APHOTOMARINE

An educational resource dedicated mainly to the photography
and diversity of marine life that can be found in coastal waters
and intertidal areas of Great Britain and Ireland by David Fenwick.

A-P-H-O-T-O Wildlife Stock Image Library
Littorina saxatilis (Olivi, 1792) s.s. - Rough Periwinkle (Marine snail images)
Scroll down and rollover titles to change screen image or click on title to view image.
Rough Periwinkle
Littorina saxatilis
- variation in specimens 1

Rough Periwinkle
Littorina saxatilis
- variation in specimens 2

Rough Periwinkle
Littorina saxatilis
- variation in specimens 3

Rough Periwinkle
Littorina saxatilis
- cream coloured specimen 1

Rough Periwinkle
Littorina saxatilis
- yellow coloured specimen 1

Rough Periwinkle
Littorina saxatilis
- orange coloured specimen 1

Rough Periwinkle
Littorina saxatilis
- reddish coloured specimen 1

Rough Periwinkle
Littorina saxatilis
- dark banded specimen 1

Rough Periwinkle
Littorina saxatilis
- dark banded and spotted 1

Rough Periwinkle
Littorina saxatilis
- dark banded and spotted 2

Rough Periwinkle
Littorina saxatilis
- specimens in-situ 1

Rough Periwinkle
Littorina saxatilis
- habitat / location 1

Numerous specimens found on the uppershore reef, on rocks beside pools and in crevices, at Lesceave, Praa Sands, near Helston, Cornwall, 02.11.20.

Rough Periwinkle
Littorina saxatilis
- specimen 1 - dorsal and ventral view 1

Rough Periwinkle
Littorina saxatilis
- speciemen 1 - dorsal view 1

Rough Periwinkle
Littorina saxatilis
- specimen 1 - ventral view 1

Rough Periwinkle
Littorina saxatilis
- specimen 1 - on lichen 1

Rough Periwinkle
Littorina saxatilis
- specimen 1 - ventral view 1

Rough Periwinkle
Littorina saxatilis
- specimen 1 - ventral view 2

Rough Periwinkle
Littorina saxatilis
- specimen 1 - with Melarhaphe neritoides, Small periwinkle 1

Rough Periwinkle
Littorina saxatilis
- specimen 1 - with 1.0mm division rule 1

Rough Periwinkle
Littorina saxatilis
- specimen 1 - with 1.0mm division rule 2

Rough Periwinkle
Littorina saxatilis
- specimen 1 - brood pouch 1

Rough Periwinkle
Littorina saxatilis
- specimen 1 - brood pouch 2

Rough Periwinkle
Littorina saxatilis
- specimen 1 - embryos with 0.1mm division rule 1

Rough Periwinkle
Littorina saxatilis
- specimen 1 - length of radula under microscope 1

Rough Periwinkle
Littorina saxatilis
- specimen 2 - on lichen 1

Rough Periwinkle
Littorina saxatilis
- specimen 2 - ventral view 1

Rough Periwinkle
Littorina saxatilis
- habitat / location 1

The two specimens featured above were found in the splash zone on the lichen Hydropunctaria maura at Battery Rocks, Penzance, Cornwall, 12.09.20. Specimen one is approx. 14mm in length.

A big thank you to Ian F. Smith who advised and verified the species here. He stated that no other British marine sp. with the possible exception of Potamopyrgus antipodarum retains embryos in a brood pouch so it was definitely Littorina saxatilis sensu stricto.

Littorina saxatilis ss Rough periwinkle marine snail images
The main objective of this website is in furthering environmental awareness and education through the medium of photography. To increase awareness and access to the wildlife of the region and help
people find and identify it. Sometimes the difference between species is obvious but many species can only be determined by observing microscopic characteristics that are specific to any one species.