Heteragrion valgum Donnelly, 1992

(Figs. 67a–e)

[Key locator: Key to Group B species, couplet 16’] Heteragrion valgum: Donnelly 1992: 56–57 (key to species, couplet 5; description and diagnosis of ♁ and ♀ from Panama; comparison with H. mitratum and H. erythrogastrum; figs. 5.3, 5.8, 5.10, 5.15);— Suhling 1999: 51 (recorded in El Valle, Panama);— Garrison et al. 2010: 88 (list of Heteragrion species);— Molinar et al. 2015: 87 (list of species from Panama);— Stand-Pérez et al. 2019: 92–93, 110 (table of information; key to species, ♁ in couplet 14; remarks; figs. 6d, 11g –i, 20).

Material examined. 1♁ (PARATYPE) PANAMA, Panama, Cerro Azul, 2.vii.1970, (ca. 700m asl), E.S. Morton leg., FAAL ; 1♁ COLOMBIA, Chocó Department, Acandí Municipality, Vereda Rufino, Quebrada Capitancito, 10.xii.2005, (8.5787, -77.3109, 30m asl), C. Botero leg., UARC ; 5♁♁ same data, but ANDES–E .

Known distribution. Panama and Northwestern Colombia.

Diagnosis and remarks. This species is assessed as Data Deficient in the IUCN Red List, as it occurs at a limited number of localities and has been collected only once recently (González-Soriano & Guzmán Ojeda 2021b). In cercus morphology, H. valgum is close to H. chrysops, H. eboratum, H. calendulum and H. alienum, with which it shares the MP ridge bearing only small teeth and not partially covering ML. This species can be separated from these and the remainder of Group B species by the following character combination: ridge above ML consisting of a patch of small denticles, not in a single row (Figs. 67d–e); ML apex acute (Figs. 67d–e).