Summary ⁶

Geukensia demissa is a species of mussel, a marine bivalve mollusk in the family Mytilidae, the true mussels. This species is native to the Atlantic coast of North America. The common names for this species include ribbed mussel, Atlantic ribbed marsh mussel and ribbed horsemussel. However, the common name ribbed mussel is also used for the Southern Hemisphere mussel Aulacomya atra.

Description ⁷

Geukensia demissa is a member of the family Mytilidae. The surface of the shell is grooved or ribbed and oval in shape. The ribbed mussel has a narrow blunt pointed head that is attached to submerged substrata. Shells are usually glossy appearing olive-brown to brown-black with some yellow to a white on the outside and white on the interior with purplish tints.

Sources and Credits

1. (c) Femorale, some rights reserved (CC BY-NC), http://www.femorale.com/shellphotos/detail.asp?species=Geukensia%20demissa%20(Dillwyn,%201817)
2. (c) Ken-ichi Ueda, some rights reserved (CC BY), uploaded by Ken-ichi Ueda
3. (c) Alison Young, some rights reserved (CC BY-NC), uploaded by Alison Young
4. (c) Donna Pomeroy, some rights reserved (CC BY-NC), uploaded by Donna Pomeroy
5. (c) Marisa Rafter, some rights reserved (CC BY-NC), uploaded by Marisa Rafter
6. (c) Wikipedia, some rights reserved (CC BY-SA), http://en.wikipedia.org/wiki/Geukensia_demissa
7. (c) Smithsonian Marine Station at Fort Pierce, some rights reserved (CC BY-NC-SA), http://eol.org/data_objects/11526165

More Info

• iNat taxon page
• Animal Diversity Web
• Biodiversity Heritage Library
• BOLD Systems BIN search
• CalPhotos
• Global Biodiversity Information Facility (GBIF)
• Maryland Biodiversity Project
• NatureServe Explorer 2.0
• SeaLifeBase
• World Register of Marine Species

Range Map

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