Enallagma deserti

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Enallagma deserti
Systematics
Subordination : Dragonfly (Zygoptera)
Superfamily : Coenagrionoidea
Family : Dragonfly (Coenagrionidae)
Subfamily : Ischnurinae
Genre : Cup maid ( Enallagma )
Type : Enallagma deserti
Scientific name
Enallagma deserti
Selys , 1871

Enallagma deserti , in German Wüsten-Becherjungfer , is a small dragonfly species from the family of the slender dragonflies (Coenagrionidae). It lives endemically in the Maghreb , north of the Sahara.

features

Enallagma deserti is very similar to the closely related common cup maiden ( Enallagma cyathigerum ), even if it is slightly larger than this with a body length of 32 to 37 mm. The species can be distinguished by the specific shape of the male upper abdominal appendages, which, however, are only visible when enlarged. Compared to Enallagma cyathigerum , the protruding tips of the abdominal appendages are significantly reduced in the lateral view in Enallagma deserti , while the tooth above is wider and shorter. In E. cyathigerum, this acts more like an inwardly curved finger. Differences in the design of the female prothorax are so subtle that they can only be distinguished by microscopic magnification. As is not uncommon in the subfamily of the Ischnurinae , the females come in different color variants. There is an androchromic form, colored like the males, as well as the numerically predominant heterochromic form, this is always greenish, never gray-brownish as with Enallagma cyathigerum .

In behavior, too, Enallagma deserti resembles the common cup maiden. The flight time is between mid-April and late September, probably with several generations per year.

distribution

Distribution of Enallagma deserti
Assured distribution Dark; likely occurrence Hell

The distribution area of Enallagma deserti extends along the African Atlantic and Mediterranean coast from Morocco to Algeria to Tunisia. It is generally not common, but it can occur locally in high density. Quiet river sections with flooding vegetation, ponds and seasonally flooded dunes are settled. The species benefits from the construction of water retention basins and small dams.

The International Union for Conservation of Nature and Natural Resources (IUCN) classifies Enallagma deserti as least concern .

Due to the great similarity of the species, Enallagma deserti is also placed as a subspecies of the common cup maiden by some editions. In the High Atlas the occurrence overlaps with that of the common mugwort, both species hybridize .

swell

literature

  • Klaas-Douwe B. Dijkstra: Field Guide to the Dragonflies of Britain and Europe. British Wildlife Publishing, Gillingham 2006, ISBN 0-953139948 .
  • Jean-Pierre Boudot, Vincent J. Kalkman et al. (Eds.): Atlas of the Odonata of the Mediterranean and North Africa. Libellula Supplement 9, Journal of the Society of German-Speaking Odonatologists eV 2009, ISSN  0723-6514 .

Individual evidence

  1. ↑ a b c d Klaas-Douwe B. Dijkstra: Field Guide to the Dragonflies of Britain and Europe , p. 102 f.
  2. ^ Jill Silsby: Dragonflies of the World . Smithsonian, Washington 2001, ISBN 1-560-98959-9 , pp. 110 f.
  3. ↑ a b Jean-Pierre Boudot, Vincent J. Kalkman et al. (Ed.): Atlas of the Odonata of the Mediterranean and North Africa , p. 60.
  4. ↑ Enallagma deserti in the IUCN Red List of Threatened Species 2010.4. Posted by: B. Samraoui, 2007. Retrieved March 1, 2011.

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