Heteragrion dorsale Selys, 1862

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 : 8-9

Heteragrion dorsale Selys, 1862

Figs. 40A–C (♂ thx), 71 (map)

Heteragrion dorsale Selys, 1862: 23–24 [21–22 reprint] (description of male); Selys, 1886: 57 (species diagnosis); Williamson, 1919: 24 (discussion); Costa & T. C. Santos, 2000: 4 (key); Machado, 2006: 1065 (redescription of holotype); Garrison et al, 2010: 88 (list).

Types. Male holotype in IRSNB (not examined).

Additional material examined. None.

Distribution. Only the type locality: Brazil: Rio de Janeiro State: Nova Friburgo.

Diagnosis. Only known by the holotype, currently diagnosed from congeners only by color as indicated in

Machado's (2006) redescription reproduced here: " Mesepisternum orange with black marks as follows: at the middorsal, basal and antealar carinae extending below to the acrotergal area and above to the antealar sinus; a semicircular spot adjoining the upper 1/4 of the humeral suture. A narrow stripe adjoining the middorsal carina at each side visible only at its upper third, extending laterally to the lower third of the antealar carina. Mesepimeron with a black stripe occupying all the extent of the sclerite, continuing below into the mesinfrepisternum. It has a brownish orange area at its lower extremity. Small one at the anterodorsal part. Mesinfraepisternum black with a brownish orange anterodorsal part becoming brownish orange at its lower extremity and continuing below into the metinfraepisternum; a metepimeral one, black becoming brownish orange at its upper extremity ”. Appendages missing.

Remarks: As pointed out by Machado (2006), the specimen illustrated by Lencioni (2005) is not H. dorsale but represents an as yet undescribed species.

Figures

FIGURE 40. Heteragrion dorsale male: (A) thorax in lateral view, (B) thorax in dorsal view, (C) prothorax in dorsal view;