Psaironeura, Williamson, 1915, Williamson, 1915

Mendoza-Penagos, Cristian Camilo, Juen, Leandro, Muzón, Javier & Vilela, Diogo Silva, 2022, Psaironeura jeronimoi (Odonata: Zygoptera: Coenagrionidae) sp. nov. from the Brazilian Amazon rainforest, with a key for species of tenuissima group, and discussion on the significance of the genital ligula to the taxonomy of the group, Zootaxa 5196 (2), pp. 291-300 : 299

Keys to males of the tenuissima group (adapted from to Garrison, 2004)

1. Tip of cercus in dorsal or posteromedial view branched or bluntly rounded, but without black tooth in the external branch ( Fig. 3 h−i).................................................................................... P. tenuissima .

1’. Tip of cercus in dorsal or posteromedial view branched, with a black tooth in the external branch...................... 2

2. Tip of cercus in dorsal or posteromedial view branched, both external and internal branch with distinct black tooth ( Fig. 3 e−f).......................................................................................... P. bifurcata .

2’. Tip of cercus in dorsal or posteromedial view branched, with external branch armed with distinct black tooth and internal branch with an ante-apical rounded lobe ( Fig. 3 b−c)................................................. P. jeronimoi .

Figures

FIGURE 3. Lateral, dorsal and middorsal view of cerci of: (a, b, c) Psaironeura jeronimoi sp. nov. male holotype; (d, e, f) Psaironeura bifurcata (Sjödsted, 1918); (g, h, i) Psaironeura tenuissima (Selys, 1886). Abrevations:AaL, anteapical lobe; AaT, anteapical tooth; At, apical tooth; EB, external branch of cerci; IB, internal branch of cerci; VbP, ventrobasal process of cercus. Scale bar = 0.5 mm.