Smallest specimen 4mm high, largest 6mm high. Top row; males (have penes), bottom row; females (lack penes, usually mature by 4mm). All from a population with deep shell sutures at the mouth of the Dee Estuary, Cheshire.
Smallest specimen 4mm high, largest 6mm high. Top row; males (have penes), bottom row; females (lack penes, usually mature by 4mm). All from a population with deep shell sutures at the mouth of the Dee Estuary, Cheshire.
Smallest specimen 4mm high, largest 6mm high. Top row; males (have penes), bottom row; females (lack penes, usually mature by 4mm). All from a population with deep shell sutures at the mouth of the Dee Estuary, Cheshire.