Erythemis simplicicollis
| Erythemis simplicicollis | ||||||||||||
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Male resting on the surface of the water |
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| Scientific name | ||||||||||||
| Erythemis simplicicollis | ||||||||||||
| ( Say , 1839) |
Erythemis simplicicollis is a species of dragonfly of the genus Erythemis from the subfamily Sympetrinae . Their distribution area extends from the center to the east of the USA and in Canada east of the Rocky Mountains . It is considered to be one of the most common species in the eastern US. The status of the species is partly controversial; it is considered by some to be a subspecies of Erythemis collocata . In the latest publications, however, it is currently again considered an independent species.
Construction of the Imago
When fully grown, the animals reach a length between 36 and 48 millimeters, of which the abdomen takes up 24 to 30 millimeters. The wings reach a size between 30 and 34 millimeters and are transparent.
male
female
The face of Erythemis simplicicollis 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 well as in the females with green spots on segments four to six. The cerci are yellow or pale gray in the young.
Young male whose abdomen is already colored.
Male that has finished changing color.
Similar species
The closest thing to Erythemis simplicicollis is, understandably, Erythemis collocata , which is sometimes also traded as a second subspecies , but this is darker in color and the males have black cerci. The similar erythemis vesiculosa is larger and has a slimmer abdomen.
Scientific descriptions
Thomas Say gave the first description in 1839 under the name Libellula simplicicollis using a male from North America . The holotype is now in the Boston Museum . As early as 1842, Jules Pierre Rambur described an erythemis simplicicollis from Philadelphia as Libellula coerulans and another specimen as Libellula maculiventris . Another description followed in 1866 by Samuel Hubbard Scudder using a male under the name Mesothemis gundlachii . This copy is also in the Boston Museum today. In 1890 William Forsell Kirby synonymized the Rambur with the Libellula simplicicollis described by Say . In 1911 Friedrich Ris recognized the synonymity of Scudder's species and downgraded the species to a subspecies. However, this downgrade is still controversial and not accepted.
Web links
- Erythemis simplicicollis inthe IUCN Red List of Threatened Species 2013.2. Listed by: Paulson, DR, 2007. Retrieved February 26, 2014.
Individual evidence
- ↑ a b c Archive link ( Memento of the original dated August 18, 2006 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. (December 28, 2006)
- ^ Martin Schorr, Martin Lindeboom, Dennis Paulson: World List of Odonata - Libellulidae. In: World List of Odonata. Archived from the original on May 14, 2008 ; Retrieved April 7, 2007 .
- ^ Garrison, von Ellenrieder , Louton: Dragonfly Genera of the New World . Johns Hopkins University Press , 2006, ISBN 0-8018-8446-2 , pp. 280f.
- ^ Henrik Steinmann - World Catalog of Odonata (Volume II Anisoptera) [p. 445], de Gruyter, 1997, ISBN 3-11-014934-6
