Tobias' caddisfly

The Tobias Caddis ( Hydropsyche tobiasi ) is an extinct Trichoptera. It is named after the German entomologist Wolfgang Tobias of the Senckenberg Nature Research Society, which had examined her in 1972 as the first. Scientifically it was described in 1977 by Austrian entomologist Hans Malicky based on old museum specimens, which had previously been held for Hydropsyche exocellata.

Description

The body was dark brown, the legs were brighter. The front wings were uniformly pale brownish and no drawing. The hind wings were a little brighter. The forewing length was 11 to 13 mm. The eyes were as big as Hydropsyche exocellata, so the species have been confused over again. The differences are mainly in terms of Kopulationsapparates. The aedeagus is distended bulbous H. exocellata and forewings are also pied definitely light and dark gray. The larvae of Tobias Caddis are not known.

Extinction

All documented occurrences were on terraces of the Middle Rhine between Cologne and Mainz. After Malickys research the type 1906-1914 and in the 1920s was observed more frequently. The final proof comes from the year 1938. Recent studies of W.Tobias (1999) of old collection material of W.Döhler ( 1891-1988 ) showed, however, that H.tobiasi in the 1930s also occurred on Main at Klingenberg. 1980, Hans Malicky search expeditions to the banks of the Rhine near Bonn, Bad Sackingen, Wiesbaden- Schierstein, Oppenheim and Ingelheim, but were unsuccessful. In the 20th century, the Rhine has been greatly affected by urban and industrial pollution, resulting in the disappearance of many sedges.