Heteragrion demarmelsi,

Stand-Pérez, Miguel Ángel, Bota-Sierra, Cornelio Andrés & Pérez-Gutiérrez, León Andrés, 2019, Heteragrion demarmelsi sp. nov., with taxonomic notes on Colombian Heteragrion species (Odonata: Heteragrionidae), Zootaxa 4623 (1), pp. 90-112: 99-102

publication ID

https://doi.org/10.11646/zootaxa.4623.1.6

publication LSID

lsid:zoobank.org:pub:2672F05F-81A5-413D-AB13-5CD90F9A0480

persistent identifier

http://treatment.plazi.org/id/03B6085D-6918-FFC0-FCC8-F96F6768FC65

treatment provided by

Plazi

scientific name

Heteragrion demarmelsi
status

sp. nov.

Heteragrion demarmelsi  sp. nov.

( Figs. 5View FIGURE 5 C–D, 9A–C, 14G–I, 16D–E, H–I, 18)

Holotype ♂, MPUJ _ ENT 0061372, 6 October 2005, Amazonas Department, Leticia Municipality, Monifue Amena Center, Tacana River , -4.0953, -69.9305 71m a.s.l.GoogleMaps  Allotype ♀, Same as holotype but: MPUJ _ ENT 0061371  . Paratypes: MPUJ _ENT. 15 ♂♂, 1 ♀ 6 October 2005, Amazona Department, Leticia Municipality, Monifue Amena Center, Tacana River , -4.0952, -69.9305 71m a.s.l.GoogleMaps  CEUA: 1 ♂, Amazonas Departament, Leticia Municipality, Km 11 Multi-ethnic Refuge Ticuna-Uitoto , Road to Zafire , Tacana River 80m a.s.l., Leg: A. Clavijo  .

Etymology: This species is named in honor of Dr. Jürg De Marmels, acknowledging his generous help to solve several taxonomic problems regarding Colombian odonates. Prominent entomologist, curator of the Museo del Instituto de Zoología Agrícola Francisco Fernández Yépez of the Universidad Central de Venezuela, who has con- tributed greatly to the study of Neotropical Odonata including the genus Heteragrion here considered.

Description of the holotype: Head: above yellow anteriorly, but mostly black between level of hind border of median ocellus and occipital margin, with small brown spots on vertex and between ocellus, rear of head yellow ( Fig. 5CView FIGURE 5).

Prothorax: anterior lobe black on anterior margin and yellow on posterior margin, middle lobe yellow with two lateral and central black spots, posterior lobe black with two posterolateral yellow spots ( Fig. 16HView FIGURE 16). Pterothorax: yellow with black middorsal line, black oval band on mesepisternum which does not reach posterior border, green- ish antehumeral stripe, dark brown stripe on mesepimeron, and on metepisternum, the latter darker in the middle and becomes less defined toward its extremes ( Figs. 16D, HView FIGURE 16). Legs: pale brown with the distal 0.25 dark brown, spurs on femora about same size as space between them, except for distal four, which are two times as long as space between them; eight spurs on profemora and mesofemora and 11 on metafemora, spurs on tibiae two times as long as space between them, except for distal three, which are shorter, numbering eight on protibiae and mesotibiae and ten on metatibiae; tarsi and claws dark brown. Wings: hyaline with brown tone, veins and pterostigma brown, the latter as long as 1.5–2 cells, with proximal and distal edges oblique, 20Px in FW and 18Px in HW.

Abdomen: mainly black, S1–S2 yellow laterally, S1–S3 black with a thin yellow dorsal line, S3–S7 black with a yellow basal ring, S3–S6 black with a yellow lateroventral spot on distal half, S7 dark brown on distal two thirds, S8 dark brown with yellow dorsal spot, S9–S10 dark brown ( Fig. 16DView FIGURE 16); genital ligula has the typical morphology of Heteragrion  species ( Williamson 1919). Cerci: dark brown with black spots, distance between bifurcation of medial process and tip of cerci close to one third the length of cerci ( Fig. 9AView FIGURE 9), slight ventrobasal convexity in mediodorsal view ( Fig. 9BView FIGURE 9), curved in lateral view ( Fig. 9CView FIGURE 9). Paraprocts: yellow with black tip, spinelike, about 1/4 the length of cerci ( Fig 9CView FIGURE 9).

Measurements (mm): Abdomen: 38.0, FW: 23.0, HW:24.0.

Description of the allotype: Head: mainly dark brown with black clypeus, postfrons grayish followed by black spots on each side of antennae, light brown portion between antennae and vertex, and posterior margin of head black, rear of head dark brown ( Fig. 5DView FIGURE 5).

Prothorax: anterior and middle lobe brownish, posterior lobe brown with paler spots on each side ( Fig. 16IView FIGURE 16), dorsal plate of intersternite with anterior portion more acute than posterior portion ( Fig. 14IView FIGURE 14). Pterothorax: mesepisternum pale brown with black middorsal line and brown antehumeral stripe, mesepimeron pale brown with brown stripe, mesinfraepisternum pale brown with brown spot, metepisternum pale brown with dark brown stripe, metepimeron pale yellow with short brown stripe, metainfraepisternum pale yellow with brown spot ( Figs. 16E, IView FIGURE 16). Legs: dark brown, spurs on femora about same size as space between them, except for distal three, which are two times as long as space between them on profemora and mesofemora, numbering six on profemora and mesofemora and ten on metafemora; spurs on tibiae about two times as long as space between them, except for distal three, which are shorter, eight on protibiae and mesotibiae and ten on metatibiae, tarsi and claws dark brown. Wings: hyaline with a slight brown tone, brown veins and pale brown pterostigma which covers 2.5 cells and has proximal edge oblique and distal edge vertical, 20Px in FW and 17Px in HW.

Abdomen: mainly dark brown, S1 pale brown with a slight brown dorsal spot, S2–S5 with a narrow pale brown dorsal line, S2 pale brown laterally, S3–7 with pale brown basal ring, S3–S6 with a pale brown lateroventral spot on posterior half, S9–S10 brown dorsally and pale brown ventrally ( Fig. 16EView FIGURE 16). Ovipositor: pale brown, surpassing distal border of S10, but not tip of cerci, stylus pale brown ( Fig. 14GView FIGURE 14), one ventral row of small teeth in a parallel arrangement on genital valves ( Fig. 14HView FIGURE 14), cerci yellow basally and black distally ( Fig. 14GView FIGURE 14).

Measurements (mm): Abdomen: 29.0, FW: 23.5, HW:24.0.

Variation among paratypes: males: some paratypes have a faint brown to black stripe on metepimeron, abdomen 36.0–38.0mm, FW 23.0–24.0mm, Px in FW 19–21, HW 23.0–24.0, Px in HW 17–20. Females: similar, abdomen 28–29mm, FW 23.5–24.0mm, Px in FW 20.0mm, HW 24.0mm, Px in HW 17–18.

Diagnosis: when compared with the key provided for males by Williamson (1919), the male of the new species matches H. inca  , from which it differs by its strongly curved cerci, in lateral view ( Fig. 9CView FIGURE 9). This cercus curvature in lateral view is similar to H. chlorotaeniatum De Marmels, 1989  , but the latter has, in cercus middorsal view, a pointy ventrobasal convexity (angle similar to 90°). Heteragrion bickorum Daigle, 2005  has similar thoracic color, but very different cerci, the distance between bifurcation of medial process and tip of cerci close to half the length of cerci ( Fig. 8AView FIGURE 8).