Heteragrion majus Selys, 1886

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 : 65-66

Heteragrion majus Selys, 1886

( Figs. 47a–e )

[Key locator: Key to Group B species, couplet 21’]

Heteragrion majus: Selys 1886: 62–63 (description of ♁ from Panama; comparison with H. aequatoriale );— Calvert 1901: 62–63 (remarks; fig. 6);— Calvert 1909: 108 (comparison with H. aequatoriale );— Ris 1918: 86–87 (additions to original description; description of ♀; comparison with H. erythrogastrum );— Williamson 1919: 35 (key to species, ♁ in couplet f1, ♀ in couplet d1; comparison with H. albifrons ; figs. 42–43, 62, 67, 91–92, 106, 129–130, 156–157);— Paulson 1981: 303 (comparison of coloration patterns with other Heteragrion species);— Garrison et al. 2010: 88, 91 (list of Heteragrion species; fig. 395);— Garrison & von Ellenrieder 2013: 15, 23 (list of species from Costa Rica; fig. 20);— Ramírez & Gutiérrez-Fonseca 2013: 97–100 (description of F0 larvae; key to larvae known to Costa Rica, couplet 2);— Molinar et al. 2015: 87 (list of species from Panama).

Material examined. 1♁, 1♀ COSTA RICA, San Jose, Hacienda Zurqui , 16.viii.1979, (1500m asl), R.W. & J.A. Garrison leg., ABMM .

Known distribution. Costa Rica, Panama.

Diagnosis and remarks. The following character combination distinguishes this species from the remainder of Group B species: BP with a nearly straight margin, bearing no swelling or convexity ( Figs. 47c–e ); MP the shortest portion of cercus in length ( Figs. 47c–e ); ridge above ML formed by spaced and very strong teeth ( Figs. 47c–e ), 2–3 strong teeth on its apex ( Fig. 47e ); ML apex acute ( Figs. 47c–e ).

Figures

FIGURE 47. Heteragrion majus: (a) anterior view of head; (b) lateral view of pterothorax; (c, e) mediodorsal view of cercus; (d) dorsal view of cercus. ML: medial lobe; AP: apical portion. Figure e provided by Rosser Garrison and Natalia von Ellenrieder.