Heteragrion pemon De Marmels, 1987

Vilela, Diogo Silva, Lencioni, Frederico A. A., Bota-Sierra, Cornelio A., Ware, Jessica L. & Bispo, Pitágoras C., 2023, Taxonomic revision of the Neotropical genus Heteragrion Selys, 1862 (Zygoptera: Heteragrionidae): male morphology, new species and illustrated key, Zootaxa 5356 (1), pp. 1-96 : 75

Heteragrion pemon De Marmels, 1987

( Figs. 54 a–d )

[Key locator: Key to Group A species, couplet 5’]

Heteragrion pemon: De Marmels 1987: 231–233 (description and diagnosis of ♁; comparison with H. ictericum and H. consors , figs. 25–30, 50);— De Marmels 1990: 335 (species recorded in Venezuela);— De Marmels 1992: 39 (description of ♀; figs. 1–3);— Hartung 2002: 191 (comparison of genital ligula with H. palmichale );— De Marmels 2004: 447 (remarks and additional ♀ characters; figs. 24, 29);— Garrison et al. 2010: 88 (list of Heteragrion species);— Vivas-Santeliz & De Marmels 2017: 50 (species endemic to Venezuela);— von Ellenrieder et al. 2017: 3 (list of species from Guyana).

Material examined. 1♁ VENEZUELA, Bolivar state, El Pauji , 4.viii.1990, (1000m asl), R.W. Garrison leg., ABMM .

Known distribution. Southeastern Venezuela.

Diagnosis and remarks. This species possesses a tubercle or apophysis on the ventral BP portion, a feature that is shared only with H. triangulare and H. ictericum . De Marmels (1987) stated that H. pemon keys out to H. ictericum following Williamson’s key (1919), but no further morphological characters are provided to separate the two species. In fact, it is highlighted that “ H. pemon is probably restricted to the “Gran Sabana”, a highland plateau on which the famous “Tepuis” (table mountains) stand” ( De Marmels 1987). DSV and FAAL have seen specimens of both species (not the types), and, apart from coloration characters, they seem to be identical in their morphology. At any rate, we are waiting for examination of the types and a molecular analysis to test the monophyly of these species.

Figures

FIGURE 54. Heteragrion pemon: (a) anterior view of head; (b) lateral view of pterothorax; (c–d) mediodorsal view of cercus.