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Mollusca
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Littorinidae
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Lacuninae
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Lacuna W. Turton 1827
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Invertebrates of the Salish Sea
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Invertebrates of the Salish Sea
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Imagem de Lacuna variegata Carpenter 1864
cc-by-nc-sa
Rosario Beach Marine Laboratory
Invertebrates of the Salish Sea
This view shows both the operculum and the open umbilicus. Note that the aperture is very close to or just over half the height of the shell.
Imagem de Lacuna W. Turton 1827
cc-by-nc-sa
Rosario Beach Marine Laboratory
Invertebrates of the Salish Sea
The species is shaped like a Littorinid but has a slitlike open umbilicus. All the specimens of this species that I found had the slit between two white, parallel longitudinal ridges as seen here.
Imagem de Lacuna variegata Carpenter 1864
cc-by-nc-sa
Rosario Beach Marine Laboratory
Invertebrates of the Salish Sea
Lacuna variegata from eelgrass in Padilla Bay. Length about 6 mm (Photo by: Dave Cowles, July 2008)
Imagem de Lacuna W. Turton 1827
cc-by-nc-sa
Rosario Beach Marine Laboratory
Invertebrates of the Salish Sea
The species has a non-calcified operculum, seen partially withdrawn inside the aperture.
Imagem de Lacuna W. Turton 1827
cc-by-nc-sa
Rosario Beach Marine Laboratory
Invertebrates of the Salish Sea
This photo shows some of the variation in coloration. The rule marks are 1 mm. All specimens from algae on Friday Harbor Marina docks.
Imagem de Lacuna W. Turton 1827
cc-by-nc-sa
Rosario Beach Marine Laboratory
Invertebrates of the Salish Sea
Lacuna vincta, 7 mm long, found clinging to algae on dock of Friday Harbor Marina. (Photo by: Dave Cowles, July 2014 )