Minagrion waltheri (Selys, 1876)

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: 190-192

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Minagrion waltheri (Selys, 1876)


Minagrion waltheri (Selys, 1876) 

Figs. 1fView FIGURE 1 (♂ hab), 2k–l (♂ and ♀ tub), 3u–x (♂ app), 4f (♂ lig.), 5j (♀ hab), 6f (♀ lob), 7e (♀ ptx), 8g–h (♂ app, lost holotype), 9g–i (♀ lost allotype), 10f (alive ♂ specimen)

Agrion  (?) waltheri, Selys (1876)  : 1286 (original description ♂ and ♀)

Telagrion serracipoense, Santos (1956)  : 369 −374 (description ♂ and ♀)

Minagrion waltheri, Santos (1965a)  : 9 (new combination);— Santos (1965b): 43 (synonymy of T. serracipoense  with M. waltheri  );— Lencioni (2004): 91 −92 (relationships with Telagrion  );— Lencioni (2006): 173 (illustrated guide, distribution);— Garrison et al. (2010): 287, 288, 289 (synonymy list, illustrations, diagnosis);— Côrtes et al. (2011): 136 (distribution in Tocantins State);— Hämäläinen (2013): 30 (mentions the species named after Walthère de Selys Longchamps);— Machado & Bedê (2015): 294 (distributional record for Minas Gerais);— Bedê et al. (2015): 121 (distributional record for Minas Gerais);— Vilela et al. (2016): 489 (distribution in Minas Gerais State, ecological data);— Renner et al. (2017): 3 −6 (distri- bution in Rio Grande do Sul State);— Rodrigues & Roque (2017): 2 (distribution in Mato Grosso do Sul State);— Dalzochio et al. (2018): 6 (distribution in Rio Grande do Sul State).

Holotype ♂ and allotype ♀: BRAZIL, Minas Gerais State, Serra do Cipó, Municipality of Jaboticatubas , 17.i.1951, N. Santos & J. Machado leg., in MNRJ [examined] 

Specimens examined. Total: 18♂♂, 12♀♀. 1♂ (Holotype), 1♀ (Allotype), 5♂♂, 5♀♀ (Paratypes), BRAZIL, Minas Gerais State, Jaboticatubas, Serra do Cipó , 17.i.1951, N.D. Santos & J.P. Machado leg., in MNRJ  ; 9♂♂, 5♀♀, Minas Gerais State, São Gonçalo do Rio Preto, Rio Preto State Park , 25.x.2000, L.C. Bedê leg., in ABMM  ; 1♀, Minas Gerais State, Morro do Pilar , 13.ii.1965, A. Machado & Bokemann leg., in ABMM  ; 1♂, Minas Gerais State, Ouro Preto, Andorinhas Waterfall , 04.ii.1981, in ABMM  ; 1♂, Paraná State, Caxambu , 19.vii.1983, Vanedeir leg., in ABMM  ; 1♂, Minas Gerais State, Jaboticatubas, Km 121−122, 13.ii.1965, N. Santos & A. Machado leg., in FAAL  .

Additions to the original male description. Head ( Fig. 1fView FIGURE 1). Dorsally black, except for the small and roughly quadrangular blue post ocular spots merged with occipital bar; frons angulated; postfrons, antefrons, anteclypeus, postclypeus and labrum orange; back of head with a greenish stripe adjacent to each eye; remainder black.

Thorax ( Fig. 1fView FIGURE 1). Anterior lobe of prothorax blue, medial lobe black with blue spots on propleuron, posterior lobe black with blue spots laterally. Pterothorax with a thick black dorsal stripe; mesepisternum with a blue longitudinal stripe; mesepimeron black; mesinfraepisternum with 1/2 upper portion black, remainder pale; metepisternum pale green, except for a blue tinge on its posterior 1/ 4 in living specimens, remainder of pterothorax pale green/yellow in living specimens, pale in fixed specimens.

Legs ( Fig. 1fView FIGURE 1). Orange/yellow in living specimens, pale in fixed specimens; spination of the legs black.

Wings ( Fig. 1fView FIGURE 1). Hyaline with brown parallelogram pterostigma, occupying one cell; 9 Px in HW, 10 Px in FW; CuA extending for 10 cells distal to vein descending from subnodus in FW and HW; MP not reaching wing posterior margin and merged with MP&AA in FW and HW.

Abdomen ( Fig. 1fView FIGURE 1). Bright yellow/orange in living specimens, pale yellow in fixed specimens, except: S1 with a black spot on anterior dorsum, tubercle with digit like shape and a rounded apex; S6 gradually darkening from front to rear; S7 black, except for orange/pale coloration ventrally; dorsal S8−S9 with roughly triangular blue spots; S10 blue.

Genital ligula ( Fig. 4fView FIGURE 4). Segment one with a pair of roughly triangular lateral sclerotized processes, similar to lobes, in the flexure; inner fold triangular in lateral view, proximal to flexure. Segment two long with an entire straight apex, with two lateral lobes.

Anal appendages ( Figs. 3View FIGURE 3 u–x, 8g–h). Dorsal plate of the cercus broad; ventrobasal portion only 1/5 of the cercus length; paraprocts small, apex acute curved upwards.

Measurements. Total 32−35; abdomen 26−29; FW 16−20; HW 15.5−16.

Additions to the original female description. Head ( Fig. 5jView FIGURE 5). Similar to male in color pattern, except for paler colors in the non−black areas.

Thorax ( Figs. 5jView FIGURE 5, 6fView FIGURE 6, 7eView FIGURE 7, 9jView FIGURE 9). Overall thoracic coloration similar to males, except for a thin blue stripe on mesopleural suture. Posterior lobe of prothorax trilobed in dorsal view, middle lobe the larger; lateral lobes erect, middle lobe posteriorly directed in lateral view; lateral margin of prothorax slightly widens towards the base, notopleural suture a nearly straight line.

Legs ( Fig. 5jView FIGURE 5). Pale in fixed specimens; spination similar to the males.

Wings ( Fig. 5jView FIGURE 5). Hyaline with light brown parallelogram pterostigma, occupying one cell; 9 Px in HW, 10 Px in FW; CuA extending for 9 cells distal to vein descending from subnodus in FW and HW; MP not reaching wing posterior margin and merged to MP&AA in FW and HW.

Abdomen ( Figs. 2lView FIGURE 2, 5jView FIGURE 5, 9View FIGURE 9 k–l). Similar to males in coloration, except for the blue areas smaller, replaced with black. Tubercle digit-like, smaller than in males, with a rounded apex. Ovipositor surpasses the S10 for a distance shorter than this segment, not reaching the cercus level.

Measurements. Total 32−35; abdomen 26−29; FW 18; HW 16.5−18.

Diagnosis. Males and females of M. waltheri  share with M. mecistogastrum  a digit-like tubercle with a rounded apex, but are easily distinguished from the latter species by large size difference, male cercus morphology and female prothoracic morphology. Minagrion waltheri  differs from its other congeners in the following combination of characters: male cercus with a large and broad dorsal plate, thinner in all other species; a very small ventrobasal portion, occupying 1/5 of cercus length, on remaining species occupying at least 1/2 of cercus; genital ligula with lateral lobes on segment two; female posterior lobe of prothorax trilobed, middle one largest (only shared with M. mecistogastrum  ), and notopleural suture nearly a straight line (only shared with M. ribeiroi  ).

Distribution. Unlike other species of Minagrion  , M. waltheri  has a wide distribution in Brazil and is the only species in the genus recorded in four of the five Brazilian regions: North, Center–West, Southeast and South.


Museu Nacional/Universidade Federal de Rio de Janeiro














Minagrion waltheri (Selys, 1876)

Vilela, Diogo Silva, Anjos-Santos, Danielle, Koroiva, Ricardo, Cordero-Rivera, Adolfo & Guillermo-Ferreira, Rhainer 2020

Minagrion waltheri, Santos (1965a)

Dalzochio, M. S. & Renner, S. & Sganzerla, C. & Prass, G. & Ely, G. J. & Salvi, L. C. & Perico, E. 2018: 6
Renner, S. & Perico, E. & Ely, G. J. & Sahlen, G. 2017: 3
Rodrigues, M. E. & Roque, F. D. O. 2017: 2
Vilela, D. S. & Guillermo-Ferreira, R. & Del-Claro, K. 2016: 489
Machado, A. B. M. & Bede, L. C. 2015: 294
Bede, L. C. & Machado, A. B. M. & Piper, W. & Souza, M. M. 2015: 121
Hamalainen, M. 2013: 30
Cortes, L. G. & Almeida, M. C. & Pinto, N. S. & Marco-Junior, P. 2011: 136
Garrison, R. W. & von Ellenrieder, N. & Louton, J. A. 2010: 287
Lencioni, F. A. A. 2006: 173
Lencioni, F. A. A. 2004: 91
Santos, N. D. 1965: 9
Santos, N. D. 1965: 43

Telagrion serracipoense, Santos (1956)

Santos, N. 1956: 369