Heteragrion petiense Machado, 1988

(Figs. 56a–d)

[Key locator: Key to Group A species, couplet 22’]

Heteragrion petiense: Machado 1988: 267–274 (description of ♁ and ♀ from Minas Gerais state; comparison with H. flavovittatum and H. ovatum; figs. 1–3);— Lencioni 2005: 140 (data on description and distribution, illustration from Machado 1988; figs. 87a–b);— Machado & Bedê 2006: 50–52 (differences from H. tiradentense, H. muryense, H. flavovittatum and H. ovatum);— Garrison et al. 2010: 88 (list of Heteragrion species);— Machado et al. 2008: 459–460 (distribution and threatening status);— Blanke 2008: 13–14 (distribution record);— Lencioni 2013: 12 (synonymic list, types, distribution, diagnosis; figs. 22, 37d–f, 50c, 71);— Lencioni 2017: 153–154 (general taxonomic information; distribution; figs. 77–78);— Storari et al. 2019: 488 (list of species from Espírito Santo state).

Material examined. 1♁ (HOLOTYPE) BRAZIL, Minas Gerais state, Caeté, 6.xii.1987 C.M.S. Miranda, G.C. Oliveira, R.O.P. Queiroz-Filho & L.H.F. Souza e Silva leg., ABMM ; 1♁ (PARATYPE) Santa Barbara, Reserva de Peti, 25.x.1987, (-19.9000, -43.3833), A.B.M. Machado leg., ABMM ; 2♁♁ Bahia state, Macarani, Mata do Passarinho, 30.i.2014, J.E. Santos-Jr. leg., ABMM ; 1♁ Camacan, RPPN Serra Bonita, 21–28.i.2012 (1000m asl), A. Nemésio leg., ABMM .

Known distribution. Brazil (states of Bahia, Espírito Santo and Minas Gerais).

Diagnosis and remarks. The following character combination distinguishes this species from the remainder of Group A species: upper plate broad, slightly concave, bearing a posterior row of teeth (Figs. 56c–d); ML ridge located posteriorly, its apex bluntly shaped (Figs. 56c–d).