Littorinidae - periwinkle family
[information to be added]

Maine is home to 4 species in 2 genera. If you know which species you have or are interested in learning about, click on the appropriate link from the species list below. Otherwise, to determine which genus your periwinkle belongs to, refer to the table below the species list.

   Lacuna (1 species)
      Lacuna vincta - northern lacuna
   Littorina (3 species)
      Littorina littorea - common periwinkle
      Littorina obtusata - yellow (or smooth) periwinkle
      Littorina saxatilis - rough periwinkle

	char. 1	char. 2	char. 3	char. 4	char. 5	char. 6
Lacuna vincta
Littorina

Lacuna (lacuna)
[information to be added]

Lacuna vincta (northern lacuna) - [information to be added]

Littorina (periwinkle)
[information to be added]

red font = character state unique or nearly so	char. 1	char. 2	char. 3	char. 4	char. 5	char. 6
L. littorea
L. obtusata
L. saxatilis

Littorina littorea (common periwinkle) - [information to be added]

(click on image to enlarge)

Littorina obtusata (yellow [or smooth] periwinkle) - [information to be added]

Littorina saxatilis (rough periwinkle) - [information to be added]