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Perrona Barbarae
''Perrona'' is a genus of sea snails, marine gastropod mollusks in the family Clavatulidae. Description In this genus the spire is carinated or smooth. The whorls are not tubercular or spinose. The anal sinus can be found more or less near the suture. The smooth shell is fusiform. The spire is short with few whorls. The aperture is narrow. The siphonal canal is long. The outer lip shows a wide shallow sinus near the middle. The inner lip has a thick callosity at the hind part near the suture. The species of ''Perrona'' are smooth and solid shells with a notch in the middle of the outer lip. The hind part of the body whorl is gibbous, and the columella, as in that genus, is callous posteriorly. Species Species within the genus ''Perrona'' include: * ''Perrona aculeiformis'' (Lamarck, 1816) * † '' Perrona anwari'' Abbass H., 1977 * † '' Perrona barbarae'' (R. Hoernes & Auinger, 1891) * † '' Perrona czarnockii'' Bałuk, 2003 * † '' Perrona descendens'' (Hilber, 1879) * ... [...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] |
Perrona Barbarae
''Perrona'' is a genus of sea snails, marine gastropod mollusks in the family Clavatulidae. Description In this genus the spire is carinated or smooth. The whorls are not tubercular or spinose. The anal sinus can be found more or less near the suture. The smooth shell is fusiform. The spire is short with few whorls. The aperture is narrow. The siphonal canal is long. The outer lip shows a wide shallow sinus near the middle. The inner lip has a thick callosity at the hind part near the suture. The species of ''Perrona'' are smooth and solid shells with a notch in the middle of the outer lip. The hind part of the body whorl is gibbous, and the columella, as in that genus, is callous posteriorly. Species Species within the genus ''Perrona'' include: * ''Perrona aculeiformis'' (Lamarck, 1816) * † '' Perrona anwari'' Abbass H., 1977 * † '' Perrona barbarae'' (R. Hoernes & Auinger, 1891) * † '' Perrona czarnockii'' Bałuk, 2003 * † '' Perrona descendens'' (Hilber, 1879) * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Perrona Jessica
''Perrona jessica'' is a species of sea snail, a marine gastropod mollusk in the family Clavatulidae. Description The length of the shell attains 28 mm, its diameter 9 mm. (Original description) The shell is acuminately fusiform, shining, and very smooth. It contains 12 white and slightly bulbous whorls of which the two of the protoconch are transparent. The remainder are moderately suturally impressed, with a plicate and conspicuous revolving keel just below the suture, a plain space just below this, and then, joining on to the suture below, another carina raised and ornamented with a spiral row of small shining nodules. The body whorl is almost straight, quite smooth, shining, and milky white until the close rows of striae. Distribution This species occurs in the Atlantic Ocean off Senegal Senegal, officially the Republic of Senegal, is the westernmost country in West Africa, situated on the Atlantic Ocean coastline. It borders Mauritania to Mauritania–Se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Perrona Ilonae
''Perrona'' is a genus of sea snails, marine gastropod mollusks in the family Clavatulidae. Description In this genus the spire is carinated or smooth. The whorls are not tubercular or spinose. The anal sinus can be found more or less near the suture. The smooth shell is fusiform. The spire is short with few whorls. The aperture is narrow. The siphonal canal is long. The outer lip shows a wide shallow sinus near the middle. The inner lip has a thick callosity at the hind part near the suture. The species of ''Perrona'' are smooth and solid shells with a notch in the middle of the outer lip. The hind part of the body whorl is gibbous, and the columella, as in that genus, is callous posteriorly. Species Species within the genus ''Perrona'' include: * ''Perrona aculeiformis'' (Lamarck, 1816) * † '' Perrona anwari'' Abbass H., 1977 * † ''Perrona barbarae'' (R. Hoernes & Auinger, 1891) * † '' Perrona czarnockii'' Bałuk, 2003 * † '' Perrona descendens'' (Hilber, 1879) * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
