Mecistogaster, Rambur, 1842

Soldati Lacerda, Déborah S. & Monteiro Machado, Angelo B., 2019, The damselfly genus Mecistogaster (Odonata: Pseudostigmatidae) from the Brazilian Atlantic Forest with a description of three new species and a neotype designation for M. amalia (Burmeister, 1, Zootaxa 4668 (2), pp. 207-228: 209

publication ID

https://doi.org/10.11646/zootaxa.4668.2.3

publication LSID

lsid:zoobank.org:pub:F41E013A-A2B0-4642-AED6-27777DA950B5

persistent identifier

http://treatment.plazi.org/id/03B187F2-F37D-8A72-FF11-F9A8FA4781A6

treatment provided by

Plazi

scientific name

Mecistogaster
status

 

Key to males of Mecistogaster  recorded in the Brazilian Atlantic Forest

1. Costal margin at level of pseudostigma of HW not projected anteriorly; cerci in lateral view straight........... M. linearis 

1’. Costal margin at level of pseudostigma of HW abruptly projected anteriorly ( Fig. 12View FIGURES 11–16); apex of cerci in lateral view bent ventrally ( Fig. 28View FIGURES 27–28)........................................................................................ 2

2. Anterior hamule with alula ( Fig. 17View FIGURES 17–18)...................................................................... 3

2’. Anterior hamule without alula ( Fig. 18View FIGURES 17–18).................................................................... 4

3. Mesepimeron totally reddish-brown ( Fig. 9View FIGURES 8–10); penis segment 2 in ectal view with one lateral elevation, in lateral view with contour foot-shaped ( Figs 23, 24View FIGURES 23–26).................................................................... M. amalia 

3’. Mesepimeron with reddish-brown area restricted to lower 1/5 of sclerite ( Fig. 8View FIGURES 8–10); penis segment 2 in ectal view with two lateral elevations, in lateral view with contour not foot-shaped ( Figs 25, 26View FIGURES 23–26)........................... M. nordestina  sp. nov.

4. Mesepimeron with reddish-brown area restricted to lower 1/5 of sclerite ( Fig. 8View FIGURES 8–10); contour of penis segment 2 in lateral view with dorsal and ventral margin straight ( Fig. 22View FIGURES 19–22), apex of inner fold projected ventroapically as a tubercle ( Fig. 22View FIGURES 19–22)........................................................................................... M. kesselringi  sp. nov.

4’. Mesepimeron totally reddish-brown ( Fig. 9View FIGURES 8–10); contour of penis segment 2 in lateral view with dorsal margin undulated and ventral margin with a semicircular elevation at midlength ( Fig. 20View FIGURES 19–22), apex of inner fold hardly visible, not projected ventroapically ( Fig. 20View FIGURES 19–22).............................................................................. M. mielkei  sp. nov.