1. Nearly all Potamopyrgus antipodarum, like this one, are female, lacking a penis behind the head. From stream just above tidal limit. September 2012. Llanfihangel y Traethau, Merionydd, Wales.
  2. Nearly all Potamopyrgus antipodarum, like this one, are female, lacking a penis behind the head. From stream just above tidal limit. September 2012. Llanfihangel y Traethau, Merionydd, Wales.

Nearly all Potamopyrgus antipodarum, like this one, are female, lacking a penis behind the head. From stream just above tidal limit. September 2012. Llanfihangel y Traethau, Merionydd, Wales.

Submitted by Ian Smith on
Species
Potamopyrgus antipodarum
Photographer / copyright holder
I.F. Smith
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