Metaleptobasis selysi Santos, 1956

Ellenrieder, Natalia Von, 2013, <p> <strong> A revision of <em> Metaleptobasis </ em> Calvert (Odonata: Coenagrionidae) with seven synonymies and the description of eighteen new species from South America </ strong> </ p>, Zootaxa 3738 (1), pp. 1-155 : 68-69

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Metaleptobasis selysi Santos, 1956


Metaleptobasis selysi Santos, 1956 View in CoL

Figs. 1z View FIGURE 1 ; 2z View FIGURE 2 ; 3z View FIGURE 3 ; 4z View FIGURE 4 ; 5z View FIGURE 5 ; 8z View FIGURE 8 ; 9y View FIGURE 9 ; 10z View FIGURE 10 ; 11z View FIGURE 11 ; 12z View FIGURE 12 ; 14c

Metaleptobasis selysi Santos, 1956: 381–385 View in CoL , figs. 1–15 (description of ♂ ♀, illustrations);— Costa & Santos (1999: 4; record from Rio de Janeiro State);— Costa et al. (2000: 12; records from São Paulo State);— Lencioni (2006: 167, figs. 105A–J; mention from Brazil, reproduction of illustrations from Selys 1956);— Heckman (2008: 404, fig. 3.1.468; in key, reproduction of illustrations from Santos 1956);— Garrison & von Ellenrieder (2009: 49; mention);— Garrison et al. (2010: 284; mention).

Types. Holotype ♂: BRAZIL, Espirito Santo State, Ribeirão do Engano {20°37'S, 40°51'W, 596 m}, 9 x 1944, N. Santos & L. Travassos leg. [ UFRJ]; 1 ♀ allotype and 11 ♂ paratypes: same data [ UFRJ]; 1 ♂ paratype *: same data [ FSCA]; 1 ♂ paratype: Rio de Janeiro, Restinga de Marambaia {22°46'S, 42°56'W, 97 m}, i 1951, N.D. Santos & J. Magalhães leg. [ UFRJ]; 1 ♂ paratype: Bahia, São João de Agua Preta , Ilhéus, ix-x 1928, E. May leg. [ UFRJ]. GoogleMaps

Specimens examined. Total: 3 ♂, 3 ♀: BRAZIL, Espirito Santo State : 1 ♂ paratype *; 1 ♂ Linhares {19°25'S, 40°4'W, 16 m}, vii 1972, P. Elias leg. [ UFRJ] GoogleMaps ; 1 ♂ same but Regoneia Km 4 (20 m), 1–31 iii 1944, P. Elias leg. [ RWG]; ARGENTINA, Misiones Prov. : 1♀ Puerto Iguazú {25°34'S, 54°34'W, 161 m}, 26 x 1975, G. Jurzitza leg. [ DEI] GoogleMaps ; 1 ♀, same data but 3 xii 1976, R. Förster leg. [ DEI] GoogleMaps ; 1 ♀, same data but 1–6 iii 1943, Hayward leg. [ RMNH] GoogleMaps .

Characterization. Head. Labrum mostly pale; black on dorsum of head limited; postocular lobes slightly to markedly angled ( Fig. 1z View FIGURE 1 ). Thorax. Pronotum ( Figs. 4z View FIGURE 4 ; 5z View FIGURE 5 ) anterior lobe inflated laterally (in.); anterior and middle lobes of pronotum separated dorso-laterally by a groove; anterior area of propleuron with a low rounded tubercle (t.) and a short longitudinal crest (lo.); middle lobe of pronotum smooth; posterior lobe of pronotum trilobed, with medial lobe smoothly convex in male, smoothly convex to slightly bilobed to pointed postero-dorsally in female, and lateral lobes shorter than medial lobe, entire in male and bilobed in female, with lateral margins free and angled to rounded; bases of mesanepisternal horns joined by a low ridge to separated, horns directed anterodorsally forming an angle of about 45° with dorsum in lateral view, sub-cylindrical and slightly widening to rounded tip, in male of medium thickness, as long as about 1.5 times mesostigmal plate width, and parallel sided to slightly divergent ( Figs. 4z i View FIGURE 4 –ii), in female thin, with tip slightly compressed antero-posteriorly, as long as about 1 mesostigmal plate width, and markedly divergent ( Figs. 4z View FIGURE 4 iii–iv); mid-dorsal dark stripe narrow, as wide as about 0.33 of mesanepisterna, narrower than mesostigmal sinus, parallel sided to slightly widening posteriorly ( Fig. 3z View FIGURE 3 ); Pt sub-rectangular, with anterior and posterior sides longer than distal side, to squarish, with all sides about equal. Abdomen. Male genital lobe short, less than 0.50 of anterior hamule height, smoothly curved, digit-like and small, with at most only tip surpassing ventral margin of genital fossa in lateral view; curvature of basal segment of genital ligula marked by a slight concave depression; genital ligula distal segment sub-rectangular, apex with a shallow u- or v-shaped incision, lacking an ectal fold ( Fig. 8z View FIGURE 8 ); posterior margin of female S8 sternum smooth, lacking any denticles, spines, or processes; distal end of ovipositor reaching apex of paraproct to apex of cercus ( Fig. 9y View FIGURE 9 ); medial portion of male S10 postero-dorsal margin ( Figs. 10z View FIGURE 10 ; 11z View FIGURE 11 ; 12z View FIGURE 12 ) projected posteriorly, with a small ushaped incision, dorsal prominence curved surrounding incision; male cercus shape in dorsal view ( Fig. 10z View FIGURE 10 ) arched medially forming a distinct angle, dorso-ventrally depressed with sides sub-parallel, tip rounded in dorsal view, pointed medio-ventrally; ratio of male cercus length to S10 maximum length in lateral view 1.05–1.2; ratio of male cercus length to paraproct length in lateral view 0.70–0.87; male paraproct in lateral view ( Fig. 12z View FIGURE 12 ) slightly narrowing distally, with tip bent medio-ventrally at about 90° in dorsal view, medial surface with a marked longitudinal crest on inner surface, ending on an apical tooth directed medially.

Dimensions. Males (n 3): Hw 22.5 ± 0.4 [22.2–23]; abdomen 37 ± 1 [36–38]; total length 44.4 ± 0.9 [43.4– 44.6]. Females (n 3): Hw 22.1 ± 1 [21–23]; abdomen 34.9 ± 0.5 [34.6–34.9]; total length 42.5 ± 0.3 [42.3–42.9].

Diagnosis. The inflated lateral portion of anterior lobe of pronotum (in., Figs. 4z View FIGURE 4 ; 5z View FIGURE 5 ) allows recognizing M. selysi from all its congeners. Among the species with small digit-like male posterior hamule with at most only tip surpassing ventral margin of genital fossa in lateral view, posterior margin of female S8 sternum smooth, lacking any denticles, spines, or processes, and dorsum of head with black color not extensive, M. selysi shares only with M. knopfi and M. leniloba the combination of characters including anterior lobe of pronotum not projected postero-ventrally, middle lobe of pronotum smooth lacking any crests or projections, propleuron lacking two sub-vertical crests, and male horns directed antero-dorsally at an angle of 35°–90° with dorsum, sub-cylindrical and as long as mesostigmal plate width or longer. Metaleptobasis selysi differs from M. leniloba by lateral portions of anterior lobe of pronotum inflated (in.) and mesanepisternal horns sub-cylindrical ( Figs. 4z View FIGURE 4 ; 5z View FIGURE 5 ; lateral portions of anterior lobe not inflated and horns narrowing from base to a bluntly pointed tip in M. leniloba , Figs. 4o View FIGURE 4 ; 5o View FIGURE 5 ), male cercus with a distinct medial angle in dorsal view ( Fig. 10z View FIGURE 10 ; smoothly curved in M. leniloba , Fig. 10o View FIGURE 10 ), and tip of male paraproct curved medioventrally at a right angle ( Fig. 12y View FIGURE 12 ; curved medio-ventrally at an obtuse angle in M. leniloba , Fig. 12o View FIGURE 12 ). It differs from M. knopfi by lateral portions of anterior lobe of pronotum inflated (in., Figs. 4y View FIGURE 4 ; 5y View FIGURE 5 ; not inflated in M. knopfi , Figs. 4n View FIGURE 4 ; 5n View FIGURE 5 ), and male cercus of of uniform width with tip rounded ( Fig. 10y View FIGURE 10 ; narrowing distally in dorsal view with tip pointed in M. knopfi , Fig. 10n View FIGURE 10 ).

Known females of M. selysi are dimorphic in the development of mesanepisternal horns and shape of pronotal hind lobe.

Habitat. Flooded forest.

Distribution. E Brazil and NE Argentina ( Fig. 14c).


Florida State Collection of Arthropods, The Museum of Entomology


Senckenberg Deutsches Entomologisches Institut


National Museum of Natural History, Naturalis














Metaleptobasis selysi Santos, 1956

Ellenrieder, Natalia Von 2013

Metaleptobasis selysi

Garrison, R. W. & von Ellenrieder, N. & Louton, J. A. 2010: 284
Garrison, R. W. & von Ellenrieder, N. 2009: 49
Heckman, C. W. 2008: 404
Lencioni, F. A. A. 2006: 167
Costa, J. M. & Machado, A. B. M. & Lencioni, F. A. A. & Santos, T. C. 2000: 12
Costa, J. M. & Santos, T. C. 1999: 4
Santos, N. D. 1956: 385
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