title: A new species of the genus Hermanella Needham & Murphy (Ephemeroptera: Leptophlebiidae) from Northeastern Brazil.
abstract: Hermanella angeli sp. nov. (Holotype male deposited in MZUSP: Itacaré municipality, Cachoeira Bom Sossego, 14°20'05.2"S, 39°01'27.4"W, 31.VII.2012, Mariano, R, Almeida, E & Costa, S. leg.) is described based on imagos and nymphs from the State of Bahia, Brazil. The new species can be distinguished by the following combination of characteristics, in male imagos: (1) costal and subcostal area of forewing brown (Fig. 5b); (2) thorax and abdominal terga predominantly brown (Fig. 2-3); (3) penes divided in apical 1/8 (Fig. 8); (4) penis lobe with ventral, long, curved spine (Fig. 7); (5) prosternum narrow (Fig. 1). In nymphs: (1) tarsal claws with 2-3 accessory denticles (Fig. 19); (2) mandible without setae near basal articulation (Fig. 13a); (3) prostheca of left mandible with spines on inner margin (Fig. 13b); (4) plate-like gills terminated in a finger-like process (Fig. 11).
authors.affiliation: Programa de Pós-Graduação em Zoologia, Universidade Estadual de Santa Cruz, Rodovia Ilhéus-Itabuna, km 16, Ilhéus, BA, Brazil.; Email: e.verliins@gmail.com.
authors.forename: Everlin
authors.initials: E
authors.lastname: Almeida
authors.affiliation: Programa de Pós-Graduação em Zoologia, Universidade Estadual de Santa Cruz, Rodovia Ilhéus-Itabuna, km 16, Ilhéus, BA, Brazil.; Email: unknown.
authors.forename: Sabrina
authors.initials: S
authors.lastname: Costa
authors.affiliation: Departamento de Ciências Biológicas, UESC-Universidade Estadual de Santa Cruz, Rodovia Ilhéus-Itabuna, km 16, Ilhéus, BA, Brazil.; Email: rodolfomls@gmail.com.
authors.forename: Rodolfo
authors.initials: R
authors.lastname: Mariano
mesh_terms: D000825:Animal Structures / Q000033:anatomy & histology / Q000254:growth & development; D000818:Animals; D049628:Body Size; D001938:Brazil; D065133:Ephemeroptera / Q000033:anatomy & histology / Q000145:classification* / Q000254:growth & development; D005260:Female; D008297:Male; D009758:Nymph / Q000033:anatomy & histology / Q000145:classification / Q000254:growth & development; D009929:Organ Size