Metaleptobasis furcifera, Ellenrieder, 2013

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 : 37-39

publication ID

https://doi.org/ 10.11646/zootaxa.3738.1.1

publication LSID

lsid:zoobank.org:pub:77D1A6F6-C320-442B-AF31-83324E5EAF3B

persistent identifier

https://treatment.plazi.org/id/03E187ED-6612-FF9E-D7A8-F9DEE050FB03

treatment provided by

Felipe

scientific name

Metaleptobasis furcifera
status

sp. nov.

Metaleptobasis furcifera View in CoL new species

Figs. 1i View FIGURE 1 ; 3i View FIGURE 3 ; 4i View FIGURE 4 ; 5i View FIGURE 5 ; 8i View FIGURE 8 ; 9i View FIGURE 9 ; 10i View FIGURE 10 ; 11i View FIGURE 11 ; 12i View FIGURE 12 ; 14b

Etymology. From Latin furca (noun), meaning 'two-pronged fork', and fero (verb), meaning 'to bear', in reference to the resemblance of its mesanepisternal horns to a carving fork.

Types. ( all *). Holotype ♂: PERU, Loreto Dep., Iquitos {3°46'S, 73°15'W, 106 m), iii 1936, G.G. Klug leg. [ BMNH]; 22 ♂, 28 ♀ paratypes: same data [ BMNH]; 1 ♂ paratype: same data but ii 1936, G.G. Klug leg. [ BMNH]; 21 ♂, 12 ♀ paratypes: same data but iv 1936, G.G. Klug leg. [ BMNH]; 1 ♂ paratype: PERU, Loreto Dep., San Juan de Miraflores, Río Amazonas , near Iquitos {3°46'34''S, 73°16'53''W, 107 m}, viii 1939, J. Schunke leg. [ FSCA]; 1 ♂ paratype: PERU, San Martín Dep., Río Seco {5°53'46''S, 77°14'51''W, 774 m}, xii 1934, G.G. Klug leg. [ BMNH]; 1 ♀ paratype: PERU, Huánuco Dep.: 61 mi E of Tingo María {9°17'S, 75°10'W, 220 m}, 5 x 1954, E.I. Schlinger & E.S. Ross leg. [ CAS]; 1 ♂ paratype, PERU, Huánuco Dep., Yuyapichis, Biological Station Panguana (9°37'S, 74°56'W, 220 m), 21 ix/ 4 x 2004, Schönitzer, Segerer, Kothe, Breitsameter, Conle & Hennemann leg. [ ZSM, in ETOH]. GoogleMaps

Specimens examined. 48 ♂, 41 ♀.

Description of male holotype. Head. Labium and rear of head pale yellow; base of mandible pale yellow with a dark brown spot; labrum pale brown with dark brown line along latero-basal margin and a medio-basal dark brown spot; gena pale blue with a dark brown spot lateral to antefrons; basal half of anteclypeus pale blue, distal half brown; postclypeus basal half black, distal half brown; antefrons pale blue; postfrons and epicranium mostly black ( Fig. 1i i View FIGURE 1 ) with pale areas orange; eyes brown, color in life unknown; postocular lobes markedly angled. Thorax. Color as described for genus, with mid-dorsal dark stripe black with metallic greenish-blue reflections, wider than inter-laminal sinus at anterior end, as wide as 0.50 of mesepisterna width, about parallel sided, narrowing between mesanepisternal horns and extending along sides of antealar sinus (as in Fig. 3i i View FIGURE 3 ). Anterior lobe of pronotum ( Figs. 4i i View FIGURE 4 ; 5i i View FIGURE 5 ) smooth; anterior and middle lobes of pronotum separated dorso-laterally by a groove; anterior area of propleuron with a low rounded tubercle (t.); a lateral c-shaped crest (c.) postero-dorsal to tubercle on propleuron; anterior margin of middle lobe of pronotum smooth; pronotum posterior lobe trilobed, with medial lobe with a medial point and lateral lobes with lateral margins rounded on right side, slightly angled on left side ( Fig. 4i i View FIGURE 4 ). Mesanepisternal horns well developed, forming an angle of 45° with dorsum in lateral view, slightly longer than twice mesostigmal plate width, thin and parallel sided, diverging only at pointed and laterally directed tip, with bases adjacent. Wings hyaline, veins reddish brown; Pt sub-rectangular, with anterior and posterior sides longer than distal side, with membrane pale reddish brown margined by pale yellow; 13 (right) and 12 (left) pnx in Fw, 11 in Hw. Abdomen. Postmortem background color pale yellow on S1–6, pale orange on S7– 10; S1 with a reddish brown dorso-posterior spot and ventral carina of lateral tergum margined with black; S2 and S7 with dark reddish-brown dorsum, S3–6 with black dorsum, with a basal pale incomplete ring, on S2–7 interrupted at anterior edge by dorso-longitudinal dark line, and with a small diffuse pale transverse spot near posterior margin on each side, on S3–6 dark dorsal color posterior to pale transverse spot extended ventrally along sides of lateral terga; dorsum of S8–10 orange; cercus and paraproct orange with apex black. Genital lobe ( Fig. 8i i View FIGURE 8 ) short, less than 0.50 of anterior hamule height, smoothly curved; posterior hamule digit-like and small, shortly 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 pear-shaped, with ratio maximum width/length of 0.63, with apex transverse lacking an ectal fold, at rest not surrounding sides of basal segment ( Fig. 8i i View FIGURE 8 ). Medial portion of male S10 postero-dorsal margin ( Fig. 10i i View FIGURE 10 ; 12i i View FIGURE 12 ) projected posteriorly, with a small medial u-shaped incision, with thickened sides as wide as incision, flat, lacking a dorsal prominence. Cercus in dorsal view ( Fig. 10i i View FIGURE 10 ) with medial margin about straight, sub-cylindrical along basal 0.75, gradually narrowing distally, distal 0.25 bent ventrally at 90°, ending on single incurved tooth directed ventrally; ratio of cercus length to S10 maximum length in lateral view 1; ratio of cercus length to paraproct length in lateral view 0.57; paraproct wide at base, narrowed medially, with distal third slightly wider than medial third in lateral view ( Fig. 12i i View FIGURE 12 ), base sub-cylindrical, distal 0.66 compressed and medially concave, with a marked longitudinal crest on inner surface with a tooth on basal end and a tooth on distal end, directed medially ( Fig. 10i i View FIGURE 10 ).

Dimensions. Hw 21.4; abdomen 37.6; total length 44.4.

Female paratype (collected at the type locality). Head. As in holotype ( Fig. 1i View FIGURE 1 ii) but pale areas on labrum orange, yellow on gena and antefrons.— Thorax. As in holotype but pronotum posterior lobe with a medial ushaped incision ( Fig. 4i v View FIGURE 4 ); mesanepisternal horns diverging, as long as about twice mesostigmal plate width, with tip bluntly pointed; 13 pnx in Fw, 12 in Hw.— Abdomen. Color pattern as in holotype but ventral carina of lateral tergum S1 margined with black; medio-longitudinal carinae on sterna S2–8 dark brown; basal half of dorsum of S8 brown; posterior margin of S8 sternum smooth, lacking any denticles, spines, or processes (as in Fig. 9i View FIGURE 9 ); ovipositor orange with dark reddish brown stylus, tip of ovipositor reaching level of tip of cercus; appendages orange.

Variation in paratypes. Head. As in holotype but labrum with branching pattern of dark lines in some specimens; pale areas of clypeus and frons pale blue to pale yellow or pale brown. Thorax. As in holotype but medial lobe of pronotum posterior lobe pointed to smoothly convex in males ( Figs. 4i i View FIGURE 4 –ii), with a u or v-shaped medial incision in females, and sides of incision variously oriented, from directed posteriorly to dorsally, apressed to diverging at tips ( Figs. 4i View FIGURE 4 iii–vi); mesanepisternal horns as long as about two to three times mesostigmal plate width, forming an angle of 35°–45° with dorsum ( Fig. 5i View FIGURE 5 ), parallel sided with tips divergent in males, diverging from base in females; Pt membrane from pale yellow with pale brown center to entirely reddish brown; pnx Fw 11– 14; pnx Hw 11–12. Abdomen. Black areas on dorsum of abdominal segments as in holotype to dark reddish brown; dorsum of S8–10 orange to dark reddish brown in various extensions; medio-longitudinal carina on sterna yellow to pale brown to black; ratio of male cercus length to S10 maximum length in lateral view 0.95–1.10; ratio of male cercus length to paraproct length in lateral view 0.55–0.65; tip of male cercus curved ventrally at an angle of 90°– 95° ( Fig. 12i View FIGURE 12 ); ovipositor reaching level of apex of paraproct to apex of cercus.

Dimensions. Males (n 10, excluding holotype): Hw 21.7 ± 0.3 [21.3–22.1]; abdomen 36.3 ± 0.9 [35.2–37.7]; total length 43.5 ± 1 [42.5–45]. Females (n 10): Hw 22.6 ± 0.6 [21.5–23.5]; abdomen 35.4 ± 1 [34.7–36.6]; total length 42.2 ± 1.2 [40–44.3].

Diagnosis. Metaleptobasis furcifera shares only with M. brysonima and M. paludicola the following combination of characters: small digit-like male posterior hamule, smooth female posterior margin of S8 sternum lacking any denticles, spines, or processes, black on head dorsum covering about half to most of dorsal surface, labrum mostly pale, anterior margin of middle lobe of pronotum smooth, anterior portion of propleuron with a low rounded tubercle, and mesanepisternal horns sub-cylindrical. It differs from M. paludicola by female pronotum unlobed to slightly trilobed always with a medial incision ( Figs. 4i View FIGURE 4 iii–vi; trilobed with smoothly convex medial lobe in M. paludicola , Figs. 4u v View FIGURE 4 –vi), dark mid-dorsal pterothoracic stripe about as wide as 0.50 of mesanepisterna width ( Fig. 3i View FIGURE 3 ; about as wide as 0.33 of mesanepisterna width in M. paludicola , Fig. 3u View FIGURE 3 ), and male S 10 in lateral view flat, lacking a medial prominence on postero-dorsal margin ( Figs. 10i View FIGURE 10 ; 11i View FIGURE 11 ; 12i View FIGURE 12 ; with a well developed medial prominence on postero-dorsal margin in M. paludicola , Figs. 10u View FIGURE 10 ; 11u View FIGURE 11 ; 12u View FIGURE 12 ). It differs from M. brysonima by apex of male genital ligula distal segment transverse and not extending over lateral sides of basal segment at rest ( Fig. 8i View FIGURE 8 ; apex concave, surrounding lateral sides of basal segment at rest in M. brysonima , Figs. 7a i View FIGURE 7 ; 8e View FIGURE 8 ), and tip of male paraproct with a marked longitudinal crest on inner surface with two teeth pointed inwards (te.), one on its basal end and one on its apical end ( Figs. 10i View FIGURE 10 ; 11i View FIGURE 11 ; with a faint low longitudinal crest on inner surface ending on a single apical tooth (s.t.) pointed inwards in M. brysonima , Figs. 10e View FIGURE 10 ; 11e View FIGURE 11 ). Female mesanepisternal horns are relatively longer, two to three times as long as mesostigmal plate width, and slightly thinner in M. furcifera ( Fig. 5i View FIGURE 5 iii; in M. brysonima 1.5–2 times as long as mesostigmal plate width and slightly thicker, Figs. 5e View FIGURE 5 iii–xi), but I could find no any other structural or color characters to diagnose between females. The two species seem to be allopatric, with M. brysonima widely distributed from Trinidad, Venezuela, Guyana, N Brazil to SE Peru and N Bolivia, and M. furcifera restricted to N Peru ( Fig. 14b).

All known females of M. furcifera are dimorphic in the morphology of posterior lobe of pronotum and mesanepisternal horns and both characters show a considerable degree of plasticity ( Figs. 4i View FIGURE 4 iii–vi).

Habitat. Forest near rivers.

Distribution. N Peru ( Fig. 14b).

FSCA

Florida State Collection of Arthropods, The Museum of Entomology

CAS

California Academy of Sciences

ZSM

Bavarian State Collection of Zoology

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