Mesoleptobasis

Garrison, Rosser W. & Ellenrieder, Natalia Von, 2009, Redefinition of Mesoleptobasis Sjöstedt 1918 with the inclusion of Metaleptobasis cyanolineata (Wasscher 1998) comb. nov. and description of a new species, Mesoleptobasis elongata (Odonata: Coenagrionidae), Zootaxa 2145, pp. 47-68 : 51-52

Key to Females of Mesoleptobasis

1. Pronotum with projections (as in Fig. 4 a; Fig. 5 d) ............................................................................................. 2

1'. Pronotum lacking projections, its posterior margin slightly bi-or trilobate ( Figs. 5 a, b, e, f) .................................... 3

2. Pronotal projections in dorsal view with a common stem and apices directed dorso-laterally ( Fig. 5 d); Guyana and Saramacca and Marowijne Districts in Surinam ( Fig. 21 ) ............................................................ M. cyanolineata

2'. Pronotal projections in dorsal view with no common stem, acuminate apices directed laterally (as in Fig. 4 a); Rondônia State in Brazil............................................................................ M. sp. ( M. acuminata sensu Santos, 1961 )

3. Costal side of FW pt shorter than basal side, its posterior margin convex ( Fig. 12 a); posterior lobe of pronotum trilobate with medial lobe smoothly convex and extending posteriorly beyond level of lateral lobes ( Fig. 5 a); Amazonian region of Peru ( Fig. 21 ) ........................................................................................................ M. acuminata

3'. Costal side of FW pt subequal to longer than basal side, its posterior margin slightly convex ( Figs. 12 b, 13b–c); posterior lobe of pronotum bi- or trilobate, in the latter case medial lobe reaching same level as lateral lobes posteriorly ( Figs. 5 b, c, e–g).............................................................................................................................................. 4

4. FW CuA ending one or two cells proximal to vein descending from subnodus ( Fig. 13 b); Para District in Surinam and Amazonas State in Brazil ( Fig. 21 ) ............................................................................................. M. elongata

4'. FW CuA ending at or one or two cells distal to vein descending from subnodus ( Fig. 12 b, 13c) ............................ 5

5. Middle lobe of hind margin of prothorax bent anteriorly ( Figs. 5 f, g); ovipositor surpassing tip of cerci for a distance shorter than length of cerci ( Fig. 16 e); Amazonas State in Venezuela and Amazonas and Rondônia States in Brazil ( Fig. 21 ) ............................................................................................................................................... M. incus

5'. Middle lobe of hind margin of prothorax not bent anteriorly ( Figs. 5 b, c); ovipositor surpassing tip of cerci for a distance subequal to length of cerci ( Fig. 16 b); Amazonas and Rondônia States in Brazil ( Fig. 21 ) .............. M. cantralli

Figures

FIGURE 12. Female wings. (a) Mesoleptobasis acuminata, Peru, Explorama Lodge; (b) M. cantralli, paratype, Brazil, Porto Velho.

FIGURE 13. Female wings. (a) Mesoleptobasis cyanolineata, paratype, Surinam, Mungatapoe; (b) M. elongata, allotype; (c) M. incus, paralectotype, Brazil, Rio Autaz.

FIGURE 16. Female S 8 – 10, lateral view. (a) Mesoleptobasis acuminata, Peru, Explorama Lodge; (b) M. cantralli, paratype, Brazil, Porto Velho; (c) M. cyanolineata, paratype, Surinam, Mungatapoe; (d) M. elongata, holotype; (e) M. incus, paralectotype, Brazil, Rio Autaz.

FIGURE 21. Distribution of Mesoleptobasis.