New Oriental tribe Iscini, new non-dilatognathan species of Notophlebia Peters & Edmunds 1970 and independent origin of Dilatognathus-type mouth apparatus in Atalophlebiinae (Ephemeroptera: Leptophlebiidae)

Abstract

A new tribe, Iscini tr. n., comprising the Oriental genera Isca Gillies 1951 and Notophlebia Peters & Edmunds 1970, is established. A new species, Notophlebia ganeshi sp. n., is described based on male and female imagos reared from larvae. The new species markedly differs from N. jobi Sivaramakrishnan & Peters 1984 by its non-specialized larval mouth apparatus. The larva of N. jobi has a highly specialized mouth apparatus of the «Dilatognathus-type»; this type of mouth apparatus has evolved independently in several non-related leptophlebiid taxa.

An estimate of the potential number of mayfly species (Ephemeroptera, Insecta) still to be described in Brazil

“…This is demonstrated clearly by the matrix of morphological traits used by Nieto (2010) for the analysis of South American baetid species, which was based on 104 characters for the nymphs, but only 14 for the adults. On a global scale, Kluge (2014) used 65 additional traits for the analysis of the nymphs (a total of 179) in comparison with the adults, for which only 114 traits were used (see http://www.insecta.bio.spbu.ru/z/ Eph-phyl/ index of characters.htm).…”