New species and stages description of Traverella Edmunds, 1948 (Ephemeroptera Leptophlebiidae) from Northeast Brazil Author Nascimento, Stênio R. S. Author Lima, Lucas R. C. 0000-0001-5943-3351 Universidade Estadual do Piauí (UESPI), Campus Heróis do Jenipapo, Laboratório de Biodiversidade, Cep 64280 - 000, Campo Maior, Piauí State, Brazil. lucaslima _ 86 @ hotmail. com; https: // orcid. org / 0000 - 0001 - 5943 - 3351 lucaslima_86@hotmail.com Author Mariano, Rodolfo Author Azevêdo, Carlos A. S. 0000-0002-0503-3843 casazevedo @ yahoo. com. br; https: // orcid. org / 0000 - 0002 - 0503 - 3843 casazevedo@yahoo.com.br text Zootaxa 2020 2020-10-19 4861 3 411 422 journal article 9032 10.11646/zootaxa.4861.3.7 e3e8f325-7ce2-4262-a3f0-78500edec1cc 1175-5326 4416461 31F68A22-668F-4E9D-B41B-266F76A6656D Key to nymphs of Traverella from Brazil 1. Frontoclypeal projection present ( Figs 6D , 7A )................................................... T. maranhensis - Frontoclypeal projection absent.......................................................................... 2 2(1) . Labrum width 2.5× the maximum length............................................. Traverella excelsior sp. nov. - Labrum width 2.8× the maximum length ( Nascimento & Salles 2013 : fig. 14D)............................. T. insolita