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Phymorhynchus Sulciferus
''Phymorhynchus sulciferus'' is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae. Description The length of the shell attains 30 mm, its diameter 12 mm. (Original description) The fusiform shell is rather large, rather thin, translucent white with very little lustre. It has a high, regularly tapered spire of six obtusely shouldered whorls, not counting the protoconch which is broken off, and a long, nearly straight columella and a broad, straight aperture occupying about half the length of the shell. The posterior sinus is as broad as the subsutural band, shallow, slightly broken. The outer lip is thin, curving very gently to join the columella with but a very slight bending in anteriorly, not forming a well-defined siphonal canal. The columella shows a thin, narrow strip of enamel extending its entire length. The suture is inconspicuous. The subsutural band is rather broad, oblique, crossed by delicate slightly curved riblets, most distinct on the ... [...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] |
