Heteragrion peregrinum Williamson, 1919

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 : 76

Heteragrion peregrinum Williamson, 1919

( Figs. 55a–e )

[Key locator: Key to Group B species, couplet 13 (12)]

Heteragrion peregrinum: Williamson 1919: 51–56 (key to species, ♁ in couplet b1, ♀ in couplet d2; diagnosis and description of ♁ and ♀ from Colombia; figs. 6, 7, 52–53, 59, 73, 96, 167–168);— Garrison et al. 2010: 88 (list of Heteragrion species);— Bota-Sierra & Novelo-Gutiérrez 2017: 555 , 567 (table of information; key to species, ♁ in couplet 4, ♀ in couplet 5; remarks; figs. 1, 3l, 4n–o, 8b–c);— Stand-Pérez et al. 2019: 92–93 , 109–110 (table of information; key to species, ♁ in couplet 12, ♀ in couplet 12; remarks; figs. 6e–f, 11a–c, 15g –i, 20).

Material examined. 1♁ Chocó Department, Unión Panamericana Municipality, Corregimiento Salero , 24.vii.2010, (6.6108, -74.5771, 100m asl), L. Pérez & J. Montes leg., UARC ; 1♁ Risaralda Department, Pueblo Rico Municipality, Corregimiento Santa Cecilia, Alto Amurrupá Reserve , Ranas de Cristal stream, 26.ix.2018, (5.3203, -76.1736, 620m asl), C. Bota leg., CEUA .

Known distribution. Northwestern Colombia.

Diagnosis and remarks. According to the IUCN Red List, H. peregrinum is assessed as Vulnerable, based on “its restricted range and decline in potential habitat”, and the type location has been severely modified since its discovery (Bota-Sierra 2021). The species was recently rediscovered in some other areas, but always in small numbers (Bota-Sierra 2021). The following character combination distinguishes this species from the remainder of Group B species: BP the longest, with nearly straight margin ( Fig. 55e ); MP subequal in length to AP ( Fig. 55e ); ridge above ML long, bearing strong teeth on a straight line, not reaching its apex ( Figs. 55c–e ); ML apex acute ( Figs. 55c–e ).

Figures

FIGURE 55. Heteragrion peregrinum: (a–b) anterior view of head; (c–d) dorsal view of cerci; (e) mediodorsal view of cercus. BP: basal portion; ML: medial lobe.