Number of previously recorded species of Trichoptera, Odonata, Hemiptera, Ephemeroptera, and Hydrophilidae (Coleoptera) for Ceará (blue) and Piauí (green). Dark blue or green represent the number of previously recorded species based on the literature. Light blue and green represent the number of species recorded for the first time in its respective state based on material collected at Ubajara (CE) and Sete Cidades (PI) National Parks. Number of undescribed species collected in these parks are given in red.