<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> Author Ellenrieder, Natalia Von text Zootaxa 2013 2013-11-25 3738 1 1 155 http://dx.doi.org/10.11646/zootaxa.3738.1.1 journal article 10.11646/zootaxa.3738.1.1 1175-5326 5270552 77D1A6F6-C320-442B-AF31-83324E5EAF3B Metaleptobasis gibbosa Tennessen, 2012 Figs. 1k ; 3k ; 4k ; 5k ; 8k ; 9k ; 10k ; 11k ; 12k ; 14g Metaleptobasis gibbosa Tennessen, 2012: 88–90 , figs. 1–13 (description of ♂ ♀ , illustrations of ♂ head, pterothorax, mesanepisternal horn, pretarsal claw, S1, S10, genital ligula, and ♀ pronotum, mesanepisternum, S8, and S8–10). Types. Holotype ♂ : ECUADOR , Pastaza Prov. , forest wetlands, Los Copales , between Mera and Shell ( 1°29'30''S , 78°04'19''W , 1,070 m ), 22 ix 2005 , KJT leg. [ FSCA ]; 1 ♀ allotype *: same but 20 ix 2005 [ FSCA ]; 1 ♂ paratype *: same data as holotype but J.J. Daigle [ FSCA ]; 1 ♂ paratype *: same data as holotype but W.F. Mauffray leg. [ FSCA ]. Specimens examined. Total: 2 ♂ , 1 ♀ : 2 ♂ paratypes , 1 ♀ allotype . Characterization. Head . Labrum mostly pale; black on head dorsum extensive; postocular lobes rounded ( Fig. 1k ). Thorax . Lateral margin of pronotum anterior lobe not projected in male ( Figs. 4k i ; 5k i ), in female projected ventrally forming a denticulated ridge (d.r.) ending on a rounded tip apressed against anterior tubercle (t.) on propleuron ( Figs. 4k ii ;5k ii ); propleuron with prominent rounded tubercle on anterior area in both male and female (t.); anterior and middle lobes of pronotum separated dorso-laterally by a groove; anterior margin of middle lobe of pronotum smooth; pronotum posterior lobe entire, smoothly convex, with lateral lobes rounded in male ( Figs. 4k i ; 5k i ), and fused at an acute angle to middle lobe in female ( Figs. 4k i ; 5k i ); mesanepisternal horns in male well developed, about as long as 1.2 times mesostigmal plate width, thin, oriented antero-dorsally at an angle of 45° with dorsum, with bluntly pointed tips and bases separated, in female vestigial, about 0.20 of mesostigmal plate width; mid-dorsal dark stripe as wide as about 0.50 of mesanepisterna, with sides slightly narrowing anteriorly and posteriorly ( Fig. 3k ); Pt short rectangular, with posterior side about as long as anterior side and slightly 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; male posterior hamule laminar and large, clearly surpassing ventral margin of genital fossa in lateral view but shorter than anterior hamule, sickle-shaped, with posterior side smoothly convex, tip bluntly pointed ( Fig. 8k ); curvature of basal segment of genital ligula marked by a deep concave depression, followed by a prominent convex protuberance; genital ligula distal segment subrectangular, apex transverse with a narrow ectal fold (e.f., Fig. 8k ); posterior margin of female S8 sternum with six small denticles ( Fig. 9k ); distal end of ovipositor reaching tip of cercus; male S10 postero-dorsal margin about transverse ( Fig. 10k ), lacking a medio-posterior projection, lacking a medial incision, with dorsal prominence divided into two lateral portions (pr., Fig. 11k ); male cercus in dorsal view curved medially at apex, about straight along medial third and uniform in width; tip pointed medially gradually, ending on a single point directed medioventrally; ratio of male cercus length to S10 maximum length in lateral view 1.0–1.1; ratio of male cercus length to paraproct length in lateral view 0.65–0.80; male paraproct in lateral view ( Fig. 12k ) about straight, slightly narrowing distally; tip gradually curved medially, ending on single point directed medio-ventrally. Dimensions. Males ( n 2): Hw 23.5 ± 0.99 [22.7–24.1]; abdomen 38.75 ± 2.47 [37–40.5]; total length 46.3 ± 2.97 [44.2–48.4]. Females ( n 1): Hw 25.8; abdomen 40.6; total length 48.4. Diagnosis. Among the species with large laminar male posterior hamule clearly surpassing ventral margin of genital fossa in lateral view and with posterior margin of female S8 sternum with denticles, spines, or processes, M. gibbosa shares male posterior hamule not surpassing anterior hamule ventrally and propleuron with an anterior prominent rounded tubercle only with M. gabrielae , M. guillermoi , M. mauffrayi , and M. panguanae . Among them, it shares only with M. guillermoi and M. mauffrayi the distal segment of male genital ligula sub-rectangular and female sternum S8 with denticles or small spines (distal segment of male genital ligula pear-shaped and female S8 with strong spines or processes in the other six species). The male of M. gibbosa differs from M. guillermoi and M. mauffrayi by posterior margin of S10 lacking a medio-dorsal posterior projection and postero-medial prominence low and divided into two lateral portions (pr., Figs. 10k ; 11k ), vs. with a medio-dorsal projection (which can be folded ventrally and hidden in lateral and dorsal views depending on preservation, but is always present and visible in medio-dorsal view, Figs. 10l ; 11l, r ) and postero-medial prominence tall, as high as medio-dorsal posterior projection length, and undivided in the other two species. Female differs from those two species by having the lateral margin of the anterior lobe projected ventrally, forming a prominent denticulated ridge (d.r.) ending on a rounded tip, middle-lobe of pronotum smooth, and lateral margins of posterior lobe of pronotum fused to middle lobe ( Figs. 4k ii ; 5k ii ; vs. lateral margins of anterior lobe not projected, middle lobe of pronotum with antero-dorsal ear-like lobes (e-l.), and lateral margins of posterior lobe of pronotum free ( Figs. 4 l ii ; 5l ii , r ii ). The only known female of M. gibbosa differs from male in shape of both pronotal hind lobe and of mesanepisternal horns. Habitat. Type specimens found near a small, partially shaded seepage pool at the edge of the forest at Los Copales, with very little water. The few individuals detected perched low on stems but when disturbed flew high toward and into overhanging bushes ( Tennessen 2012 ). Distribution. Pastaza Prov. in Ecuador ( Fig. 14g ).