Littorina sitkana on:
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''Littorina sitkana'' is a
The shell of this winkle has about ten coarse spiral ribs on the last whorl, and has fine spiral microstriae in the gaps between the ribs. Occasionally this ribbing may be missing or it may be ribbed only at the base. The species with which it is most likely to be confused is '' Littorina subrotundata '' and comparison of the capsule gland of the pallial oviduct is the best way to distinguish between them.Marine Biodiversity of British Columbia
species
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...
of small sea snail, a marine gastropod mollusc in the family Littorinidae
The Littorinidae are a Taxonomy (biology), taxonomic family (biology), family of over 200 species of sea snails, marine (ocean), marine gastropod molluscs in the clade Littorinimorpha, commonly known as periwinkles and found worldwide.
Names
In ...
, the winkles. It is commonly found in the high tidal zone and the splash zone.
Description
The shell of this winkle has about ten coarse spiral ribs on the last whorl, and has fine spiral microstriae in the gaps between the ribs. Occasionally this ribbing may be missing or it may be ribbed only at the base. The species with which it is most likely to be confused is '' Littorina subrotundata '' and comparison of the capsule gland of the pallial oviduct is the best way to distinguish between them.Marine Biodiversity of British ColumbiaDistribution
The native range of ''L. sitkana'' is the coasts of Siberia, Japan and the Pacific coast of North America extending fromAlaska
Alaska ( ; russian: Аляска, Alyaska; ale, Alax̂sxax̂; ; ems, Alas'kaaq; Yup'ik: ''Alaskaq''; tli, Anáaski) is a state located in the Western United States on the northwest extremity of North America. A semi-exclave of the U.S. ...
to Oregon
Oregon () is a state in the Pacific Northwest region of the Western United States. The Columbia River delineates much of Oregon's northern boundary with Washington, while the Snake River delineates much of its eastern boundary with Idaho. T ...
.
References
Littorinidae Marine molluscs of Asia Marine molluscs of North America Molluscs of the Pacific Ocean Western North American coastal fauna Molluscs of Japan Gastropods of New Zealand Gastropods described in 1846 {{Littorinidae-stub