|
Leucorhynchia Tricarinata
''Leucorhynchia tricarinata'' is a species of sea snail, a marine (ocean), marine gastropod mollusk in the family (biology), family Skeneidae.Bouchet, P. (2012). ''Leucorhynchia tricarinata'' Melvill & Standen, 1896. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=595812 on 2012-09-01 Description The size of the shell varies between 2 mm and 4 mm. The white shell is much depressed and contains three whorls. The Apex (mollusc), apex has a papillary form and is sunk in the Spire (mollusc), spire. The periphery is tricarinate with the middle keel strongly, squarely built and bold and projecting further from the Whorl (mollusc), whorl than the two other keels. The spiral crenellae run round the Suture (anatomy), sutures and round the callosity of the Peristome (gastropod), peristome. This is tongue-shaped and conceals almost the Umbilicus (mollusc), umbilicus. Distribution This marine species occurs in the intert ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
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. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. However, only about 14% of these had been described by 2011. All species (except viruses) are given a two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specific name or the specific epithet (in botanical nomenclature, also sometimes i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
