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Teleochilus
''Teleochilus'' is a genus of sea snails, marine gastropod mollusks in the family Raphitomidae. Description (Original description) The protoconch is large, with 1½ depressed whorls, spirally and longitudinally striated from the initial portion onwards, the spiral striae developing into well-defined sulcations as the shell passes from the brephic to the neanic stages of growth. The shell as a whole is elongate, the aperture being much longer relatively than, the spire. The whorls are slightly convex and spirally sulcated throughout, the lines of growth well-marked. The suture is typically canaliculate. The aperture shows a thin, erect, outer lip, constricted posteriorly, and broad towards the anterior. The columella Lucius Junius Moderatus Columella (; Arabic: , 4 – ) was a prominent writer on agriculture in the Roman Empire. His ' in twelve volumes has been completely preserved and forms an important source on Roman agriculture, together with the wo ... is plain, with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Teleochilus
''Teleochilus'' is a genus of sea snails, marine gastropod mollusks in the family Raphitomidae. Description (Original description) The protoconch is large, with 1½ depressed whorls, spirally and longitudinally striated from the initial portion onwards, the spiral striae developing into well-defined sulcations as the shell passes from the brephic to the neanic stages of growth. The shell as a whole is elongate, the aperture being much longer relatively than, the spire. The whorls are slightly convex and spirally sulcated throughout, the lines of growth well-marked. The suture is typically canaliculate. The aperture shows a thin, erect, outer lip, constricted posteriorly, and broad towards the anterior. The columella Lucius Junius Moderatus Columella (; Arabic: , 4 – ) was a prominent writer on agriculture in the Roman Empire. His ' in twelve volumes has been completely preserved and forms an important source on Roman agriculture, together with the wo ... is plain, with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Teleochilus Royanus
''Teleochilus royanus'' is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae. Description The length of the shell attains 16 mm, its diameter 6.5 mm. The apical whorls are minutely punctate and the succeeding whorls are obsoletely longitudinally ribbed and transversely scratched, a couple of transverse ridges being more prominent below the suture, which is slightly canaliculate. The aperture is longer than the spire. This is the most interesting species found by Roy Bell, and, until the animal is examined, its classification must remain obscure. As noted above, the only specimens I have seen were dead, but this may be the same thing as recorded by Gatliff and Gabriel from Bass Straits as Baphnohela sp., in which case live specimens may soon turn up. The genus ''Teleochilus'' was subordinated by Maurice Cossmann, who was followed by Tate, to '' Daphnobela'', a genus proposed for a Bartonian Eocene fossil, which seems to have no relationship ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Teleochilus Gracillinus
''Teleochilus gracillimus'' is an extinct species of sea snail, a marine gastropod mollusk in the family Raphitomidae. Description The length of the shell attains 25 mm, its diameter 10 mm. (Original description) The fusiform shell is thin, fragile and shining. It contains six whorls, gracefully sloping. The body whorl is longer than the spire. The whorls are finely striate lengthwise with irregular ridges of growth which become fine, close, and rounded at the lip. They are regularly and somewhat distantly grooved with rather broad, flat, shallow, conspicuously striate grooves, one of which is much broader just below the suture, which is distinctly canaliculate. The protoconch is obtuse and smooth, but granulations could have been present as the slightest wear removes them. The aperture is narrow, finely rounded at the suture. The outer lip is thin. The siphonal canal is short. The base of the columella is finely and obliquely decussate behind. Distribution Fossils of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Raphitomidae
Raphitomidae is a family of small to medium-sized sea snails, marine gastropod mollusks in the superfamily Conoidea.Bouchet P. & Rocroi J.-P. (Ed.) (2005). "Classification and nomenclator of gastropod families". ''Malacologia'' 47(1-2). . 397 pp. Bouchet, Kantor ''et al''. elevated in 2011 the subfamily Raphitominae (which at that point had been placed in the family Conidae) to the rank of family. This was based on a cladistical analysis of shell morphology, radular characteristics, anatomical characters, and a dataset of molecular sequences of three gene fragments. The family was found to be monophyletic. Description The Raphitomidae is the largest, most diverse and most variable taxon in the Conoidea, with the greatest number of species and the largest ecological range (from the tropics to the pole) and largest vertical range (intertidal to hadal depths). The shells of species in the Raphitomidae are very variable in shape (buccinoid to ovate, elongate-fusiform, or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Benthofascis Sarcinula
''Benthofascis sarcinula'' is a species of sea snail, a marine gastropod mollusk in the family Conorbidae.WoRMS (2015). Benthofascis sarcinula (Hedley, 1905). In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=433134 on 2016-07-20 These snails are predatory and venomous. They are capable of "stinging" humans, therefore live ones should be handled carefully or not at all. Description The length of an adult shell varies between 16.6 mm and 24.7 mm. The diameter varies between 7.4 mm and 10.7 mm. (Original description) The solid shell is small and has an ovate-fusiform shape. Its colour is pale yellow, with a rusty tinge at the suture. The shell contains 3½ whorls, including a protoconch of 1½ whorl. The protoconch shows fine spiral grooves, continued on the adult as broad, shallow furrows, which are broadest at the suture becoming smaller and closer anteriorly. On the body who ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Benthofascis Biconica
''Benthofascis biconica'' is a species of sea snail, a marine gastropod mollusk in the family Conorbidae.WoRMS (2015). Benthofascis biconica (Hedley, 1903). In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=433132 on 2016-07-20 These snails are predatory and venomous. They are capable of "stinging" humans, therefore live ones should be handled carefully or not at all. Description The length of an adult shell varies between 20 mm and 42 mm. The diameter of the holotype is 8 mm. (Original description) The solid shell has a biconical shape. It is slightly angled at the shoulder. The shell contains more than six whorls (the shell is too worn in order to describe the protoconch). The colour of the shell is apparently flesh-tint. Below the shoulder the shell is furrowed by numerous fine spiral grooves, crossed by arcuate growth lines. Above the furrows are broader and fewer. The apertur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lip (gastropod)
In the shell of gastropod mollusks (a snail shell), the lip is the free margin of the peristome (synonym: peritreme) or aperture (the opening) of the gastropod shell. In dextral (right-handed) shells (most snail shells are right-handed), the right side or outer side of the aperture is known as the outer lip (''labrum''). The left side of the aperture is known as the inner lip or columellar lip (''labium'') if there is a pronounced lip there. In those species where there is no pronounced lip, the part of the body whorl that adjoins the aperture is known as the parietal wall. The outer lip is usually thin and sharp in immature shells, and in some adults (e.g. the land snails ''Helicella'' and '' Bulimulus''). However, in some other land snails and in many marine species the outer lip is ''thickened'' (also called ''callused''), or ''reflected'' (turned outwards). In some other marine species it is curled inwards (''inflected''), as in the cowries such as ''Cypraea''. It can also be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Columella (gastropod)
The columella (meaning "little column") or (in older texts) pillar is a central anatomical feature of a coiled snail shell, a gastropod shell. The columella is often only clearly visible as a structure when the shell is broken, sliced in half vertically, or viewed as an X-ray image. The columella runs from the apex of the shell to the midpoint of the undersurface of the shell, or the tip of the siphonal canal in those shells which have a siphonal canal. If a snail shell is visualized as a cone of shelly material which is wrapped around a central axis, then the columella more or less coincides spatially with the central axis of the shell. In the case of shells that have an umbilicus, the columella is a hollow structure. The columella of some groups of gastropod shells can have a number of plications or folds (the columellar fold, plaits or plicae), which are usually visible when looking to the inner lip into the aperture of the shell. These folds can be wide or narrow, prominent ... [...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] |
Whorl (mollusc)
A whorl is a single, complete 360° revolution or turn in the spiral growth of a mollusc shell. A spiral configuration of the shell is found in numerous gastropods, but it is also found in shelled cephalopods including ''Nautilus'', ''Spirula'' and the large extinct subclass of cephalopods known as the ammonites. A spiral shell can be visualized as consisting of a long conical tube, the growth of which is coiled into an overall helical or planispiral shape, for reasons of both strength and compactness. The number of whorls which exist in an adult shell of a particular species depends on mathematical factors in the geometric growth, as described in D'Arcy Wentworth Thompson's classic 1917 book ''On Growth and Form'', and by David Raup. The main factor is how rapidly the conical tube expands (or flares-out) over time. When the rate of expansion is low, such that each subsequent whorl is not that much wider than the previous one, then the adult shell has numerous whorls. When the ... [...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] |
Aperture (mollusc)
The aperture is an opening in certain kinds of mollusc shells: it is the main opening of the shell, where the head-foot part of the body of the animal emerges for locomotion, feeding, etc. The term ''aperture'' is used for the main opening in gastropod shells, scaphopod shells, and also for ''Nautilus'' and ammonite shells. The word is not used to describe bivalve shells, where a natural opening between the two shell valves in the closed position is usually called a ''gape''. Scaphopod shells are tubular, and thus they have two openings: a main anterior aperture and a smaller posterior aperture. As well as the aperture, some gastropod shells have additional openings in their shells for respiration; this is the case in some Fissurellidae (keyhole limpets) where the central smaller opening at the apex of the shell is called an orifice, and in the Haliotidae (abalones) where the row of respiratory openings in the shell are also called orifices. In gastropods In some prosobranch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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