Photo of the day (18): Pseudosuccinea columella

Pseudosuccinea columella is a freshwater snail from the family Lymnaeidae and it is native to Americas. It is also well known species in Europe as a “hothouse alien”. It is inadvertently spreading in aquaria and in ponds within greenhouses. Unfortunately it has been found also in the wild in Europe.

The shell of Pseudosuccinea columella resembles a shell of a Succinea land snail. The height of the shell of this specimen is 10.5 mm.

Pseudosuccinea_columella

It can float on the water.

Pseudosuccinea_columella_2

As all other Lymnaeidae it has its eyes at the base of its non-retractile tentacles.

Pseudosuccinea_columella_3

And as all other Lymnaeidae it is exchanging gas trough a breathing pore (pneumostome). Pseudosuccinea columella can slide up its tube like pneumostome like this:

Pseudosuccinea_columella_4
Pseudosuccinea_columella_5
Pseudosuccinea_columella_6
Pseudosuccinea_columella_7

Another sequence:

Pseudosuccinea_columella_8Pseudosuccinea_columella_9Pseudosuccinea_columella_10Pseudosuccinea_columella_11Pseudosuccinea_columella_12Pseudosuccinea_columella_13Pseudosuccinea_columella_14

Ventral view with pneumostome extended:

Pseudosuccinea_columella_15
Pseudosuccinea_columella_16

References:

(in Polish) Jackiewicz M. 2000: Błotniarki Europy, Gastropoda, Pulmonata, Lymnaeidae.Wydawnictwo Kontekst, Poznań 116 pp., pages 28-29. ISBN 83-911532-4-0.

Pointier J. P., Coustau C., Rondelaud D. & Theron A. 2007. Pseudosuccinea columella (Say 1817) (Gastropoda, Lymnaeidae), snail host of Fasciola hepatica: First record for France in the wild. Parasitology Research 101(5): 1389–1392. doi:10.1007/s00436-007-0656-y