Heteragrion bariai De Marmels, 1989

(Figs. 14a–g)

[Key locator: Key to Group B species, couplet 27 (25’)]

Heteragrion bariai De Marmels 1989: 15–16 (description of ♁ and ♀ from Venezuela; figs. 8–18);— De Marmels 1990: 335 (species recorded in Venezuela);— Butt 1995: 95 (list of species);— De Marmels 2004: 440 (brief larval description; figs. 25, 30, 38, 42);— Daigle 2005: 167 (comparison with H. bickorum);— Garrison et al. 2010: 88, 91 (list of Heteragrion species; fig. 393);— Bota-Sierra 2014: 97–100 (first record for Colombia);— Vilela et al. 2019a: 188, 191 (description of ♀ intersternite; key to Group B ♀ occurring in Brazil, in couplet 2; figs. 2, 5, 11);— Stand-Pérez et al. 2019: 96–97 (key to species, ♁ in couplet 8, ♀ in couplet 11; remarks, comparison with other Heteragrion species occurring in Colombia; figs. 4e–f, 7g –i, 12g –i, 17);— Koroiva et al. 2020a: 21 (listed among species deposited at INPA);— Koroiva et al. 2020b: (recorded in Amazonas state, Brazil);— Stand-Pérez et al. 2020: 381 (recorded in Serranía de Chiribiquete National Natural Park, Colombia);—Miranda-Filho et al. 2022: 9 (ocurring in Acre state, Brazil).

Material examined. 1♁ BRAZIL, Rondônia state, Fazenda Rancho Grande, 2–11.xi.1989, (-10.8333, - 63.1166), R.W. Garrison leg., ABMM ; 7♁♁ Porto Velho, Jirau, 12.x.2013, A.L. Andrade & A.P. Faria leg., LABECO ; 1♁ Nova Mutum, 5.v.2013, F.G. Carvalho leg., LABECO ; 1♁ Amazonas state, Manacapuru, AM-353, km 66, 25.iii.2008, (-3.0405, -60.7752), INPA ; 1♁ Presidente Figueiredo, 18.vii.2007, (km 20), N. Hamada leg., INPA ; 1♁ Presidente Figueiredo, Uatumã, Balbina, 30.ix.2009, Ulisses Neiss leg., INPA ; 1♁ Presidente Figueiredo, Ramal do km 24, Sitio do Sr Jose Souza, 20.iv.2008, (-2.0548, -60.0366), INPA ; 1♁ Presidente Figueiredo, Ramal do km 24, Sitio do Sr Jose Souza, 20.iv.2008, (-2.0638, -60.0398), INPA ; 2♁♁ São Gabriel da Cachoeira, BR-307, Km 01, 25.xi.2007, C. Azevedo, R. Keppler leg., INPA ; 1♁ São Gabriel da Cachoeira, Sede da Agrotécnica Federal, 15-27.xi.2007, C. Azevedo, R. Keppler leg., INPA ; 1♁ Roraima? state, São João da Baliza, 29.xi.2006, INPA ; 1♁ Pará state, Flona de Carajás, Igarapé Afluente do Rio Águas Claras, 24.viii.2022, (-5.9881, -50.4984, 240m asl), G. Desidério leg., INPA ; 1♁ Acre state, Igarapé do Véi, 18.vii.2022, (-7.4589, -73.6327, 220m asl), G. Desidério leg., INPA ; 4♁♁ same data, but 25.vii.2022; 4♁♁ same data, but 19.vii.2022; 1 ♁ ECUADOR, Puerto Ahuano, 16.xi.2010, (-1.0531, -77.5496), A.C. Rivera leg., ECOEVO ; 3♁♁ Jatún Sacha, 31.x.2014, (-1.0781, -77.6106), I. Sanmartín-Villar leg., ECOEVO ; 17♁♁ COLOMBIA, Caquetá Department, Araracuara Municipality, Guacamayo Guard, xii.2015, (-0.6308, -72.2497), L. Pérez leg., UARC ; 3♁♁ Meta Department, San Martín Municipality, Rey Zamuro Reserve, vi.2014, (3.5417, -73.3572, 265m asl), C. Moreno leg., CEUA . 1♁ Amazonas Department, Leticia Municipality, Yahuarcaca Lake, (-4.1942, -69.9547), ANDES–E; 2♁♁ Puerto Nariño Municipality, Natura Park, El Vergel Community, (-3.8594, -70.2046, 91m asl), Y. Cano leg., ANDES-E; 1♁ Meta Department, San Martín Municipality, ANDES-E; 2♁♁ Vaupés Department, Mitú Municipality, Rivera Caño Sangre, (1.2145, -70.2337, 188m asl), M. Sánchez leg., ANDES-E .

Known distribution. Brazil (Acre, Amazonas Pará and Rondônia states), Colombia (Orinoco basin and Amazon), Ecuador, Peru and Venezuela.

Diagnosis and remarks. Stand-Pérez et al. (2019) pointed out the close morphological similarity between H. bariai and three other species: H. mitratum, H. flavidorsum, and H. bickorum . However, it can be differentiated from these and other Group B species by the following set of characters: BP the longest cercus portion (Fig. 14d), bearing a developed convexity (Fig. 14e); ridge above ML straight, long, partially covering ML in dorsal and dorsolateral views (Figs. 14f–g); MP-AP junction marked, being rounded or angled (Figs. 14d –g); ML apex acute (Fig. 14d).