Biomphalaria havanensis
Encyclopedia
Biomphalaria havanensis, common name
Common name
A common name of a taxon or organism is a name in general use within a community; it is often contrasted with the scientific name for the same organism...

 the ghost rams-horn, is a species
Species
In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...

 of air-breathing freshwater snail
Freshwater snail
A freshwater snail is one kind of freshwater mollusc, the other kind being freshwater clams and mussels, i.e. freshwater bivalves. Specifically a freshwater snail is a gastropod that lives in a watery non-marine habitat. The majority of freshwater gastropods have a shell, with very few exceptions....

, 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...

 pulmonate gastropod mollusk in the family
Family
In human context, a family is a group of people affiliated by consanguinity, affinity, or co-residence. In most societies it is the principal institution for the socialization of children...

 Planorbidae, the ram's horn snails.

The shell of this species, like all planorbids is sinistral in coiling, but is carried upside down and thus appears to be dextral.

Distribution

Biomphalaria havanensis is a Neotropical species.

Distribution of Biomphalaria havanensis include:

It was found as a native transplant in:
  • pond near Snake River
    Snake River
    The Snake is a major river of the greater Pacific Northwest in the United States. At long, it is the largest tributary of the Columbia River, the largest North American river that empties into the Pacific Ocean...

     in Twin Falls County, Idaho
    Twin Falls County, Idaho
    Twin Falls County is a county in the south central part of the U.S. state of Idaho. As of the 2000 Census, the county had a population of 64,284 . The county seat and largest city is Twin Falls....

     in 1991.
  • Guadalupe River
    Guadalupe River (Texas)
    The Guadalupe River runs from Kerr County, Texas to San Antonio Bay on the Gulf of Mexico. The river is a popular destination for rafters and canoers. Larger cities along the river include New Braunfels, Kerrville, Seguin, Gonzales, Cuero, and Victoria...

    , Kerr County, Texas
    Kerr County, Texas
    Kerr County is a county located on the Edwards Plateau in the U.S. state of Texas. In 2010, its population was 49,625. Its county seat is Kerrville. Kerr County was named by Joshua D. Brown for his fellow Kentucky native, James Kerr, a congressman of the Republic of Texas...


Phylogeny

A cladogram
Cladogram
A cladogram is a diagram used in cladistics which shows ancestral relations between organisms, to represent the evolutionary tree of life. Although traditionally such cladograms were generated largely on the basis of morphological characters, DNA and RNA sequencing data and computational...

 showing phylogenic relations of species in the genus Biomphalaria:

External links

  • http://nas.er.usgs.gov/queries/FactSheet.asp?speciesID=1030
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