Metaleptobasis brevicauda, Ellenrieder, 2013

Ellenrieder, Natalia Von, 2013, A revision of Metaleptobasis Calvert (Odonata: Coenagrionidae) with seven synonymies and the description of eighteen new species from South America , Zootaxa 3738 (1), pp. 1-155 : 24-26

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-6621-FFA1-D7A8-FABDE0B8FED8
treatment provided by	Felipe
scientific name	Metaleptobasis brevicauda
status	sp. nov.

Treatment

Metaleptobasis brevicauda View in CoL new species

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

Etymology. From Latin brevis (adjective), meaning 'short', and cauda (noun), meaning 'tail', in reference to the unusually short male paraproct which characterizes this species.

Types. ( all *). Holotype ♂: PERU, Huánuco Dep., Shapajilla [now Chapajilla, N to Tingo María and NE of Naranjillo], jungle {9°14'S, 75°58'W, 630 m}, 11 v 1939, F. Woytkowski leg. [ UMMZ]; 1 ♂ paratype: same as holotype but 8 v 1939 [ UMMZ]; 1 ♂ paratype: same as holotype but 14 vii 1938, [ UMMZ]; 1 ♂ paratype: same as holotype but 21 xii 1938 [ UMMZ]; 1 ♂, 1 ♀ (he) paratypes: PERU, Huánuco Dep., Tingo María, Monson Valley {8°58'S, 75°50'W, 670 m}, 16 xi 1954, E.I. Schlinger & E.S. Ross leg. [ FSCA]; 1 ♀ (an) paratype: same data but 22 v 1947, J.C. Pallister leg. [ FSCA]. GoogleMaps

Specimens examined. 5 ♂, 2 ♀.

Description of male holotype. Head. Labium and rear of head pale yellow; labrum pale yellowish blue with narrow brown line along latero-basal margins; base of mandible pale yellowish blue; gena pale blue with a small dark brown spot lateral to antefrons; anteclypeus pale yellowish blue with a pair of latero-medial brown spots; postclypeus with a brown on each antero-lateral corner; antefrons pale blue; epicranium pale bluish orange with black line over epicranial suture and black spots as depicted in Fig. 1d i View FIGURE 1 , and posterior margin of postocular region orange; eyes brown, color in life unknown; postocular lobes slightly angled. Thorax. As described for genus, with mid-dorsal dark stripe black with metallic greenish-blue reflections, about as wide as mesostigmal sinus, slightly wider than 0.33 of mesanepisterna width, with sides straight, slightly narrowing posteriorly ( Fig. 3d i View FIGURE 3 ). Pronotum anterior lobe smooth; anterior and middle lobes of pronotum separated dorso-laterally by a groove; anterior portion of propleuron with a prominent rounded tubercle (t., Fig. 5d i View FIGURE 5 ); middle lobe of pronotum smooth; pronotum posterior lobe trilobed, with medial lobe bluntly pointed and lateral lobes entire and slightly shorter than 0.50 of medial lobe length ( Fig. 4d i View FIGURE 4 ). Mesanepisternal horns with bases separated, horns well developed, about as long as two times mesostigmal plate width, thin, sub-cylindrical, gradually narrowing to tip, slightly curved medially, directed antero-laterally, forming an angle of 0° with dorsum in lateral view, with tips roundly pointed. Wings hyaline, veins reddish brown; Pt trapezoidal, with anterior side shorter than distal side, with membrane pale orange margined by yellow; 13 pnx in Fw, 12 (right) and 13 (left) in Hw. Abdomen. Postmortem background color pale yellow on S1–2, pale bluish yellow on S3–6, yellow on S7–10; S1 with a pale brown dorso-posterior spot and ventral carina of lateral tergum margined with black; S3–6 with dark reddish brown dorsum, with a basal pale incomplete ring at anterior edge interrupted by dorso-longitudinal dark line, and with a small diffuse pale transverse spot near posterior margin on each side, and dark dorsal color extended ventrally along sides of lateral terga posterior to pale transverse spot; dorsum of S7 reddish brown, gradually turning to pale orange brown posteriorly, with a yellow basal incomplete ring; dorsum of S8–10 pale orange brown with yellow basal incomplete ring; sternal medio-longitudinal carina dark brown; cercus and paraproct reddish brown with apex black. Genital lobe short, less than 0.50 of anterior hamule height, smoothly curved; posterior hamule digit-like and small, with tip not differentiated, 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 sub-rectangular with ratio maximum width/length of 0.30, narrower than opposing basal portion, with apex slightly concave lacking an ectal fold ( Fig. 8d View FIGURE 8 ). S10 medial portion of postero-dorsal margin ( Figs. 10d View FIGURE 10 ; 11d View FIGURE 11 ; 12d View FIGURE 12 ) projected posteriorly, with a small u-shaped incision, and dorsal prominence curved surrounding incision. Cercus in dorsal view ( Fig. 10d View FIGURE 10 ) subcylindrical, gradually narrowing distally, with distal third abruptly arched medially at about 90° angle, ending on single tooth directed medio-ventrally; ratio of cercus length to S10 maximum length in lateral view 1.1; ratio of cercus length to paraproct length in lateral view 1.5; paraproct in lateral view ( Fig. 12d View FIGURE 12 ) anvil-shaped, with wide base and tip widened and bent ventrally at about 90° angle, in medio-dorsal view with a sub-apical vertical ridge on medial surface ending on a single incurved pointed tooth ( Fig. 11d View FIGURE 11 ).

Dimensions. Hw 22.8; abdomen 39.3; total length 47.1.

Female paratype (collected with a male). Head. As in holotype ( Fig. 1d View FIGURE 1 ii) but labrum with branching pattern of greenish brown lines; gena bluish yellow; postclypeus brown; antefrons yellow; epicranium brown; eyes greenish-brown, color in life unknown.— Thorax. As in holotype but pronotum posterior lobe bilobed, with a medial v-shaped incision; mesanepisternal horns as long as about 1.5 times mesostigmal plate width ( Figs. 3d View FIGURE 3 ii; 4d iv; 5d ii); 13 pnx in Fw and 12 in Hw.— Abdomen. Color pattern as in holotype; posterior margin of S8 sternum smooth, lacking any denticles, spines, or processes; external valve of ovipositor yellow; ovipositor reaching tip of cercus; caudal appendages reddish brown ( Fig. 9d View FIGURE 9 ii).

Variation in paratypes. Head. As in holotype but labrum with branching pattern of dark lines in some specimens, pale areas pale blue to yellow to pale brown. Thorax. As in holotype but posterior lobe of pronotum trilobed with medial lobe pointed to rounded in males ( Figs. 4d View FIGURE 4 ii), in second female ( Figs. 4d View FIGURE 4 iii; 5 d iii) anterior lobe of pronotum with a postero-lateral tubercle, posterior lobe of pronotum trilobed with medial lobe rounded, and mesanepisternal horns as long as about 1.5 times width of mesostigmal plates; pnx Fw 11–13; pnx Hw 11–13. Abdomen. Dark areas on dorsum of abdominal segments as in holotype, but small diffuse pale transverse spot near posterior margin on each side of S2–7 present or absent in some or all segments.

Dimensions. Males (n 5, including holotype): Hw 22.1 ± 0.5 [21.5–22.8]; abdomen 39.3 ± 1.9 [37.1–41.9]; total length (n 4, one paratype missing cerci) 47.2 ± 1.9 [44.8–49.4]. Females (n 2): Hw 23.4 ± 0.4 [23.1–23.7]; abdomen (n 1, one paratype missing S8-10) 35.3; total length 43.1.

Diagnosis. The male of M. brevicauda can be distinguished from all other species by its short paraproct, shorter than 0.50 of cercus length in lateral view ( Fig. 12d View FIGURE 12 ). Both males and females share mesanepisternal horns about horizontal, forming an angle of 0°–15° with dorsum, directed antero-laterally and with bases separated ( Figs. 4d View FIGURE 4 ; 5d View FIGURE 5 ) only with M. prostrata . They can be distinguished from the latter species by the lateral margin of anterior lobe of pronotum not projected ventro-posteriorly (projected ventro-posteriorly in M. prostrata , l-v.p., Figs. 4x View FIGURE 4 ; 5x View FIGURE 5 ).

Both known females share mesanepisternal horn morphology with males, with one andromorphic, sharing also shape of pronotal posterior lobe ( Fig. 4d View FIGURE 4 ii), and one heteromorphic, differing in that charater ( Fig. 4d View FIGURE 4 iii); pronotal posterior lobe shows considerable plasticity in males as well ( Figs. 4d i View FIGURE 4 –iv).

Habitat. Unknown.

Distribution. Huánuco Dep. in Peru ( Fig. 14c).