Baetis
| Baetis | ||||||||||||
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male imago of Baetis tricaudatus |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Baetis | ||||||||||||
| Leach , 1815 |
Baetis is a genus of insects from the order of mayflies (Ephemeroptera).
Characteristics of the adults
Males have turban eyes .
Characteristics of the larva
The brownish colored body is up to 9 millimeters long, narrow and not flattened. The head is vertical compared to the body axis. The eyes are arranged on the side of the head. The antennae are a lot longer than the head is wide. The short mandibles do not protrude beyond the front edge of the head. The shape of the thorax is high and strongly arched. The legs are strong. There are no lateral spines on the last segment of the abdomen. The terminal thread has hairs on both sides, whereas the cerci only on the inside. There is no dark zone on the tail threads. The seven pairs of tracheal gills are simple and oval.
Occurrence and way of life
The species of the genus Baetis are floating forms. Their habitat are mountain streams as well as slowly flowing waters in the plain. If they are disturbed they move by jumping with blows with their abdomen. Their diet consists of detritus and thread algae. The female adults lay their eggs under water. The generation period is one year.
Systematics
In Europe there are 48 species of the genus Baetis , 17 of them also in Central Europe:
- Baetis albinatii Sartori & Thomas 1989
- Baetis alpinus (Pictet 1843)
- Baetis atrebatinus Eaton 1870
- Baetis balcanicus Muller-Liebenau & Soldan 1981
- Baetis beskidensis Sowa 1972
- Baetis bicaudatus Dodds 1923
- Baetis braaschi carpenter 1980
- Baetis buceratus Eaton 1870
- Baetis bundyae Lehmkhul 1973
- Baetis calcaratus Keffermuller 1972
- Baetis canariensis Muller-Liebenau 1971
- Baetis catharus Thomas 1986
- Baetis cyrneus Thomas & Gazagnes 1984
- Baetis digitatus Bengtsson 1912
- Baetis estrelensis Muller-Liebenau 1974
- 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 liebeauae Keffermuller 1974
- Baetis longinervis Navas 1917
- Baetis lutheri Muller-Liebenau 1967
- Baetis macani Kimmins 1957
- Baetis maurus Kimmins 1938
- Baetis melanonyx (Pictet 1843)
- Baetis meridionalis Ikonomov 1954
- Baetis muticus (Linnaeus 1758)
- Baetis navasi Muller-Liebenau 1974
- 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 pseudorhodani Muller-Liebenau 1971
- 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
supporting documents
- Herbert W. Ludwig: Animals and plants of our waters . BLV Verlagsgesellschaft, Munich 2003, ISBN 3-405-16487-7 , p. 166.
Individual evidence
Web links
- Baetis at Fauna Europaea