Turbellarian taxonomic database

Record # 10998
Author
Title
Journal
Voute AD (1929)
De Nederlandsche beektricladen en de oorzaken van haar verspreiding. [The brook triclads of the Netherlands and the causes of their distribution]
Dissertation, Universitat Leiden. 116 p.

Abstract / Notes

Throughout central Europe, Planaria alpina is a regular inhabitant of the upper reaches of streams, Polycelis
cornuta of the middle, and Pl. gonocephala of the lower parts. Pl. alpina is the dominant form in the
streams of the high Alps and the Scandinavian mountains. In Gelderland, Holland, the author found Pl. alpina
in only three springs, while Pol. cornuta is a regular inhabitant of springs and the upper waters of brooks
of this region. PL gonocephala was not found in Gelderland. One of the Gelderland brooks (the Dunobrook)
starting in a spring and having three artificial pools in its course was particularly studied. Many PL
alpina and few few Pol. cornuta occur in the spring; the former extends into the first pool and slightly
into the second. Pol. cornuta, abundant in the 1st pool, may extend as far down as pool three. In the lower
pools other triclads met are: Pol. nigra, Dendrocoelum lacteum, and Bdellocephala punctata; while in and
near the Rhine, Pl. lugubris is encountered. 
 
 

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