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Clanculus Rarus
''Clanculus rarus'' is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails. The description by Dufo was miserable and doesn't allow an undisputed definition. Paul Fischer (1835-1893) suggested that it should be relegated to the synonymy of ''Clanculus pharaonius ''Clanculus pharaonius'', common name the strawberry topshell, is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails. It is the type species of this genus. Description The size of the shell varies bet ...''. Description The size of the shell attains 12 mm. Distribution This marine species occurs in the Indian Ocean off the Mascarene basin. References * Herbert, D. G. 1991. ''New records of Mollusca from southern Africa and Mozambique. Part 1. (Mollusca: Gastropoda)''. Annals of the Natal Museum 32: 305–318. page(s): 308 External links Ph. Dautzenberg, Liste des Mollusques Marins de France provenant des îlesGlorieuses; ... [...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] |
Sea Snail
Sea snail is a common name for slow-moving marine gastropod molluscs, usually with visible external shells, such as whelk or abalone. They share the taxonomic class Gastropoda with slugs, which are distinguished from snails primarily by the absence of a visible shell. Definition Determining whether some gastropods should be called sea snails is not always easy. Some species that live in brackish water (such as certain neritids) can be listed as either freshwater snails or marine snails, and some species that live at or just above the high tide level (for example species in the genus '' Truncatella'') are sometimes considered to be sea snails and sometimes listed as land snails. Anatomy Sea snails are a very large group of animals and a very diverse one. Most snails that live in salt water respire using a gill or gills; a few species, though, have a lung, are intertidal, and are active only at low tide when they can move around in the air. These air-breathing species includ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastropod
The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. There are many thousands of species of sea snails and slugs, as well as freshwater snails, freshwater limpets, and land snails and slugs. The class Gastropoda contains a vast total of named species, second only to the insects in overall number. The fossil history of this class goes back to the Late Cambrian. , 721 families of gastropods are known, of which 245 are extinct and appear only in the fossil record, while 476 are currently extant with or without a fossil record. Gastropoda (previously known as univalves and sometimes spelled "Gasteropoda") are a major part of the phylum Mollusca, and are the most highly diversified class in the phylum, with 65,000 to 80,000 living snail and slug species. The anatomy, behavior, feeding, and re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mollusk
Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is estimated between 60,000 and 100,000 additional species. The proportion of undescribed species is very high. Many taxa remain poorly studied. Molluscs are the largest marine phylum, comprising about 23% of all the named marine organisms. Numerous molluscs also live in freshwater and terrestrial habitats. They are highly diverse, not just in size and anatomical structure, but also in behaviour and habitat. The phylum is typically divided into 7 or 8 taxonomic classes, of which two are entirely extinct. Cephalopod molluscs, such as squid, cuttlefish, and octopuses, are among the most neurologically advanced of all invertebrates—and either the giant squid or the colossal squid is the largest known invertebrate species. The gas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Family (biology)
Family ( la, familia, plural ') is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between order and genus. A family may be divided into subfamilies, which are intermediate ranks between the ranks of family and genus. The official family names are Latin in origin; however, popular names are often used: for example, walnut trees and hickory trees belong to the family Juglandaceae, but that family is commonly referred to as the "walnut family". What belongs to a family—or if a described family should be recognized at all—are proposed and determined by practicing taxonomists. There are no hard rules for describing or recognizing a family, but in plants, they can be characterized on the basis of both vegetative and reproductive features of plant species. Taxonomists often take different positions about descriptions, and there may be no broad consensus across the scientific community for some time. The publishing of new data and opini ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trochidae
The Trochidae, common name top-snails or top-shells, are a family of various sized sea snails, marine gastropod molluscs in the subclass Vetigastropoda. This family is commonly known as the top-snails because in many species the shell resembles a toy spinning top. Taxonomy The family Trochidae consists of the following subfamilies: * Alcyninae Williams, Donald, Spencer & Nakano, 2010 * Cantharidinae Gray, 1857 * Carinotrochinae S.-Q. Zhang, J. Zhang & S.-P. Zhang, 2020 * Chrysostomatinae Williams, Donald, Spencer & Nakano, 2010 * Fossarininae Bandel, 2009 * Halistylinae Keen, 1958 * Kaiparathininae B. A. Marshall, 1993 * Monodontinae Gray, 1857 * Stomatellinae Gray, 1840 * Trochinae Rafinesque, 1815 * Umboniinae H. Adams & A. Adams, 1854 (1840) Additionally, the following genera have not yet been placed in any subfamily: * '' Callumbonella'' Thiele, 1924 * †'' Coeloconulus'' Nützel, 2012 * '' Enida'' A. Adams, 1860 * †'' Eocalliostoma'' O. Haas, 1953 * †'' Fa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paul Henri Fischer
Paul Henri Fischer (also spelled Paul-Henri Fischer), (7 July 1835 Paris – 29 November 1893) was a French physician, zoologist and paleontologist. He is generally known as Paul Fischer. Biography He studied science and medicine, securing doctorates in both, and became assistant in paleontology at the National Museum of Natural History in Paris. He was made assistant naturalist there in 1872. Beginning in 1856, he was joint editor, with A. C. Bernardi to start with, of the ''Journal de Conchyliologie''. He served several terms as president of the Société Géologique de France Lactalis is a French multinational dairy products corporation, owned by the Besnier family and based in Laval, Mayenne, France. The company's former name was Besnier SA. Lactalis is the largest dairy products group in the world, and is the sec ... and the Société Zoologique de France. In 1880, he was a member of the commission for submarine dredging. Bibliography *''Faune conchyliologique ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clanculus Pharaonius
''Clanculus pharaonius'', common name the strawberry topshell, is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails. It is the type species of this genus. Description The size of the shell varies between 13 mm and 25 mm. The very strong and solid shell has a depressed conoidal shape with a rounded periphery and a profoundly umbilicate axis. It is densely granulate. The overall coloration of the whorls and the spire is dark strawberry red or coral red. The spire is conoidal with scarcely convex outlines. The about 6 whorls are somewhat convex and separated by well impressed sutures. The body whorl is large and deflected anteriorly. It bears 18 or 19 crowded, closely granose cinguli, of which the 1st, 3d, 5th, 7th, 9th and two upon the base are composed of alternate black and white granules. Upon the baseof the shell the granulation is finer. The base is convex, a trifle indented toward the center. The oblique aperture is su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mascarene
The Mascarene Islands (, ) or Mascarenes or Mascarenhas Archipelago is a group of islands in the Indian Ocean east of Madagascar consisting of the islands belonging to the Republic of Mauritius as well as the French department of Réunion. Their name derives from the Portuguese navigator Pedro Mascarenhas, who first visited them in April 1512. The islands share a common geologic origin in the volcanism of the Réunion hotspot beneath the Mascarene Plateau and form a distinct ecoregion with a unique flora and fauna. Geography The archipelago comprises three large islands, Mauritius, Réunion, and Rodrigues, plus a number of volcanic remnants in the tropics of the southwestern Indian Ocean, generally between 700 and 1500 kilometres east of Madagascar. The terrain includes a variety of reefs, atolls, and small islands. They present various topographical and edaphic regions. On the largest islands these gave rise to unusual biodiversity. The climate is oceanic and tropical. Mauriti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clanculus
''Clanculus'' is a genus of sea snail, marine gastropod molluscs of the family Trochidae, the top shells.Bouchet, P.; Gofas, S. (2010). Clanculus Montfort, 1810. In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2010) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=138587 on 2011-04-07 Distribution ''Clanculus'' is an old genus. Fossils found in Italy date from the Pliocene (''C. corallinus'', ''C. elevatus'', ''C. bonfittoi'', ''C. jussieui'') The distribution of this genus is worldwide, individuals of some species sometimes occur in great numbers, from the intertidal zone up to depths of 200 m. Many species can be found in Australia, New Zealand, the Indo-Pacific, Philippines, Sri Lanka, Seychelles, Japan, South Africa, Zanzibar, Indian Ocean, the Red Sea, West Africa, Angola, North Africa and Europe. Shell description These top shells are wide-conical and low spired. Their spirally ribbed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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