Discovering the diversity of tadpoles in the mid-north Brazil: morphological and molecular identification, and characterization of the habitat 1Centro de Estudos Superiores de Caxias, Universidade Estadual do Maranhão, Caxias, Maranhão, Brazil 2Departamento de Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, SP, Brazil 3Gothenburg Global Biodiversity Center, University of Gothenburg, Gothenburg, Sweden DOI 10.7717/peerj.16640 Academic Editor Virginia Abdala...