Sphaerium corneum, also known as the European fingernailclam, is a very small freshwater clam

Clam

The word "clam" can be applied to freshwater mussels, and other freshwater bivalves, as well as marine bivalves.In the United States, "clam" can be used in several different ways: one, as a general term covering all bivalve molluscs...

, an aquatic

Aquatic animal

An aquatic animal is an animal, either vertebrate or invertebrate, which lives in water for most or all of its life. It may breathe air or extract its oxygen from that dissolved in water through specialised organs called gills, or directly through its skin. Natural environments and the animals that...

 bivalve mollusk in the family

Family (biology)

In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...

 Sphaeriidae

Sphaeriidae

The Sphaeriidae are a family of small to minute freshwater bivalve molluscs, in the order Veneroida. In the USA they are commonly known as the pea clams and the fingernail clams.-Genera:Genera in the family Sphaeriidae include:* Musculium...

, the fingernail clams.

Description

The shell is fairly globular and is up to 9 mm in size. The color of the shell is usually a deep yellow, tending towards brown.

Distribution

The native distribution of this species is Palearctic.

• Czech Republic - in Bohemia, in Moravia, least concern
  Least Concern
  Least Concern is an IUCN category assigned to extant taxon or lower taxa which have been evaluated but do not qualify for any other category. As such they do not qualify as threatened, Near Threatened, or Conservation Dependent...
  
   (LC)
• Germany - a common species in most of Germany, but it is in listed as endangered (gefährdet) in Thuringia
  Thuringia
  The Free State of Thuringia is a state of Germany, located in the central part of the country.It has an area of and 2.29 million inhabitants, making it the sixth smallest by area and the fifth smallest by population of Germany's sixteen states....
  
  
• Netherlands
• Sweden
• United states - nonindigenous
• and many other countries

In freshwater: standing water and slow-running rivers.

External links

• http://www.biolib.cz/en/taxon/id3012
• Pesticides Database - Chemical Toxicity Studies