Minagrion canaanense Santos, 1967

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 : 183-184

Minagrion canaanense Santos, 1967

Figs. 1c (♂ hab), 2e–f (♂ and ♀ tub), 3i–l (♂ app), 4c (♂ lig), 6c (♀ lob), 7b (♀ ptx), 8c–d (♂ app, lost holotype), 9d–f (♀ lost allotype)

Minagrion canaanense, Santos (1967) : 7 −9 (original description ♂ and ♀);— Lencioni (2006): 170 (illustrated guide, distribu- tion);— Garrison et al. (2010): 287, 289 (synonymic list, illustrations).

Holotype ♂: BRAZIL, Espírito Santo State, Santa Tereza, Swamp in the road to Nova Lombardia Forestal Reserve , 14.i.1967, N.D. Santos & C. Elias leg., in MNRJ ; Allotype ♀: Minas Gerais State, Governador Valadares , 14.i.1958, K. Lencko leg., in MNRJ [examined] .

Specimens examined. Total: 10♂♂, 1♀. 8♂♂, 1♀, BRAZIL, Espírito Santo State, Santa Tereza, Nova Lom- bardia Forestal Reserve , 14 and 15.1.1967, N.D. Santos leg., in MNRJ ; 1♂, Espírito Santo State, Santa Tereza , 01.i.1968, P. Elias leg., in FAAL ; 1♂, Minas Gerais State, São Gonçalo do Rio Abaixo , PETI Environmental Sta- tion, x.1988, A.B.M. Machado leg., in ABMM .

Diagnosis. This species presents a unique combination of characters that separates it from the remaining species: larger size (but smaller than M. mecistogastrum ), longitudinal ridge of cercus not entire (i.e. disrupted along cercus), more pronounced on apical 1/2 ( Figs. 3 i–l, 8c–d); sclerotized apex of cercus globose with no apparent teeth ( Figs. 3l , 8d ); tubercle quadrangular with a slightly concave apex ( Fig. 2e ); segment one of genital ligula with a pair of thin lateral sclerotized processes in flexure, inner fold sub triangular in lateral view, proximal to flexure, segment two very long, bifid, with a pair of projections on its apex ( Fig. 4c ). Posterior lobe of female prothorax not divided in separated lobes, medially concave ( Fig. 6c ), laterally slightly elevated ( Fig. 7b ); lateral margin of prothorax widens towards the base ( Fig. 7b ); genital valves slightly surpass S10 posterior margin not reaching level of cercus ( Fig. 9f ); notopleural suture a smoothly curved line ( Fig. 7b ); tubercle roughly quadrangular with irregular margins ( Fig. 2f ).

Distribution. Similar to M. caldense , M. canaanense has a limited range of occurrence and to this date it is known only from the States of Espírito Santo and Minas Gerais. It is also a rare species in collections, and of the examined material the most recent specimen was collected in 1988.

Figures

FIGURE 1. Male habitus: (a) caldense, São Roque de Minas, at ECOEVO; (b) caldense, Poços de Caldas, at FAAL; (c) canaanense, Santa Tereza, at FAAL; (d) mecistogastrum, Salesópolis, at FAAL; (e) ribeiroi, Recreio dos Bandeirantes PARATYPE, at FAAL; (f) waltheri, São Gonçalo do Rio Preto, at ABMM.

FIGURE 2. S1 tubercle; (a) ♂ caldense, Poços de Caldas, at FAAL; (b) ♂ caldense, São Roque de Minas, at LESTES; (c) ♀ caldense ALLOTYPE, Poços de Caldas, at MNRJ; (d) ♀ caldense, SCNP, at ECOEVO; (e) ♂ canaanense, Santa Tereza, at FAAL; (f) ♀ canaanense ALLOTYPE, Santa Tereza, at MNRJ; (g) ♂ mecistogastrum, Salesópolis, at FAAL; (h) ♀ mecistogastrum, Salesópolis, at FAAL; (i) ♂ ribeiroi, Recreio dos Bandeirantes PARATYPE, at FAAL; (j) ♀ ribeiroi, Salesópolis, at FAAL; (k) ♂ waltheri, São Gonçalo do Rio Preto, at ABMM; (l) ♀ waltheri, São Gonçalo do Rio Preto, at ABMM.

FIGURE 3. Male anal appendages; (a–d) ♂ caldense, Poços de Caldas, at FAAL; (e–h) ♂ caldense, São Roque de Minas, at LESTES; (i–l) ♂ canaanense, Santa Tereza, at FAAL; (m–p) ♂ mecistogastrum, Salesópolis, at FAAL; (q–t) ♂ ribeiroi, Recreio dos Bandeirantes PARATYPE, at FAAL; (u–x) ♂ waltheri, Jaboticatubas, at FAAL.

FIGURE 4. Male genital ligula; (a) caldense, Poços de Caldas PARATYPE, at MNRJ probably lost; (b) caldense, SCNP PARA- TYPE of M. franciscoi, at ABMM; (c) canaanense, Santa Tereza, at RWG; (d) mecistogastrum, Cachoeira de Macacu, at RWG; (e) ribeiroi, Recreio dos Bandeirantes, at RWG; (f) waltheri, São Gonçalo do Rio Preto, at ABMM.

FIGURE 6. Female posterior lobe of prothorax; (a) caldense, Poços de Caldas ALLOTYPE, at MNRJ; (b) caldense, SCNP, at ECOEVO; (c) canaanense, Santa Tereza ALLOTYPE, at MNRJ; (d) mecistogastrum, Salesópolis, at FAAL; (e) ribeiroi, Salesópolis, at FAAL; (f) waltheri, São Gonçalo do Rio Preto, at ABMM.

FIGURE 7. Female prothorax in lateral view; (a) caldense, Poços de Caldas PARATYPE, at ABMM; (b) canaanense, Santa Tereza ALLOTYPE, at MNRJ; (c) mecistogastrum, Salesópolis, at FAAL; (d) ribeiroi, Salesópolis, at FAAL; (e) waltheri, São Gonçalo do Rio Preto, at ABMM.

FIGURE 8. Male anal appendages of Minagrion holotypes probably lost during the fire at MNRJ in 2018; (a–b) caldense, Poços de Caldas; (c–d) canaanense, Santa Tereza; (e–f) ribeiroi (Telagrion ribeiroi), Recreio dos Bandeirantes; (g–h) waltheri (Telagrion serracipoense), Jaboticatubas.

FIGURE 9. Female structures of Minagrion allotypes probably lost during the fire at MNRJ in 2018; (a–c) caldense, Poços de Caldas; (d–f) canaanense, Santa Tereza; (g–i) ribeiroi (Telagrion ribeiroi), Recreio dos Bandeirantes; (j–l) waltheri (Telagrion serracipoense), Jaboticatubas.