Nephepeltia

Ellenrieder, Natalia Von, 2014, A synopsis of the Neotropical genus Nephepeltia (Odonata: Libellulidae), including description of a new species, synonymies, and a key to males, Zootaxa 3796 (1), pp. 121-146 : 122-123

Key to males of Nephepeltia

1. Venter of thorax with a large conical spine about twice as long as wide ( Fig. 8 ); Guatemala to NE Argentina and S Brazil ( Fig. 16 )......................................................................................... N. phryne

1’. Venter of thorax with a small tubercle as long as wide or shorter, or smoothly convex ( Figs. 6–7 )..................... 2

2(1’). Spurs of inner row of hind tibiae closely set and peg-like at basal 0.40 ( Fig. 2 f); radial planate of both wings consisting of four or five cells, and usually with two cells at base of Fw discoidal field ( Fig. 3 f); venter of thorax smoothly convex ( Fig. 6 d); outer branch of hamule forming an anteriorly directed blunt hook ( Figs. 9 e; 10g); Panama to NW Argentina and Paraguay ( Fig. 16 )...................................................................................... N. leonardina

2’. Spurs of inner row of hind tibiae of about uniform length and placement or short and more closely set at basal 0.50–0.75, and gradually increasing in length apically or of variable length throughout ( Figs. 2 a–e); radial planate consisting of three cells, and with one cell at base of Fw discoidal field ( Figs. 3 a–e); venter of thorax with a tubercle ( Figs. 6 a–c; 7); outer branch of hamule rounded ( Figs. 9 a–d; 10a–f) 3

3(2’). Wings with a well defined basal golden spot surpassing triangle ( Fig. 3 e); inner branch of posterior hamule about as high as outer branch ( Fig. 10 c); medio-ectal sclerotized distal process of vesica spermalis distinctly longer than latero-ectal processes ( Fig. 11 d); cerci tips with a short apical spine directed dorsally ( Figs. 12 b; 13g); Ecuador, Peru, and W Brazil ( Fig. 15 ).............................................................................................. N. flavipennis

3’. Wings hyaline ( Fig. 3 a–d) or with a small basal diffuse yellowish spot; inner branch of posterior hamule clearly higher than outer branch ( Figs. 10 a–b, d–f); medio-ectal sclerotized distal process of vesica spermalis shorter than latero-ectal processes ( Fig. 11 a–c); cerci tips with an apical spine which is either long or oriented posteriorly ( Figs. 13 a–f).................. 4

4(3’). Distal end of ventral toothed carina of cercus at about distal fourth of its length ( Fig. 13 a); Suriname and NE Brazil to NE Argentina ( Fig. 15 ).......................................................................... N. aequisetis

4’. Distal end of ventral toothed carina of cercus at about distal half to third of its length ( Figs. 13 b–f)................... 5

5(4’). Spurs of inner row of hind tibiae of about uniform placement and length ( Fig. 2 b); medio-ectal sclerotized distal process of vesica spermalis much longer than wide, surpassing ventrally latero-ectal processes in lateral view ( Fig. 11 b); distal portion of cercus abruptly directed dorsally ( Fig. 13 b); SE Brazil, Paraguay, and NE Argentina ( Fig. 16 ).................. N. berlai

5’. Spurs of inner row of hind tibiae short and more closely set at basal 0.50–0.75, and gradually increasing in length apically ( Figs. 2 c–d); medio-ectal sclerotized distal process of vesica spermalis as short as wide, not surpassing ventrally latero-ectal processes in lateral view ( Fig. 11 c); distal portion of cercus gradually and slightly directed dorsally ( Figs. 13 c–f); Mexico to NE Argentina and S Brazil ( Fig. 15 )................................................................ N. flavifrons

Figures

FIGURE 2. Male hind tibiae, lateral view of inner surface.

FIGURE 3. Male wings. d. f.: base of discoidal field; r. p.: radial planate; sub.: cells between subtriangle and hind margin of wing.

FIGURE 6. Male thoracic venter, lateral view.

FIGURE 7. Male thoracic venter, lateral view, variability in N. flavifrons. [n – n]: number of cells under Fw subtriangle in left and right wings.

FIGURE 8. Male thoracic venter, lateral view, variability in N. phryne.

FIGURE 9. Male genital lobe, ventral view. o. b.: outer branch of hamule.

FIGURE 10. Male genital lobe, lateral view. i. b.: inner branch of hamule; o. b.: outer branch of hamule.

FIGURE 11. Male vesica spermalis, lateral (above) and ventral (below) view. l. e.: latero-ectal sclerotized distal process; m. e.: medio-ectal sclerotized distal process.

FIGURE 12. Nephepeltia flavipennis n. sp., holotype male. (a) Anterior lamina, anterior view; (b) S 10, dorsal view; (c) S 10, ventral view.

FIGURE 13. Male S 10, lateral view. (a) and (b) by RWG.

FIGURE 15. Distribution of Nephepeltia species.

FIGURE 16. Distribution of Nephepeltia species.