Musculium transversum

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Musculium transversum
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Mollusca
Class: Bivalvia
Subclass: Heterodonta
Order: Sphaeriida
Family: Sphaeriidae
Genus: Musculium
Species:
M. transversum
Binomial name
Musculium transversum
(Say, 1829)

Musculium transversum is a species of freshwater bivalve from the family Sphaeriidae.

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 sexes or mating types can produce fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. While these definitions may seem adequate, when looked at more closely they represent problematic species concepts. For example, the boundaries between closely related species become unclear with hybridisation, in a species complex of hundreds of similar microspecies, and in a ring species. Also, among organisms that reproduce only asexually, the concept of a reproductive species breaks down, and each clone is potentially a microspecies.

Sphaeriidae family of molluscs

Sphaeriidae is a family of small to minute freshwater bivalve molluscs in the order Sphaeriida. In the US, they are commonly known as pea clams or fingernail clams.

Distribution and conservation status

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Conservation status indication of the chance of a species extinction, regardless of authority used

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References

  1. 2006 IUCN Red List of Threatened Species. <www.iucnredlist.org>. Cited 30 May 2007.
  2. Glöer P. & Meier-Brook C. (2003) Süsswassermollusken. DJN, pp. 134, page 82, ISBN   3-923376-02-2