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Microstelma Lapernai
''Microstelma'' is a genus of minute sea snails, marine (ocean), marine gastropod mollusks or micromollusks in the family (biology), family Zebinidae. Description (Original description in Latin) The shell is turreted-ovate with a narrow slit and features a conical Spire (mollusc), spire. The Whorl (mollusc), whorls are adorned with prominent longitudinal folds. The Aperture (mollusc), aperture is oblong, extended anteriorly, and subtly channeled. The inner Lip (gastropod), lip is thickened and nearly straight, while the outer lip is simple. Species Species within the genus ''Microstelma'' include: * † ''Microstelma arescum'' (Woodring, 1928) * † ''Microstelma bellardii'' O. Semper, 1865 * ''Microstelma canaliculatum'' (E. A. Smith, 1890) * † ''Microstelma cepula'' (Guppy, 1866) * ''Microstelma columbella'' (Dall, 1881) * ''Microstelma daedalum'' A. Adams, 1863 * ''Microstelma gabbi'' (Dall, 1889) * ''Microstelma glabratum'' (A. Adams, 1878) * † ''Microstelma italicum'' T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. 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 taxonomy (biology), 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. Phylogeneti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
