Heteragrion demarmelsi Stand-Pérez, Bota-Sierra & Pérez-Gutiérrez, 2019

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 : 44-45

Heteragrion demarmelsi Stand-Pérez, Bota-Sierra & Pérez-Gutiérrez, 2019

( Figs. 29a–e )

[Key locator: Key to Group B species, couplet 28 (26)]

Heteragrion demarmelsi: Stand-Pérez et al. 2019: 90–112 (key to species, ♁ in couplet 9, ♀ in couplet 7’; description and diagnosis of specimens from Colombia; comparison with H. inca and H. chlorotaeniatum ; figs. 5c–d, 9a–c, 14g –i, 16d–e, h–i, 18).

Material examined. 1♁ (HOLOTYPE) COLOMBIA, Amazonas Department, Leticia Municipality, Monifue Amena Center, Tacana River , 6.x.2005, (-4.0953, -69.9305, 71m asl), (Code MPUJ_ENT 0061372), MPUJ; 15♁♁ Amazona Department, Leticia Municipality, Monifue Amena Center, Tacana River , 6.x.2005, (-4.0952, -69.9305, 71m asl), MPUJ; 1♁ (PARATYPE) Amazonas Departament, Leticia Municipality, Km 11 Multi-ethnic Refuge Ticuna-Uitoto, Road to Zafire, Tacana River , (80m asl), A. Clavijo leg., CEUA .

Known distribution. Colombian Amazon.

Diagnosis and remarks. This newly described species was already assessed as Endangered by the IUCN Red List, as it “occurs in a small area threatened by urban and agricultural expansion” (Bota-Sierra & Sandoval 2021). Regarding its identity, it is close to H. inca , being separated by the lateral view of cercus and some head coloration patterns. The following character combination distinguishes this species from the remainder of Group B species: ridge above ML with a single row of teeth ( Figs. 29c–d ); male postclypeus yellow with brown transverse line ( Fig. 29a ); in dorsal view, cercus slightly elbowed along its midlength ( Fig. 29e ).

Figures

FIGURE 29. Heteragrion demarmelsi: (a) anterior view of male head; (b) anterior view of female head; (c) mediodorsal view of cercus; (d) dorsal view of cercus; (e) lateral view of cercus; BP: basal portion; MP: medial portion; ML: medial lobe.