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Isanda
''Isanda'' is a genus of sea snails, marine gastropod mollusks in the family Trochidae, the top snails. Description The compact shell of species in this genus has an orbicular-conoidal shape and is porcellanous and polished. The subquadrate aperture is longer than wide, The inner lip is straight, forming an angle with the outer lip. The umbilicus is open (not covered by a callous deposit) and perspective. The margin is crenulated. The multispiral operculum is corneous. The interior has a very thin nacreous layer. Species Species within the genus ''Isanda'' include: * '' Isanda coronata'' A. Adams, 1854 * '' Isanda holdsworthana'' H. Nevill & G. Nevill, 1871 * '' Isanda murrea'' (Reeve, 1848) ;Species brought into synonymy: * ''Isanda crenellifera'' A. Adams, 1862: synonym of '' Microthyca crenellifera'' (A. Adams, 1862) * ''Isanda lepida'' A. Adams, 1853: synonym of '' Isanda coronata'' A. Adams, 1854 * ''Isanda pulchella'' A. Adams, 1855: synonym of ''Ethaliella pulchella ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isanda
''Isanda'' is a genus of sea snails, marine gastropod mollusks in the family Trochidae, the top snails. Description The compact shell of species in this genus has an orbicular-conoidal shape and is porcellanous and polished. The subquadrate aperture is longer than wide, The inner lip is straight, forming an angle with the outer lip. The umbilicus is open (not covered by a callous deposit) and perspective. The margin is crenulated. The multispiral operculum is corneous. The interior has a very thin nacreous layer. Species Species within the genus ''Isanda'' include: * '' Isanda coronata'' A. Adams, 1854 * '' Isanda holdsworthana'' H. Nevill & G. Nevill, 1871 * '' Isanda murrea'' (Reeve, 1848) ;Species brought into synonymy: * ''Isanda crenellifera'' A. Adams, 1862: synonym of '' Microthyca crenellifera'' (A. Adams, 1862) * ''Isanda lepida'' A. Adams, 1853: synonym of '' Isanda coronata'' A. Adams, 1854 * ''Isanda pulchella'' A. Adams, 1855: synonym of ''Ethaliella pulchella ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isanda Coronata
''Isanda coronata'' is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.Rosenberg, G. (2012). ''Isanda coronata'' A. Adams, 1854. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=593747 on 2012-11-23 Description The size of the shell varies between 4 mm and 10 mm. The small, solid, umbilicated shell has a depressed-turbinate shape. It is polished, pinkish-white, with oblique, undulating grayish-pink longitudinal stripes. The low spire is conic. The apex is acute. The sutures are deeply channelled, bordered by a corona of tubercles or beads . The shell contains 5 whorls. The large body whorl is rounded or subangular at the circumference and convex beneath. The aperture is higher than wide, slightly oblique and quadrangular. The umbilicus is very deep, rather cylindrical, bordered by a deeply crenated white marginal rib, with a narrower beaded cingulus just outside it. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isanda Murrea
''Isanda murrea'' is a species of sea snail, a marine gastropod mollusc in the family Trochidae, the top snails.Bouchet, P. (2014). Isanda murrea (Reeve, 1848). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=732116 on 2014-07-07} Description It is a minute turbinate, porcelaneous shell, with narrow umbilicus, its margin crenated. It is smooth, polished, white neatly blotched with pale rose. (described as ''Turbo murreus'') Distribution This marine species occurs off |
Isanda Holdsworthana
''Pseudominolia musiva'' is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.Bouchet, P. (2014). Pseudominolia musiva (Gould, 1861). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=547297 on 2014-07-09 Description The height of the shell varies between 4 mm and 4½ mm, its diameter between 3½ and 4 mm. The small, thin shell is narrowly but deeply perforate. It has a conical-turreted shape. It is lusterless, whitish, mottled with greenish-brown above. Its base is densely marked with dark brownish or greenish. The spire is elevated with an acute, yellowish apex. The sutures are profound. The shell contains five whorls. The median portion is encircled by three prominent keels, the upper two visible on the spire. The oblique striae of increment are scarcely visible. The base of the shell contains a few coarse but not deep spiral sulci, carinated around the funnel-shap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ethaliella Pulchella
''Ethaliella pulchella'' is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.Bouchet, P. (2012). ''Ethaliella pulchella'' (A. Adams, 1855). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=547304 on 2012-11-23 Description The length of the shell varies between 4 mm and 10 mm. The umbilicate shell has a sublenticular shape and is obtusely angulated. It is smooth, shining, grayish-straw colored, above with little pale greenish-brown angular lines often confluent into wider streaks, below painted with white spots. The spire is a little prominent and contains five whorls. The whitish apex is a little acute. The base around the umbilicus is rather broadly, perspectively, radiately corrugated and angulate. The very oblique aperture has a subrhomboidal shape. Its throat is pearly. The outer lip has a small callus. The whitish peristome is straight and obtuse. The basal mar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus comes above species and below family (taxonomy), 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 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 ... [...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] |
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, |
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] |
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