The class Bivalvia is comprised of freshwater and marine mollusks including clams, oysters, mussels and scallops. All bivalves are laterally compressed and posses a shell with two valves, hinged dorsally, that completely enclose the body. They are a common and diverse class with over 30,000 described species. They are distributed throughout the world's oceans and found in a variety of habitats. Some bivalves are epifaunal, attaching themselves to solid surfaces by means of a byssus or organic cementation; and others are infaunal, burying themselves in sand or other sediments. Many of the Bivalves in NEMESIS have been introduced through aquaculture imports and commercial shipping. The impacts of exotic bivalves are varied, with many having no reported impact, but some species can reach extraordinary densities and may foul industrial equipment, compete with native species, and alter natural food webs.

Species List

Anadara ovalis
Anadara satowi
Anadara transversa
Anomia chinensis
Anomia nobilis
Anomia simplex
Arctica islandica
Arcuatula senhousia
Argopecten irradians
Bankia carinata
Chama fibula
Chama macerophylla
Corbicula fluminea
Crassostrea ariakensis
Crassostrea gigas
Crassostrea sikamea
Crassostrea virginica
Cyrenoida floridana
Dreissena bugensis
Dreissena polymorpha
Gemma gemma
Geukensia demissa
Hyotissa hyotis
Ischadium recurvum
Laternula gracilis
Leukoma staminea
Limecola petalum
Lyrodus medilobatus
Lyrodus pedicellatus
Lyrodus takanoshimensis
Mercenaria mercenaria
Meretrix lusoria
Mizuhopecten yessoensis
Mya arenaria
Mya japonica
Mytella charruana
Mytilopsis leucophaeata
Mytilus edulis
Mytilus galloprovincialis
Neotrapezium liratum
Nuttallia obscurata
Ostrea angasi
Ostrea edulis
Perna perna
Perna viridis
Petricolaria pholadiformis
Pinctada margaritifera
Pisidium amnicum
Potamocorbula amurensis
Rangia cuneata
Ruditapes philippinarum
Saccostrea cucullata complex
Sphaerium corneum
Teredo bartschi
Teredo furcifera
Teredo navalis
Theora lubrica
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