06 Potamopyrgus antipodarum

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06 Potamopyrgus antipodarum

Juveniles, shell height 1.1 mm.
Smallest juveniles have slightly more acute adapical angle, and the relatively large protoconch forms a bulbous apex. They have a slight umbilical chink which is lost at larger sizes.
Freshwater pool, Dee Estuary, Cheshire. September 2011.

Imprint

Photographic guide to the identification and biology of European marine invertebrates

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