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Morddyn: 01 Theodoxus fluviatalis (Linnaeus, 1758). River Blackwater, Essex, England. 22nd June 2016. Leg. S. Taylor.
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Morddyn: 02 Theodoxus fluviatalis. 6.6mm long. Black and brown markings. Brackish loch, Orkney (sole site in Scotland). 7th May 2016. Leg. S. Taylor.
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Morddyn: 03 Theodoxus fluviatalis. 6.2mm long. Purple markings. Brackish loch, Orkney (one of two sites in Scotland). 7th May 2016. Leg. S. Taylor.