Epipleoneura demarmelsi, Ellenrieder, Natalia Von & Garrison, Rosser W., 2008

Ellenrieder, Natalia Von & Garrison, Rosser W., 2008, Drepanoneura gen. nov. for Epipleoneura letitia and Protoneura peruviensis, with descriptions of eight new Protoneuridae from South America (Odonata: Protoneuridae), Zootaxa 1842, pp. 1-34 : 28-29

publication ID	https://doi.org/ 10.5281/zenodo.183222
DOI	https://doi.org/10.5281/zenodo.6231958
persistent identifier	https://treatment.plazi.org/id/038087FC-FFC0-491C-FF66-D716704EF93F
treatment provided by	Plazi
scientific name	Epipleoneura demarmelsi
status	sp. nov.

Treatment

Epipleoneura demarmelsi View in CoL sp. nov.

Figures 11 View FIGURE 11 c, 22, 32, 38

Etymology. We name this species demarmelsi (noun in the genitive case) in honor of our good friend and colleague Jürg De Marmels, in recognition of his invaluable contributions to the knowledge of New World Odonata and his continuing kind aid in our studies.

Specimens examined. Total 25 ɗ.— Holotype ɗ: Venezuela, Bolívar State, Río Churún at entrance to Salto Ángel (05°58'S, 62°31'W, 800 m), 10/ 11 viii 1990, leg. T.W. Donnelly (FSCA). Paratypes: 5 ɗ, same data as holotype (TWD); 9 ɗ, same data (RWG); 2 ɗ, Río Chaverú, 4 km W of El Paují (04°28'N, 61°37'W, 900 m), 0 6 viii 1990, leg. T.W. Donnelly (TWD); 3 ɗ, same data but leg. R.W. Garrison (RWG); 1 ɗ, same data but Santa Elena de Uairén, El Paují, streams in forest N of village, 30 vii 1991, leg. G.S. Vick (RWG); 1 ɗ, same data (GSV); 1 ɗ, Río Cinco Ranchos, 15 km E of El Paují (04°34'N, 61°31'W, 900 m), 0 7 viii 1990, leg. R.W. Garrison (RWG); 2 ɗ, same data but leg. T.W. Donnelly (TWD).

Male holotype. Head. Labium, anteclypeus, and genae pale yellow; labrum black except for narrow marginal yellow rim; base of mandibles, postclypeus, and antefrons glossy black; remainder including rear of head matte black; anterior surface of antennifer dark brown laterally, antennal pedicel and flagellum brown.

Thorax. Matte black; hind margin of prothorax evenly rounded with lateral rim becoming dark brown, prosternum light yellow with medio-ventral black spot; mesothorax with thin pale hairline along humeral suture interrupted at mesopleural fossa, mesostigmal plates flat and simple, with transverse length shorter than width of medial disc; metathorax becoming paler latero-ventrally and smudged with black along anterior half of metinfraepisternum; venter of thorax pale. Coxae pale smudged with black externally; trochanters yellow except for narrow margin of black between sutures; femora dark brown, becoming black distally; tibiae yellow with black base and apex, inner surface brown; tarsi and pretarsi yellow with black apices; 4 spurs on metafemora, 6 on metatibiae. Wings (as in Fig. 11 View FIGURE 11 c) 5.4 as long as wide; 12 Px in Fw, 10 in Hw; antenodal space 1 shorter than twice the length of 2, and about as long as 3; CuA and CuP&AA completely fused to wing margin; MP reaching wing margin at basal third of first cell posterior to vein descending from subnodus; IR2 arising at vein descending from subnodus; IR2 and RP 3 separated by a short crossvein; divergence of RP- RA (arculus) distal to Ax 2; RP 2 in Fw beginning at Px 5 and in Hw at Px 3; pt pale brown with marginal yellow hairline, in Fw as long as underlying cell with costal side shorter than posterior side, in Hw longer than underlying cell with costal side as long as posterior side.

Abdomen. Dorso-laterally matte black except for narrow yellow bands interrupted medio-dorsally by black on base of S3–7; latero-ventral portion of terga and sterna pale brown to yellow. Genital ligula distal segment markedly constricted at mid-length, with a u-shaped cleft at apex (as in Fig. 22 View FIGURES 21 – 26 a); no inner fold or internal processes; a pair of latero-posterior flap-like pedunculate projections externally at level of flexure (as in Fig. 22 View FIGURES 21 – 26 a). Dorso-posterior margin of S10 not projected posteriorly ( Figs. 32 View FIGURES 31 – 33 a–b). Cercus shorter than S10, with a dorso-apical hook and a short ventro-basal branch directed medially and adjacent to that of opposite cercus ( Figs. 32 View FIGURES 31 – 33 b–c). Paraproct as long as cercus; epiproct forming a sclerotized, decumbent plate between cerci, with a medio-dorsal blunt tooth and distal margin trilobate ( Figs. 32 View FIGURES 31 – 33 b–c).

Dimensions. Total length 36.1 mm; abdomen length 31.1 mm; Hw 18.5 mm.

Paratypes. Some paratypes are young specimens with slight metallic luster on black of thorax and head, and femora lighter brown. Variation is as follows: 3–5 spurs on metafemora and 5–7 on metatibiae, 10–11 Px in Hw, MP reaching wing margin at half to entire length of first cell posterior to vein descending from subnodus, RP 2 in Fw beginning at Px 4 or 5 (mostly at 5), and in Hw at Px 3 or 4 (mostly at 3). Female unknown.

Dimensions. (n = 10): total length 34.0– 35.9 mm [mean 35.1 mm; SD 0.6]; abdomen length 29.0– 30.6 mm [mean 30.0 mm; SD 0.6]; Hw 17.8–18.6 mm [mean 18.42 mm; SD 0.4].

Diagnosis. Epipleoneura demarmelsi is most similar in morphology to E. capilliformis . The shape of the cerci and paraprocts is essentially the same ( Figs. 31–32 View FIGURES 31 – 33 ), but in E. demarmelsi the ventral margin of the epiproct is convexly curved ( Figs. 32 View FIGURES 31 – 33 b–c), while in E. capilliformis it forms a bluntly shaped quadrangular process ( Figs. 31 View FIGURES 31 – 33 b–c).

Biology. Adults were inconspicuous. They were collected as they hovered near margins of forest rivers and streams.

Distribution. Bolívar State in Venezuela ( Fig. 38 View FIGURE 38 ).