Revision of the genus Minagrion Santos, 1965 (Odonata: Coenagrionidae)
Vilela, Diogo Silva
Anjos-Santos, Danielle
Koroiva, Ricardo
Cordero-Rivera, Adolfo
Guillermo-Ferreira, Rhainer
Zootaxa
2020
2020-06-02
4786
2
176
198
5T9S
Santos, 1965
in Santos
1965
[151,446,225,251]
Insecta
Coenagrionidae
Minagrion
Animalia
Odonata
3
179
Arthropoda
genus
Typespecies: Telagrion mecistogastrumSantos, 1965by original designation. Santos (1965b): 9 (genus proposed with M. mecistrogastrumas the typespecies and including Agrion waltheri, Telagrion ribeiroiand M. caldense sp. nov.);— Santos (1967): 7−9 (original description of M. canaanense ♂and ♀);— Garrison (1991): 13 (synonymic list);— Carvalho & Nessimian (1998): 13 (habit and habitats of larvae occurring in Rio de Janeiro State);— Costa & Mascarenhas (1998): 11 (Catalogue of typeshoused in the MNRJ, comments);— Costa et al.(2000): 12 (species list, records, distribution, references);— Lencioni (2004): 91−92 (relationships of Minagrionwith Telagrion);— Costa et al.(2001): 437, 440, 446 (species list, mention of M. ribeiroi);— Lencioni (2006): 17, 43, 169−173 (diagnosis, illustrations, distribution);— Heckman (2008): 299, 335−337 (key, illustrations, distribution);— Garrison et al.(2010): 134, 287−289 (generic key, diagnosis, illustrations, distribution, habitat, comments);— Côrtes et al.(2011): 136 (distribution of M. waltheriin Tocantins State);— Hämäläinen (2013): 30 (mention of M. waltherinamed after Walthère de Selys Longchamps);— Machado & Bedê (2015): 290−291, 294 (occurrence of M. waltheri; description of M. franciscoi, additional distribution of M. caldensein Minas Gerais Stateas “ Minagrion caldensis” in p. 294, illustration of genital ligula, comparison with Minagrion franciscoi).— Vilela et al.(2016): 489 (distribution of M. waltheriin Minas Gerais State, ecological data);— Lencioni (2017): 247, 383−396 (diagnosis, illustrations, distribution);— Renner et al.(2017): 3−6 (distribution of M. waltheriin Rio Grande do Sul State);— Rodrigues & Roque (2017): 2 (distribution of M. waltheriin Mato Grosso do Sul State);— Dalzochio et al.(2018): 6 (distribution of M. waltheriin Rio Grande do Sul State). Other species included. Minagrion waltheri, Minagrion ribeiroi, Minagrion caldense, Minagrion canaanense, Minagrion franciscoinew syn.
Diagnosis.Medium to large coenagrionids ( 28–61 mm, Figs. 1a–f, 5a–j); male anal appendages forcipate with a medial longitudinal ridge on medial surface of cercus: apically armed with a rounded sclerotized lobe (dorsal plate); the ventral portion of which forms a ventrobasal expansion varying in size (see Figs. 3a–x, 8a–h); paraprocts vestigial with an acute tip, shorter or subequal to 1/2 cercus; genital ligula with an inner fold next to flexure, sclerotized lateral process at the flexure, apex entire (e.g. Fig. 4a–b) or bifid ( Fig. 4c), surpassing level of or almost at the same level of inner fold ( Fig. 4e); female posterior lobe of prothorax slightly convex, uni- ( Fig. 6a–c) or trilobate ( Fig. 6d–f) in dorsal view; in lateral view, posterior margin of prothorax entire ( Fig. 7c) or divided ( Fig. 7a–b, d–e) in the posterior lobe region, notopleural suture a sinuous ( Fig. 7c) or smoothly curved line ( Fig. 7b); S8 with no vulvar spine ( Fig. 9c, f, i, l); vulvar laminae always surpassing posterior margin of S10, reaching or not the level of cercus; presence of a longitudinal process (here called tubercle) on both sexes, which consists in a thin projection on the venter of S1, larger on males (e.g. Figs. 2a–l).
Distribution.Endemic to Brazilpredominantly in the Southeastern region.