Ulmeritoides mirr, Neto, Jaime De Liege Gama & Passos, Mahedy Araujo Bastos, 2016

Neto, Jaime De Liege Gama & Passos, Mahedy Araujo Bastos, 2016, Leptophlebiidae (Ephemeroptera) from Roraima State, Brazil: description of two new species of Ulmeritoides Domínguez, 1991, Zootaxa 4178 (2), pp. 295-300 : 298-300

Ulmeritoides mirr sp. nov.

( Figs. 3–4 , 10 –14 )

Diagnosis:. Ulmeritoides mirr sp. nov. can be separated from all congeners by the following combination of characters: 1) forewing and hind wing with membrane hyaline, except for base tinged with dark brown and costal and subcostal areas light brown ( Fig. 10 ); 2) apex of posterior scutal protuberance with a transversal yellowish line ( Fig. 4 ); 3) penis lobes with a ventral groove, apex rounded ( Figs. 13–14 ).

Maximum length: body 10.8–11.5mm (n=10); forewings: 6.9–7.1mm (n=10); hindwings 0.9–1.1mm (n=10)

Head ( Figs. 3–4 ): general coloration blackish. Frons black. Upper portion of compounds eyes light brown; lower portion blackish. Ocelli white, surrounded with black. Antennae brown.

Thorax ( Figs. 3–4 ): pro-, meso- and metanotum light brown; mesoscutelar impression blackish; mesoscutal suture yellow; apex of the posterior scutal protuberance with a yellow line; pleura yellowish shaded with brown. Sterna brown.

Wings ( Figs. 10–12 ): membrane hyaline, with brown base. Forewings with costal and subcoastal areas light brown; longitudinal veins brown; cross vein translucent brown; blackish spot on bulla of vein Sc; costal membrane with 0–4 cross veins basal to bulla. Hind wings with longitudinal and cross veins brown.

Legs: leg I with coxae and femora yellowish-brown; tibiae light brown; tarsi and tarsal claws brown. Legs II and III with coxae and femora yellowish-brown; tibiae whitish, with apex shaded with light brown; tarsi and tarsal claws of both legs white. Leg II with tarsal segments I–III shaded with brown on basal 2/3.

Abdomen: ( Figs. 3–4 ): Terga I–VII completely grayish-brown; terga VIII–IX yellowish-brown. Sterna grayish brown, except sternum IX, yellowish-brown.

Genitalia ( Figs. 13–14 ): styliger plate yellowish-brown; penes and forceps grayish-brown. Apex of penis lobes rounded; each lobe with a longitudinal ventral groove. Caudal filaments yellowish-brown with black ring at the base of each segment.

Female imago and nymph. Unknown.

Material. HOLOTYPE: 1 male imago, BRAZIL, Roraima State, Mucajaí municipality, stream in Tamandaré vicinity (2°28’50.53’’"N/ 60°55'29.52"W), 30.v. 2016 a 3.vi.2016, Cruz, J.A., coll. (INPA—EPH 000016) . PARATYPES: 9 male imagos, same data as holotype (5 INPA—EPH 0 0 0 0 17 and 4 CZNC—EP 7007).

Etymology. The epithet " mirr ", noum in apposition, is in honor of the Museu Integrado de Roraima ( MIRR ), institution who has supported research on Ephemeroptera in Roraima.

Remarks. Ulmeritoides mirr sp. nov. resembles U. passorum because of the yellowish transversal line on the apex of the posterior scutal protuberance, apex of penes lobes rounded and both penes and forceps light brown. Despite that it keys out as Ulmeritoides angelus Souto, Da-Silva, Nessimian & Gonçalves, 2016 in the identification key proposed by Salles & Domínguez (2012) and modified by Souto et al. (2016). However, the new species can be easily distinguished from U. passorum by the forewings with costal and subcostal areas tinged with brown and lobes of penis with a ventral groove. The new species can be separated from U. angelus by the penis lobes with a ventral groove and without a spine.

Figures

FIGURES 1 – 4. Male imagos of Ulmeritoides species: 1 – 2. Ulmeritoides aurantifrons sp. nov. in lateral (1) and dorsal (2) views; 3 – 4. Ulmeritoides mirr sp. nov. in lateral (3) and dorsal (4) views.

FIGURES 10 – 14. Ulmeritoides mirr sp. nov., (10) Forewing; (11) Hind wing; (12) Hind wing enlarged; (13) Genitalia (ventral view); (14) Penis enlarged (ventrolateral view).