Ulmeritoides passorum Gama-Neto & Hamada, 2014

Boldrini, R. & Lima, L. R. C., 2017, New species and stages description of Ulmeritoides Traver, 1959 (Ephemeroptera: Leptophlebiidae) from Roraima State, Northern Brazil, Zootaxa 4282 (2), pp. 385-394 : 390-393

Ulmeritoides passorum Gama-Neto & Hamada, 2014

( Fig. 14–24)

Diagnoses. Female imago:1) large body size (> 7.7 mm); 2) base of wings tinged with brown ( Fig. 14). Nymph: 1) medial denticle of anteromedial emargination of labrum much larger than others; 2) tusk on inner margin of maxillae hardly developed; 3) posterolateral projections present on abdominal segments II–IX; 4) lines of pectinate setae on ventral surface of tibia III forming one main line.

Female imago. Length: body: 7.7–8.8 mm; forewings: 9.3–10.1mm; hind wings: 1.4–1.5 mm.

General color light brown ( Figs. 14), darker in the living specimen ( Fig. 24).

Head ( Fig. 14): Washed with black. Scape and pedicel brown; ocelli white, blackish basally.

Thorax ( Fig. 14): Nota with anteronotal protuberance, medioscutum, submedioscutum, posterior scutal protuberance and scutellum brown; sterna brown.. Wings ( Figs. 15, 16, 16 a): membrane of forewing hyaline, wing base brownish; main longitudinal and intercalaries veins dark brown, cross-veins pale yellow; one cross-vein basal to bulla. Membrane of hind wings ( Figs. 16, 16 a) hyaline; longitudinal veins brownish, cross-veins pale yellow.

Legs: Fore femur brown, fore tibia and fore tarsus dark brown

Abdomen ( Fig. 14): when without eggs, light brown.

Nymph. Length: Body: 6.9–7.3 mm. Nymphal exuviae: Tibia I: 1.2 mm; Tibia II: 1.2 mm; Tibia III: 1.4 mm.

General coloration ( Fig. 17): Brown.

Labrum ( Fig. 18): Subrectangular, broader than long; with one middle large and apically rounded denticle.

Mandibles: Apical 1/2 of right mandible with inner and outer margin with fine long setae; inner and outer incisive, respectively, with two and three denticles. Left mandible ( Fig. 19) with outer margin with fine long setae; inner and outer incisive with three denticles.

Maxilla ( Fig. 20, 20 a): Tusk on inner apical margin hardly developed; one robust and fifteen subapical pectinate setae.

Labium: Segment I with fine, simple setae scattered on inner margin; and outer margin with a row of setae increasing in length toward apex, and pectinate, long setae near apex. Segment II with fine, simple setae scattered on inner and outer margin; dorsally with a diagonal row of nine simple setae. Segment III with fine, simple setae scattered on inner and outer margin.

Thorax: Light brown.

Legs: Light brown. Foretibia and foretarsi brown.

Leg I ( Fig. 21): Femur outer margin with long, pectinate setae; dorsal surface with long, pectinate setae near outer margin, and with spine-like setae and short, fine, pectinate setae near inner margin, and with spine like setae on midline. Tibia inner margin with a row of long, pectinate setae; dorsal and ventral surface with fine, long, simple setae near outer margin, and with short, fine pectinate setae near inner margin. Tarsi inner margin with a row of short, pectinate setae, and outer margin with fine, long simple setae. Claws with eight denticles increasing in length toward apex.

Leg II ( Fig. 22): Femur inner margin with a row of spine-like setae; outer margin with long pectinate setae and a row of spine-like setae; dorsal surface with spine-like setae on margins and at the midline. Tibia inner margin with a row of long, pectinate setae; dorsal and ventral surface with fine, long, simple setae near outer margin; dorsal surface with six spine-like setae near inner margin.

Leg III ( Fig. 23): Femur outer and inner margin with a row of spine-like setae; dorsal surface with spine-like setae on margins and at the midline. Tibia inner and outer margins with a row spine-like setae; dorsal surface with a row of spine-like setae near inner margin; ventral surface with one row of pectinate setae.

Abdomen: Terga brown. Posterolateral projections lighter, present on abdominal segments II-IX. Sterna brown. Gills gray, tracheae and fimbriae gray-violet. Caudal filaments light brown.

Distribution. Brazil: Roraima: Amajari and Pacaraima.

Material examined. Four female imago, Brazil, Roraima, Amajari , Serra do Tepequém , Igarapé Cocal , 3°73’N/ 61°72’W, 01.xi.2014, Boldrini, R. coll ( UFRR) . Two nymphs (one mature nymph), Brazil, Roraima, Amajari , Serra do Tepequém, Igarapé Cocal , 3°73’N/ 61°72’W, 01.xi.2014, Boldrini, R. coll ( UFRR) . One immature nymph, Brazil, Roraima, Amajari , Serra do Tepequém, Igarapé Cocal , 3°73’N/ 61°72’W, 18.xii.2014, Boldrini, R., Barroso, P.C.S. colls ( UFRR) . One male imago, Brazil, Roraima, Amajari , Serra do Tepequém, Igarapé Cocal , 3°73’N/ 61°72’W, 18.xii.2014, Boldrini, R coll ( UFRR) . Three male imago, Brazil, Roraima, Pacaraima, Igarapé Samã , 4°28’30.8’’N / 61°09’44.4’’W, 12.vi.2014, Boldrini, R. coll ( UFRR) . Three male imago, Brazil, Roraima, Pacaraima, Igarapé Samã , 4°28’30.8’’N / 61°09’44.4’’W, 11.vi.2014, Boldrini, R. coll ( UFRR) . One male imago (reared), Brazil, Roraima, Amajari , Serra do Tepequém, Igarapé Cocal , 3°73’N/ 61°72’W, 18.xii.2014, Boldrini, R. coll ( UFRR) .

Comments. The adults of U. passorum have similar characters to U. flavopedes adults. The males share the apex of the penis lobe rounded, and males and females share the forewing with costal and subcostal areas hyaline. Both species can be found in savanna areas in the Roraima State, but the U. passorum specimens can be found at altitudes>300 meters above the sea level, while U. flavopedes can be found in areas near 100 meters above the sea. The adults of U. passorum are easily recognized by the presence of brownish wing bases.