(Figs. 44a–d)
[Key locator: Key to Group A species, couplet 28 (26’)]
Heteragrion johndeaconi: Lencioni 2013: 18–19 (description and diagnosis of ♁ and ♀; comparison with H. freddiemercuryi, H. brianmayi and H. rogertaylori; figs. 29, 39d–f, 44d–f, 49e–f, 59c–d, 76).
Material examined. 1♁ (HOLOTYPE) BRAZIL, Goiás state, Alto Paraíso de Goiás, Córrego João de Melo, 18.vi.2008, (-14.1819, -47.6433, 1198m asl), M.C. Almeida & S.L. Dutra leg., FAAL.
Known distribution. Brazil (Northeastern Goiás state).
Diagnosis and remarks. Little is known of this species other than its morphology; for this it has been assessed as Data Deficient in the IUCN Red List (Vilela & Guillermo-Ferreira 2021f). The following character combination distinguishes this species from the remainder of Group A species: upper plate small, rounded, bearing a posterior row of small teeth, not centered (Fig. 44c); broadly developed BP ventral concavity; in lateral view, BP very broad, tapering towards the apex, ML visible (Fig. 44d); ML apex roughly squared (Fig. 44c).