Minagrion

Vilela, Diogo Silva, Anjos-Santos, Danielle, Koroiva, Ricardo, Cordero-Rivera, Adolfo & Guillermo-Ferreira, Rhainer, 2020, Revision of the genus Minagrion Santos, 1965 (Odonata: Coenagrionidae), Zootaxa 4786 (2), pp. 176-198: 179

publication ID

https://doi.org/10.11646/zootaxa.4786.2.2

publication LSID

lsid:zoobank.org:pub:9EEAC300-4179-41B9-B51F-FDB4131CD991

persistent identifier

http://treatment.plazi.org/id/03B61158-FFDD-FFC2-FF44-A3C0FA2ABBA5

treatment provided by

Plazi

scientific name

Minagrion
status

 

Key to males of Minagrion  (cercus in mediodorsal view, except when otherwise indicated)

1. Larger species (54−61 mm total length), abdomen 2x longer than Fw length ( Fig. 1dView FIGURE 1)................. M. mecistogastrum 

1’. Medium species (31−44 mm total length), abdomen less than 2x the length of Fw (as in Fig. 1b, eView FIGURE 1)..................... 2

2. Dorsal plate of cercus broad; ventrobasal portion only 1/5 of the cercus length ( Figs. 3View FIGURE 3 u−x, 8g−h); tubercle digit-like with a rounded apex ( Fig. 2kView FIGURE 2)......................................................................... M. waltheri 

2’. Dorsal plate of cercus narrow (as in Fig. 3h, tView FIGURE 3); ventrobasal portion at least 1/2 of cercus length (as in Fig. 3tView FIGURE 3); tubercle never digit-like or with rounded apex.......................................................................... 3

3. Longitudinal ridge of cercus not entire (i.e. disrupted along its length) forming a basal and an apical ridge, more pronounced on the distal 1/2 ( Fig. 3lView FIGURE 3); sclerotized apex of cercus globose with no apparent teeth ( Figs. 3lView FIGURE 3, 8dView FIGURE 8); tubercle quadrangular with a slightly concave apex ( Fig. 2eView FIGURE 2)................................................................ M. canaanense 

3’. Longitudinal ridge of cercus entire (i.e., a continuous ridge along its length, as in Fig. 3d, tView FIGURE 3); sclerotized apex of cercus not globose, with evident teeth; tubercle not as above............................................................ 4

4. Cercus shorter than S 10 in lateral view, ( Figs. 3View FIGURE 3 q–t, 8e–f) and with acute sclerotized apex, with one strong tooth ( Figs. 3tView FIGURE 3, 8eView FIGURE 8); tubercle triangular with acute apex ( Fig. 2iView FIGURE 2)........................................................ M. ribeiroi 

4’. Cercus subequal in length to S 10 in lateral view, rounded sclerotized apex, with one strong tooth; dorsal portion of cercus broad at basal half, narrowing towards the base, ventrobasal portion roughly quadrangular, reaching 1/2 of cercus ( Figs. 3View FIGURE 3 a–h, 8a–b); tubercle quadrangular, with the excavated “beak-like” apex ( Fig. 2View FIGURE 2 a–b); genital ligula with a small inner fold at the flexure in lateral view, a pair of lateral sclerotized processes, and entire apex ( Fig. 4View FIGURE 4 a–b)............................ M. caldense