Erythemis collocata
| Erythemis collocata | ||||||||||||
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Erythemis collocata |
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| Scientific name | ||||||||||||
| Erythemis collocata | ||||||||||||
| ( Hagen , 1861) |
The Erythemis collocata is a dragonfly species of the genus Erythemis from the subfamily Sympetrinae . Their distribution area extends over the western United States and Mexico . The status of the species is controversial, and it is considered by some to be a subspecies Erythemis simplicicollis collocata . In the latest publications, however, it is currently again considered an independent species.
features
Construction of the Imago
The face of the erythemis collocata is green like the thorax , but the males turn ash blue with age. This change of color begins with the abdomen , ends at the thorax and lasts two to three weeks with a total of 17 intermediate stages. The abdomen is black before the change of color in the males, as in the females, with green spots on segments four to six. The cerci are black.
When fully grown, the animals reach a length between 39 and 42 millimeters, of which the abdomen takes up 23 to 30 millimeters. The wings reach a size between 30 and 33 millimeters and are transparent. The animal has eleven to twelve Antenodaladern and nine Postnodaladern .
Construction of the larvae
The larvae reach lengths between 15 and 17 millimeters and are colored green. Your abdomen is round in shape and has no bristles or spines.
nutrition
The larvae feed on insects that live in the water, such as mosquito and fly larvae. But they also eat small fish and tadpoles . The full-grown animals eat from termites , moths , butterflies to mosquitoes all flying insects that do not have too strong armor.
Scientific description
The first description of the species was provided by Hermann August Hagen under the name Mesothemis collocata in 1861 using a male from Texas . The holotype is now in the Louis Agassiz Museum of Comparative Zoology . While Philip Powell Calvert classified the species as a variation , Richard Anthony Muttkowski downgraded it to a subspecies in 1910. Friedrich Ris also took up this classification as a subspecies in 1911. However, later descriptions see Erythemis collocata again as an independent species.
Web links
Individual evidence
- ↑ a b Archive link ( Memento of the original from August 28, 2006 in the Internet Archive ) Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. (December 28, 2006)
- ↑ Martin Schorr, Dr. Martin Lindeboom, Dr. Dennis Paulson: World List of Odonata - Libellulidae. In: World List of Odonata. Retrieved September 16, 2012 .
- ^ Garrison, von Ellenrieder , Louton: Dragonfly Genera of the New World . The Johns Hopkins University Press, Baltimore 2006, ISBN 0-8018-8446-2 , pp. 280 f .
- ^ Hermann August Hagen : Synopsis of the Neuroptera of North America . Smithsonian institution, 1861, pp. 171 ( google.de ).
- ↑ a b Mark Lung, Stefan Sommer: Pachydiplax longipennis. Retrieved April 18, 2006 .
- ^ Henrik Steinmann: World Catalog of Odonata . Volume II (Anisoptera). de Gruyter, 1997, ISBN 3-11-014934-6 , p. 444 f .
