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Shell Morphology
d Dreissena polymorpha

Photos: Lubomir Andreev

Shape
Triangular shape
Dreissena_polymorpha-2
Dorsal Surface
Rounded
Lateral Surface
Distinct angle (carina), located ventrolaterally
Ventral Surface
Flattened ventral surface; when placed on its ventral side the mussel will remain upright
Ventral Margin
Usually straight
left click for zoom!
Byssal
Large byssal groove in the middle of the ventral side
Dreissena_polymorpha-3


Valves
The two valves are bilaterally symmetrical
Colour pattern
Dark-brown colour with striped pattern; stripes are usually zigzag in shape
Maximum shell length, mm
20-50 (published data)
30 (project data)

Dreissena polymorpha
Dreissena bugensis
Dreissena presbensis
Dreissena blanci

last update:

 

This website is developed with support from the Bulgarian Science Fund, Ministry of Education, Youth and Science,
within the Project "Assessment and Management of Dreissena spp. Invasions in the Bulgarian Water Bodies",
Contract Number: DO-02-283/2008.

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