Baetis

Male imago of Baetis tricaudatus

Baetis is an insect genus from the order of mayflies ( Ephemeroptera).

Characteristics of the adult bees

Males possess turban eyes.

Features of the larva

The brownish-colored body is up to 9 millimeters long, narrow and not flattened. The head is perpendicular compared to the body axis. The eyes are located laterally on the head. The antennae are much longer than the head is wide. Short mandibles not project beyond the front edge of the head also. The shape of the thorax is arched high and strong. The legs are strong. On the last segment of the abdomen no lateral spines are present. The terminal has thread on both sides of a hair on the other hand, Cerci only on the inner sides. A dark zone on the tail threads does not exist. The seven pairs of tracheal gills are simple and oval.

Occurrence and life

The species of the genus Baetis are floating forms. Their habitat are both mountain streams and slow moving water bodies in the plane. If they are disturbed they move through impact with the back of her body by jumping. Their diet consists of detritus and filamentous algae. The female imagos lay their eggs under water. The generation time is one year.

System

In Europe, 48 species of the genus Baetis occur, of which 17 are in Central Europe:

  • Baetis albinatii Sartori & Thomas 1989
  • Baetis alpinus ( Pictet 1843)
  • Baetis atrebatinus Eaton 1870
  • Baetis beskidensis Sowa 1972
  • Baetis bicaudatus Dodds 1923
  • Baetis braaschi Zimmermann 1980
  • Baetis buceratus Eaton 1870
  • Baetis bundyae Lehmkhul 1973
  • Baetis calcaratus Keffermuller 1972
  • Baetis catharus Thomas 1986
  • Baetis cyrneus Thomas & Gazagnes 1984
  • Baetis digitatus Bengtsson 1912
  • Baetis feles Kluge 1980
  • Baetis fuscatus (Linnaeus 1761)
  • Baetis gadeai Thomas 1999
  • Baetis gracilis Bogoescu & Tabacaru 1957
  • Baetis ingridae Thomas & Soldan 1987
  • Baetis kozufensis Ikonomov 1962
  • Baetis liebenauae Keffermuller 1974
  • Baetis longinervis Navas 1917
  • Baetis Macani Kimmins 1957
  • Baetis maurus Kimmins 1938
  • Baetis melanonyx ( Pictet 1843)
  • Baetis meridionalis Ikonomov 1954
  • Baetis muticus (Linnaeus 1758)
  • Baetis neglectus Navas 1913
  • Baetis nexus Navas 1918
  • Baetis nicolae Thomas 1983
  • Baetis niger ( Linnaeus 1761)
  • Baetis nigrescens Navas 1932
  • Baetis nubecularis Eaton 1898
  • Baetis pasquetorum Righetti & Thomas 2002
  • Baetis pavidus Grandi 1949
  • Baetis punicus Thomas, Boumaiza & Soldan 1983
  • Baetis rhodani ( Pictet 1843)
  • Baetis scambus Eaton 1870
  • Baetis strugensis ( Ikonomov 1962)
  • Baetis subalpinus Bengtsson 1917
  • Baetis tracheatus Keffermuller & Machel 1967
  • Baetis tricolor Tshernova 1928
  • Baetis vardarensis Ikonomov 1962
  • Baetis vernus Curtis 1834

Documents

  • Herbert W. Ludwig: Animals and plants of our waters. BLV Verlagsgesellschaft, Munich 2003, ISBN 3-405-16487-7, p 166
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