Amphipteryx, Selys, 1853

González-Soriano, Enrique, 2010, A synopsis of the genus Amphipteryx Selys 1853 (Odonata: Amphipterygidae), Zootaxa 2531 (1), pp. 15-28 : 17

Key to males of Amphipteryx

1. Hind lobe of prothorax evenly curved, with lateral lobes small and rounded with medial margins bent anteriorly ( Figs. 1–2 ); cercus in dorsal view curved medially and armed with a blunt quadrate lobe along medial 0.40 ( Figs. 24 , 32–34 ); paraproct slender, slightly surpassing cercus and with medially curved tip terminating in a single tooth ( Figs. 24 , 28 ); Hidalgo, Puebla, Oaxaca and Veracruz states, Mexico ( Fig. 41 ) .. A. agrioides

1'. Hind lobe of prothorax with erect digit-like lateral lobes ( Figs. 3–5, 10–12 ), or with middle lobe bent cephalad ( Figs. 6, 13 ); cercus in dorsal view linear and lacking a blunt quadrate lobe along medial 0.40 ( Figs. 25–27 , 35, 37–38 ); paraproct dorso-ventrally flattened, as long as ( Figs. 25 , 29 , 35 ) or considerably shorter ( Figs. 26–27 , 30–31 , 37–38 ) than cercus and terminating in an angular ( Figs. 35–36 ) to quadrate ( Figs. 37– 38 ) tip; Chiapas state, Mexico, Honduras and Guatemala ( Fig. 42 ).................................................................... 2

2(1'). Hind lobe of prothorax continuous, raised, lateral lobes vertical, semicircular, and continuous with smaller irregular v-shaped middle lobe ( Figs. 6, 13 ); Honduras ( Fig. 42 ) ........................................ A. meridionalis

2'. Hind lobe of prothorax with erect digit-like lateral lobes ( Figs. 3–5, 10–12 ); Chiapas state, Mexico, and Guatemala ( Fig. 42 ) ....................................................................................................................................................... 3

3(1'). Paraproct as long as cercus ( Figs. 25 , 29 , 35 ) and terminating in an angular tip ( Figs. 35–36 ); erect lateral lobes of prothorax as long as interval between them ( Figs. 3–4 ); Guatemala ( Fig. 42 ) .......................... A. nataliae

3'. Paraproct considerably shorter than cercus ( Figs. 27 , 31 , 38 ) and terminating in a quadrate tip ( Figs. 38 ) erect lateral lobes of prothorax much shorter than interval between them ( Fig. 5 ); Chiapas state, Mexico ( Fig. 42 )......... ........................................................................................................................................................... A. chiapensis

Figures

FIGURES 1–13. 1–9. hind lobe of prothorax, antero-lateral view; 10–12: same, lateral view; 13: same dorsal view.

FIGURES 24–27. male caudal appendages, dorso-lateral view.

FIGURES 32–40. 32–38. male caudal appendages, dorsal view; 39: tip of cercus, medio-ventral view; 40: female S9– 10, lateral view.

FIGURES 28–31. Male caudal appendages, lateral view.

FIGURES 41–42. distribution of Amphipteryx spp.