Pond snake
| Pond snake | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Stylaria lacustris | ||||||||||||
| ( Linnaeus , 1767) |
The pond snake or pond snake ( Stylaria lacustris ) is a ringworm (Annelida) belonging to the Naididae . The species, discovered as early as the 18th century, is a typical representative of the Naidinae subfamily .
features
Individual animals reach a length of 10 mm, animal chains up to 20 mm. The pond snake is transparent and brown in color. Dark pigment rings on the intestine. The species is equipped with two eyes. The long antennae at the front end is unpaired, sharply defined and movable. Pond snakes can swim well.
Multiplication
The reproduction usually takes place asexually through chain formation . Sexual reproduction also takes place in autumn. The cocoons covered in slime are found on aquatic plants.
Distribution and way of life
Northern Europe, North America and Panama. Pond snakes are found on aquatic plants and in the mud of rivers and stagnant water. They feed on algae . The saprobic index for this species is 2.3.
swell
- Herbert W. Ludwig: Animals and plants of our waters. Characteristics, biology, habitat, endangerment . BLV Verlag, ISBN 978-3-405-16487-4
Individual evidence
- ↑ Occurrences at www.gbif.net ( page no longer available , search in web archives ) Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice. (accessed December 29, 2009)
- ↑ Meyer, Detlef .: Macroscopic biological field methods for assessing the water quality of rivers: with lists of species for beginning and experienced investigators and detailed descriptions and images of the indicator organisms . 4th, unchanged. BUND, Hannover 1990, ISBN 3-9800871-4-X .
Web links
- Stylaria lacustris at www.itis.gov (accessed December 29, 2009)
- About the growth processes at the hind end and the asexual reproduction of Stylaria lacustris at www.biologiezentrum.at (accessed on December 29, 2009; PDF; 4.7 MB)