Ulmeritoides araponga, Salles & Domínguez, 2012

Salles, F. F. & Domínguez, E., 2012, Systematics and Phylogeny of Ulmeritus-Ulmeritoides revisited (Ephemeroptera: Leptophlebiidae), Zootaxa 3571, pp. 49-65 : 52-55

Ulmeritoides araponga sp. nov.

Holotype Male Imago (in alcohol, one pair of wings and genitalia on slides). Length: body, 8.5–8.7 mm; fore wings, 9.5–9.7 mm; hind wings, 1.7–1.8 mm. General coloration brownish, thorax and abdomen washed with black ( Figs. 1, 2). Head: light brown, washed with black. Upper portion of eyes light brown, lower portion blackish. Ocelli white, heavily washed with brown laterally, blackish basally. Antennae light brown. Thorax: pronotum light brown, tinged with black on lateral and posterior margins; meso and metanotum light orange-brown, margins and carinae darker; pleura yellowish-brown, margins of sclerites darker; sterna orange-brown, washed with black. Wings ( Figs. 5–6): membrane of fore wings ( Fig. 5a) hyaline, wing base brown; main longitudinal veins brownish, intercalaries yellowish, cross-veins hyaline; 8 cross-veins basal to bulla. Membrane of hind wings ( Figs. 5b, 6) hyaline, base brown; longitudinal and cross-veins hyaline, except C basal to costal projection, brownish. Legs: leg I brown except apex of femur, subapical portion of tibia and claws washed with black and apex of tibia and tarsi lighter; legs II and III yellowish-brown, tibiae lighter, subapical portion of tibia and tarsi of leg II darker; tarsi of leg III washed with gray; claws washed with black. Abdomen ( Figs. 1, 2): terga brownish, washed with black, lighter posteriorly; sterna lighter. Genitalia ( Figs. 7, 8): styliger plate, penes and base of forceps segment I brownish, distal part of forceps segment I and segments II and III yellowish, lighter towards apex. Internal apex of penes heavily washed with black. Apex of penis lobes straight, ending in rather acute apical and mesal projections. [Caudal filaments broken off and lost].

Mature nymph (in alcohol) ( Fig. 29). Body length, 6.8 mm. General coloration: brown to orange-brown with black markings. Head: brown, slightly washed with black, with whitish areas bellow median ocellus and between lateral ocelli and compound eyes, vertex with yellowish irregular marks. Ocelli whitish with inner margins black. Eyes of male with upper portions dark orange-brown, lower portion black. Eyes of female black. Antennae: scape and pedicel grayish-brown, flagellum translucent grayish-brown, paler toward apex. Mouthparts: labrum, mandibles, stipes, paraglossae, and first segment of maxillary and labial palpi brownish, remaining parts paler. Medial denticle on anteromedian emargination of labrum much larger than others ( Figs. 9a, b). Basal 2/3 of outer margin of mandibles with few setae, longer on median 1/3, apical 1/3 with setae denser ( Fig. 10). Tusk on inner apical margin of maxillae small ( Figs. 11a, b). Labium as in Fig. 12. Thorax: nota brown with blackish markings. Anterior half of mesonotum with a yellowish-brown longitudinal band, pleura and sterna grayish-brown. Legs ( Figs. 13–15): yellowish-brown to yellowish, coxae washed with black. Leg I with femora with median subapical areas darker, with a blackish spot, apex of tibiae with a blackish band. Leg II with central yellowish and subapical blackish spots, tibiae and tarsi yellowish. Leg III with femora with a median yellowish spot, tibiae and tarsi yellowish. Dorsal surface of all femora with numerous short, pointed spines ( Figs. 14, 15). Lines of pectinate setae on ventral surface of tibia III forming almost two lines ( Fig. 27). Claws light brown. Abdomen: terga orangebrown, darker posteriorly, lateral margins, including posterolateral projections, yellowish-brown. Sterna yellowishbrown, last segments darker. Gills gray, tracheae and fimbriae gray-violet. Caudal filaments yellowish-brown, alternating segment unions darker.

Material: HOLOTYPE: 1 male imago, BRAZIL, Minas Gerais, Araponga , Camping Vale das Luas, S 20° 39' 40.4'' / W 42° 27' 0.06'', alt. 1240 m., 17/iv/2004, F.F. Salles & C. N. Francischetti col. ( INPA) PARATYPES: 1 male imago and 3 nymphs, same data as holotype ( IFML); 10 nymphs, BRAZIL, Espírito Santo, Parque Nacional do Caparaó, Afluente do Rio Pedra Roxa em frente à sede do IBAMA , S 20° 23' 48.1'' / W 41° 44' 08.1'', alt. 1063 m., 20/iv/2008, F.F. Salles leg. ( CZNC); 5 nymphs, Espírito Santo, Parque Estadual da Pedra Azul, Cabeceira do Jucu , S 20° 25' 48.1'' / W 41° 01' 03.8'', alt. 1194 m., 17/x/2012, F.F. Salles & E. Raimundi, col. ( CZNC)

Biology: Nymphs of the new species were found in packs of leaf litter in the bottom of three streams, both located in well-preserved areas of Atlantic Forest at the Serra da Mantiqueira, Southeastern Brazil, always above 1000 m.s.a.l.

Etymology. araponga , name of the city where the holotype was collected.

Discussion. Ulmeritoides araponga sp. nov. can be separated from the other species of the genus by the following combination of characters. In the imago: 1) fore wings hyaline, base brown and without dark spots in bullae in Sc and R 1; 2) abdominal color pattern as in Figs. 1–2; 3) no cross-veins basal to bulla in fore wings ( Fig. 5a); 4) penis as in Figs. 7–8. In the nymph: 1) medial denticle on anteromedian emargination of labrum much larger than others ( Fig. 9a, b); 2) tusk on inner margin of maxillae hardly developed ( Fig. 11a, b); 3) dorsum of femora II–III with numerous, acute spines ( Figs. 14, 15); 4) femora II with small median black spot ( Fig. 14); lines of pectinate setae on ventral surface of tibia III forming almost two lines ( Fig. 27).