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Cratidentium
''Cratidentium'' is a genus of small sea snails, marine gastropod mollusks in the family 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 ..., the top-snails.MolluscaBase eds. (2020). MolluscaBase. Cratidentium K. M. Donald & Spencer, 2016. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=876702 on 2020-09-26 Species Species within the genus ''Cratidentium'' include: * '' Cratidentium balteatum'' (Philippi, 1850) * '' Cratidentium beachportense'' (Cotton & Godfrey, 1934) * '' Cratidentium ocellinum'' (Hedley, 1911) * '' Cratidentium rottnestense'' (B. R. Wilson, 1993) * '' Cratidentium tiberianum'' (Crosse, 1863) References * Crosse, H., 1863. ''Description d'espèces nouvelles''. Journal de Conchyliologie 11: ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cratidentium Balteatum
''Cratidentium balteata'', common name the tessellated top shell, is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails. Description The height of the shell is 7 mm, its diameter 6 mm. The shell is solid for its small size, perforate, nearly exactly conical in form, and consists of 6 whorls. The upper whorls are almost planulate, while the body whorl, which is as high as all the others together, is bluntly angulated. The upper whorls are encircled around their lower borders by a white girdle articulated with vertical black lines, and which is continued upon the periphery of the body whorl. Above this girdle are 5 elevated transverse lines, and upon the base about 12 inconspicuous ones. The columella is almost vertical, rounded, with a slight tubercle in the middle, and forms an angle with the basal lip. The color of the shell is pale brown, and besides the above described girdle has large deep brown maculations below the sutur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cratidentium Ocellinum
''Cratidentium ocellinum'', common name the eyelet top shell, is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails. Description The size of the shell attains 4 mm. The small, solid, imperforate shell has a conical shape with a gradated spire with five whorls. It is prominently keeled at the periphery and again at the shoulder. Below the periphery the colour is uniform buff, above it broad, radial stripes of buff pink, alternate with white. Along the periphery are pairs of dashes of madder brown, sometimes these enclose a tinted space and have a background of opaque white, thus assuming an ocellated aspect. The apex is pink. The base of the shell shows seven fiat evenly-spaced concentric riblets. A strong, revolving cord defines the periphery and ascends the spire. The last and penultimate whorls have four spiral riblets above the periphery, the uppermost stronger and forming the angle of a subsutural shelf. The upper whorls are smoot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cratidentium Tiberianum
''Cratidentium tiberianum'' is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails. Description The size of the shell varies between 4 mm and 9 mm. The imperforate, rather thin shell has a conical shape. It is olivaceous with nacreous reflections. It is ornamented with flexuous longitudinal grayish streaks. The spire is moderately elevated. The suture is impressed. The 5½ to 6 whorls are subplanate with the body whorl obtusely angulated. The base of the shell is obsoletely striated and covered with spots of grayish-white. The aperture is oblique, quadrate, inside white and nacreous. The columella is somewhat expanded. The outer lip is simple and acute. Distribution This marine species is endemic to Australia and occurs off New South Wales, Victoria, South Australia and Tasmania ) , nickname = , image_map = Tasmania in Australia.svg , map_caption = Loc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cratidentium Beachportense
''Cratidentium beachportense'', common name the Beachport top shell, is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails. The size of the shell attains 6 mm. This marine species is endemic to Australia and occurs off South Australia and Western Australia Western Australia (commonly abbreviated as WA) is a state of Australia occupying the western percent of the land area of Australia excluding external territories. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to .... References * Cotton, B.C. & Godfrey, F.K. 1934. South Australian Shells (including descriptions of new genera and species). Part 12, Trochidae (continued). South Australian Naturalist 15(4): 106-121, pl. 1, figs 1-12 * Cotton, B.C. 1959. ''South Australian Mollusca. Archaeogastropoda''. Handbook of the Flora and Fauna of South Australia. Adelaide : South Australian Government Printer 449 pp. * Wilson, B. 1993. ''Australian Marine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cratidentium Rottnestense
''Cratidentium rottnestense'' is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails. The size of the shell attains 2 mm. This marine species is endemic to Australia and is found off the coast of Western Australia Western Australia (commonly abbreviated as WA) is a state of Australia occupying the western percent of the land area of Australia excluding external territories. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to .... References * Wilson, B. 1993. ''Australian Marine Shells. Prosobranch Gastropods''. Kallaroo, Western Australia : Odyssey Publishing Vol. 1 408 pp. rottnestensis Gastropods of Australia Gastropods described in 1911 {{Trochidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
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 c ... [...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 A land snail is any of the numerous species of snail that live on land, as opposed to the sea snails and freshwater snails. ''Land snail'' is the common name for terrestrial gastropod mollusks that have shells (those without shells are known .... Anatomy Sea snails are a very large group o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marine (ocean)
The ocean (also the sea or the world ocean) is the body of salt water that covers approximately 70.8% of the surface of Earth and contains 97% of Earth's water. An ocean can also refer to any of the large bodies of water into which the world ocean is conventionally divided."Ocean." ''Merriam-Webster.com Dictionary'', Merriam-Webster, [...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, a ... [...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 ... [...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 opi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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