Juvenile G. nodosa, length 2 mm, with its mantle covered in a dense powdering of yellow. The free movable mantle edge differs from the fixed erect edge on G. castanea.
LWS, Menai Strait, Wales. August 2013.
Juvenile G. nodosa, length 2 mm, with its mantle covered in a dense powdering of yellow. The free movable mantle edge differs from the fixed erect edge on G. castanea.
LWS, Menai Strait, Wales. August 2013.