Three new species of Tricorythopsis (Ephemeroptera: Leptohyphidae) from southeastern Brazil

Three new species of Tricorythopsis Traver (Ephemeroptera: Leptohyphidae) are described and illustrated based on nymphs from southeastern Brazil. These new species can be distinguished from other species of the genus by the following characters: Tricorythopsis araponga sp. n.: (1) femora with long setae; (2) abdominal segments 5–7 with dorsal tubercles; (3) tarsal claws with 4–6 marginal denticles and 7 + 4 submarginal denticles. Tricorythopsis baptistai sp. n.: (1) tarsal claws with 4–5 large marginal denticles and one submarginal denticle on each side; (2) abdominal colour pattern; (3) abdomen without tubercles; (4) coxae without projections. Tricorythopsis pseudogibbus sp. n.: (1) abdominal segments 6–8 with small dorsal tubercles; (2) tarsal claws with four large marginal denticles, and 3 + 1 or 2 submarginal denticles; (3) coxae dorsally projected; (4) femora broad and with short setae; (5) pronotum with anterolateral projection.