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Urosalpinx Sperata
''Urosalpinx'' is a genus (biology), genus of sea snails, marine gastropods in the subfamily Ocenebrinae of the murex snail family, Muricidae. Description The shell is elongated oval, or short fusiform, longitudinally ribbed or undulated and spirally striated. The Aperture (mollusc), aperture has a short siphonal canal. The outer Lip (gastropod), lip is dentate and lirate within. The Operculum (gastropod), operculum is somewhat like that of ''Purpura (gastropod), Purpura'', semicordate, with the nucleus at the outer edge a little below the middle. Lingual dentition nearly like that of ''Trophon'', the lateral teeth having an elongated base of attachment but the rhachidian tooth has numerous minute denticles between the principal ones, corresponding to ridges on the surface of the tooth, as in the Murices. Ova-capsules are oblong, shouldered, widest near the summit, compressed, carinated on either side peduncle short. The base of the attachment is very small. The aperture is medi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus (biology)
Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. ''Panthera leo'' (lion) and ''Panthera onca'' (jaguar) are two species within the genus '' Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants of an ancestral taxon are grouped together (i.e. phylogenetic analysis should clearly demons ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
