Genitalia ( Figure 4 ): styliger plate and penes opaque yellow, forceps whitish; styliger plate projected posteriorly as columnar base; penes wide, with pair of elongated projections with small, hook-shaped lateral expansions distributed from its base to middle region ( Figure 2 ). Lateral filaments tinged with grey, except at joints; terminal filament pale with base grey at joints.

Material examined. Holotype, male imago, Brazil, Bahia, Igrapiúna, Michelin Ecological Reserve, Pacangê River, Pacangê-Sapucaia 2ª Ponte, 13º50’17.1’’S, 39º14’27.7’’W, 101 m, Calor, A.R. & Equipe LEAq, 21.IX.2012 ( CZNZ); paratypes, seven male imagos, same data as holotype (four specimens at MZUSP and three specimens at CZNC).

Etymology. This species is dedicated to Eduardo Domínguez for being a great friend and for his contributions to the knowledge on South America mayflies.

Remarks. The absence of vein CuP in the forewings, the absence of hind wings, and the styliger plate being projected posteriorly as a columnar base, allow the placement of this new species in Macunahyphes . Unlike the others species, Macunahyphes eduardoi sp. nov. has unusually-shaped penes for the genus, and this is the most important characteristic to distinguish the new species. Another characteristic in the new species is the presence of a basal swelling in segment II of the forceps, which is unlike M. australis that has the segment II flattened at base. The original descriptions of M. pemonensis and M. incognitus do not include pertinent details about the forceps, and so we do not compare them here.

Figures

FIGURES 1 – 4. Macunahyphes eduardoi sp. nov. (Ephemeroptera, Leptohyphidae). Male imago. Figure 1. Forewing. Figure 2. Detail of elongated projections of penes (ventral view). Figure 3. Habitus (dorsal view, scale 1 mm). Figure 4. Genitalia (ventral view).