Heteragrion gracile Machado, 2006

LENCIONI, F. A. A., 2013, <p> <strong> Diagnoses and discussion of the group 1 and 2 Brazilian species of <em> Heteragrion </ em>, with descriptions of four new species (Odonata: Megapodagrionidae) </ strong> </ p>, Zootaxa 3685 (1), pp. 1-80 : 9-10

Heteragrion gracile Machado, 2006

Figs. 16 (♂ app), 31A–C (♂ thx), 52C (♂ habitus), 74 (map)

Heteragrion gracile Machado 2006: 1065 (male description); Garrison et al 2010: 88 (list).

Additional material examined. 2♂. Brazil: Espirito Santo State: Reserva Biológica Augusto Ruschi (formerly Nova Lombardia), 21-XII-2001 , 2♂, leg. K. S. Furieri.

Illustration made from following specimens. 1♂ —(Fig. 16A, 16B, 31A, 31B, 31C, 52C)— Brazil: Espirito Santo State: Reserva Biológica Augusto Ruschi (formerly Nova Lombardia), 21-XII-2001, leg. K. S. Furieri ( NC 3918 ) .

Distribution. Brazil (states of Minas Gerais, Espírito Santo and São Paulo).

Diagnosis. Thoracic pattern close to H. beschkii and H. luizfelipei (Figs. 32A,31E). Cercus in lateral view: dorsobasal expansion present. Ventrobasal expansion small but present occupying less than 1/3. Remainder almost straight (Fig. 16B). Cercus in mediodorsal view: apical portion very small, basal and medial portion subequal. Ventral expansion hairy. Medial process very wide triangular plate, external side with indentation; two sclerotized parallel ridges, one reaching tip of triangle, other reaching small step (Fig. 16A).