Heteragrion freddiemercuryi Lencioni, 2013

(Figs. 35a–d)

[Key locator: Key to Group A species, couplet 28’]

Heteragrion freddiemercuryi: Lencioni 2013: 15 (description of ♁ from São Paulo state, Brazil; diagnosis, distribution and comparison with other species; figs. 26, 38a–c, 58a, 76);— Lencioni 2017: 145–146 (general taxonomic information; distribution; figs. 69–70);—Ávila-Jr. et al. 2020: 121–130 (comparison with H. itacolomii; table 1; figs. 5c–d);— Araújo & Pinto 2021: 6 (recorded for Paraná state).

Material examined. 1♁ (HOLOTYPE) BRAZIL, São Paulo state, Itatins, Estação Ecológica Juréia, 9.iii.2000, (-24.3800, -47.0777, 10m asl), F.A.A. Lencioni leg., FAAL; 1♁ (PARATYPE) same data as holotype, but ABMM .

Known distribution. Brazil (São Paulo and Paraná states).

Diagnosis and remarks. Last collected in the year 2000, this rare species is assessed as Data Deficient in the IUCN Red List, pending additional collections to assess its actual status (Vilela & Guillermo-Ferreira 2021e). Morphologically close to H. flavovittatum and H. itacolomii, the following character combination distinguishes H. freddiemercuryi from these and the remainder of Group A species: upper plate small, slightly concave at its middle, bearing a posterior row of strong teeth (Fig. 35c), ridge fused with ML up to 1/2 of lower plate (Fig. 35d); ML apex squared, slightly angled medially (Fig. 35c).