Zenithoptera fasciata

Zenithoptera fasciata, also known as the rainforest bluewing is a species of dragonfly native to much of the northern half of South America, as well as southern portions of Central America.[1] The species has in the past been known by additional taxonomic names, including: Libellula fasciata, Libellula americana, and Libellula violacea.[1]

Rainforest bluewing
Scientific classification
Kingdom:
Animalia
Phylum:
Arthropoda
Class:
Insecta
Order:
Odonata
Family:
Libellulidae
Subfamily:
Palpopleurinae
Genus:
Zenithoptera
Species:
Z. fasciata
Binomial name
Zenithoptera fasciata
(Linnaeus, 1758)

Taxonomy
Clearspot bluewing (Zenithoptera lanei)
Rainforest bluewing (Zenithoptera fasciata)
The closely related Z. lanei shares a similar range and appearance to Z. fasciata; Z. lanei can be distinguished however by its more iridescent wings, which are relatively unbroken by contrasting patterns.

Zenithoptera fasciata is one of four known extant species of the genus Zenithoptera, the others being Zenithoptera anceps, Zenithoptera viola, and Zenithoptera lanei ("clearspot bluewing"), with a significant overlap in range between the species. Z. fasciata and Z. lanei share a particularly close morphology, both having blue wings; lanei's wings, however, tend to be paler blue and with distinctive dots, from which the species derives its common name, near the apex, and more lateral markings on the wings than are typically seen in fasciata.

Physiology and morphology

As reflected by its common name, Z. fasciata is easily distinguished by its vibrant iridescent blue wings. The wings are almost uniform in color, but sometimes display a lighter band just near short of the apex (this band is much more universal in the closely related Z. lanei). The lateral surface of the thorax is a dark brown color with narrow, irregular yellowish bands. Two broad, light markings appear on the underside of the male thorax. A lighter band often runs from the anterior margin to the posterior margin. The abdomen is dark brown, again often with yellow narrow bands along the posterior margins of the segments.[2] The larva of the species have not been described.[1]

Ecology and behaviour

Zenithoptera fasciata live in tropical and subtropical forests and rainforests, as well as wetlands. Adults spend a majority of their time in the forest canopy, generally only coming down to lower areas for shorter periods, generally in the midday sun and often only long enough for quick breeding encounters.[1] When below the canopy, they are frequently at rest at shallow pools overgrown with low grasses and sedges,[3] and in less crowded areas of forest, where they perch on high ground or on tall slender twigs.[4] When perched, wings are typically held erect above the body, occasionally brought down suddenly to a deflected position.[4]

Range

The species is estimated to have a range exceeding 1,638,000 square kilometers, having been observed from Costa Rica south through Brazil and Peru and covering a significant portion of the Amazonian Basin.[1] The species has been recorded as a native to Bolivia, Brazil, Colombia, Costa Rica, French Guiana, Guyana, Peru, Suriname, Trinidad and Tobago, and Venezuela.[1]

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References
  1. IUCN Endangered Species Red List - Zenithoptera fasciata, retrieved 2017-07-19
  2. Heckman, Charles W. (2006). Encyclopedia of South American Aquatic Insects: Odonata - Anisoptera. Springer. p. 147.
  3. de Marmels, J. (1989). "Odonata or dragonflies from Cerro de la Neblina". Academia de las Ciencias Físicas, Matemáticas y Naturales, Caracas, Venezuela. 25: 1–78.
  4. Ris, F. (1910). Collections Zoologiques du Baron Edmond de Selys-Longchamps. Catalogue systématique et descriptif 3. Brussels: Libellulinen. pp. 245–384.

Further reading
  • Calvert, P.P. (1909). Contributions to a knowledge of the Odonata of the Neotropical region, exclusive of Mexico and Central America. Annals of the Carnegie Museum 6(3): 73-280.
  • Calvert, P.P. (1948). Odonata (dragonflies) of Kartabo, Bartica District, British Guiana. Zoologica. Scientific Contributions of the New York Zoological Society 33(2): 47-87.
  • Fraser, F.C. (1946). Notes on Amazonian Odonata in the Leeds Museum. Transactions of the Royal Entomological Society, London 97(18): 443-472.
  • Rácenis, J. (1953). Contribucion al estudio de los Odonata de Venezuela. Anales de la Universidad Central Venezuela 35: 31-96.
  • Soukup, J. (1954). Catalogo de los odonatos peruanos. Biota (Peru) 1(1): 10-20.
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