New species and new records of Miroculis Edmunds, 1963 (Ephemeroptera: Leptophlebiidae) from Chacoan Domain in northeastern Brazil.

The genus Miroculis Edmunds, 1963 (Ephemeroptera: Leptophlebiidae) is endemic to South American with 27 described species. In Brazil, 21 of these are known to occur. The present paper describes three new species of Miroculis Edmunds, 1963.

Description of a new species, nymphs of two known species and a new record of Miroculis/ Edmunds, 1963 (Ephemeroptera: Leptophlebiidae) from Brazil.

Miroculis is one of the most diversified Neotropical genera of Leptophlebiidae in South America with 26 species currently known. In this work we describe a new species of Miroculis based on imagos from Amazonas, and the unknown nymphs of Miroculis (Miroculis) caparaoensis and Miroculis (Ommaethus) misionensis, both associated with imagos. In addition, Miroculis (Ommaethus) misionensis is recorded for the first time from Brazil.

The nymph of Hermanellopsis arsia Savage amp; Peters, 1983 (Ephemeroptera: Leptophlebiidae) from Brazilian Northeastern Region.

Hermanellopsis Demoulin, 1955 is a genus of Leptophlebiidae known from adults of both sexes and is represented solely by two species, both from South America: Hermanellopsis arsia Savage Peters, 1983, described only from male subimago; and H. incertans (Spieth, 1943) described from male imago and female subimago. Edmunds et al.

A new species of Miroculis Edmunds, 1963 (Ephemeroptera: Leptophlebiidae) from northeastern Brazil.

Miroculis stenopterus, sp. nov., is described based on material from State of Pernambuco, Northeastern Brazil.