Two pale Lepidochitona cinerea for comparison with Leptochiton cancellatus (centre).
Girdle of Lepidochitona cinerea has a unique (in N.W. Europe) lozenge pattern (see image a 13 Leptochiton cancellatus album COMPARISON Lepidochitona cinerea. ), but sometimes indistinct, especially on whitish specimens like these which are easily confused with Leptochiton cancellatus (central specimen).
1: Faint trace of Lepidochitona cinerea girdle pattern.
2: Whitish girdle, no pattern, but rusty staining from ferrous deposits on Leptochiton cancellatus.
3: Beak on intermediate valve of Lepidochitona cinerea.
4: No beak on intermediate valve of Leptochiton cancellatus.
5: Strong growth line on Leptochiton cancellatus.
Llŷn, North Wales. March 2016

KEY ID FEATURES and similar species at: 02 Leptochiton cancellatus