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Pseudodaphnella Sonjae
''Pseudodaphnella'' is a genus of sea snails, marine gastropod mollusks in the family Raphitomidae. In the past this generic name, ''Pseudodaphnella'', has been refused recognition by most modern writers, who have distributed its constituents among Mangilia, Clathurella, or Daphnella. Hedley, C. 1922. A revision of the Australian Turridae. Records of the Australian Museum 13(6): 213-359, pls 42-56 This genus has a morphological close relationship to ''.'' Together they form a homogeneous complex. Both are also close to the conoidean genera '' |
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] |
Cordieria
''Cordieria'' is a genus of sea snails, marine gastropod mollusks in the family Borsoniidae.Bouchet, P. (2015). Cordieria. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=432436 on 2016-03-03 This genus is considered by the French malacologist Maurice Cossmann separate from '' Borsonia'', not on the basis of the columellar plaits alone, but mostly because of the shorter siphonal canal The siphonal canal is an anatomical feature of the shells of certain groups of sea snails within the clade Neogastropoda. Some sea marine gastropods have a soft tubular anterior extension of the mantle called a siphon through which water i ... and a number of other characteristics that he enumerates. Species Species within the genus ''Borsonia'' include: * † '' Cordieria fuscoamnica'' Darragh, 2017 * '' Cordieria horrida'' Monterosato, 1884 * † '' Cordieria iberica'' Rouault, 1848 * '' Cordieria o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudodaphnella Boholensis
''Pseudodaphnella boholensis'' is a species of sea snail, a marine gastropod mollusk in the family (biology), family Raphitomidae.MolluscaBase (2019). MolluscaBase. Pseudodaphnella boholensis Fedosov & Puillandre, 2012. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=714117 on 2019-11-09 Description The length of the shell varies between 4 mm and 6.5 mm. Distribution This marine species occurs off Panglao Island, South Bohol, Philippines References External links Fedosov A. E. & Puillandre N. (2012) Phylogeny and taxonomy of the Kermia–Pseudodaphnella (Mollusca: Gastropoda: Raphitomidae) genus complex: a remarkable radiation via diversification of larval development. Systematics and Biodiversity 10(4): 447-477Gastropods.com: Pseudodaphnella boholensis Pseudodaphnella, boholensis Gastropods described in 2012 {{Raphitomidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudodaphnella Barnardi
''Pseudodaphnella barnardi'' is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.MolluscaBase (2019). MolluscaBase. Pseudodaphnella barnardi (Brazier, 1876). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=714119 on 2019-07-10 It was assigned to ''Pseudodaphnella'' by Chang, 2001. Description The length of the shell varies between 3 mm and 7 mm. (Original description) The shell is somewhat fusiformly ovate. It is longitudinally stoutly ribbed every alternate black and white and latticed with fine transverse ridges. The interstices are shallow. The shell contains 8 whorls, slightly rounded. The suture is deepand smooth. The spire is acuminated. The apex is acute, brown and granulated. The outer lip is thickened, white and black behind. The sinus is wide, above thickened and shallow. The siphonal canal is slightly recurved. Distribution This marine occurs off the Gulf of Carpent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudodaphnella Aureotincta
''Pseudodaphnella aureotincta'' is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.MolluscaBase (2019). MolluscaBase. Pseudodaphnella aureotincta (Hervier, 1897). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=1027936 on 2019-11-13 Description This is a minor form of '' Pseudodaphnella tincta'' (Reeve, 1846). The longitudinal ribs are swollen, with white ribs alternating with golden yellow ribs. The elongate-fusiform shell shows a broader, golden-yellow band in the depression near the siphonal canal The siphonal canal is an anatomical feature of the shells of certain groups of sea snails within the clade Neogastropoda. Some sea marine gastropods have a soft tubular anterior extension of the mantle called a siphon through which water i .... Hervier J. (1897 ["1896". Descriptions d'espèces nouvelles de l'Archipel de la Nouvelle-Calédonie. Journal de Conchyliologie. 44: 138-151 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudodaphnella Attenuata
''Pseudodaphnella attenuata'' is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae. Description The length of the shell attains 11 mm, its diameter 4 mm. (Original description) The lanceolate shell is rather solid and tall. Its colour is uniform yellow. There are seven whorls remaining. Sculpture:—Large deep meshes are formed on the body of the shell by the intersection of the main sculpture. The ribs are nine on the penultimate and eleven on the body whorl. They are elevated, perpendicular, alternating from whorl to whorl, twice their breadth apart, vanishing on the base and below the suture. The spirals are sharp, elevated cords, thirteen on the body whorl, three on the penultimate, overriding the ribs. On the snout the ribs only survive as nodules. Along the fasciole area the spirals are entirely different, being three or four closely packed threads. The aperture is wide . The varix is taller and broader than the ribs. There are seve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudodaphnella Alternans
''Pseudodaphnella alternans'' is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.MolluscaBase (2019). MolluscaBase. Pseudodaphnella alternans (E. A. Smith, 1882). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=596309 on 2019-11-11 Description The length of the shell attains 6 mm, its diameter 2.5 mm. The ovate shell contains probably 7 whorls (the apex is missing). The 5 remaining whorls are slightly convex and contain 12 longitudinal ribs (continuing to the base of the body whorl). The spiral lirae form small nodules when crossing the ribs (4 in the penultimate whorl, 10 in the body whorl) and are very cancellate. The aperture is very narrow and measures about 3/7 of the total length. The outer lip is incrassate with about 6 denticules within and is somewhat sinuate at the top. The siphonal canal is narrow, short and truncate. The colouring of this species is very remarkable. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australia
Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller islands. It has a total area of , making it the list of countries and dependencies by area, sixth-largest country in the world and the largest in Oceania. Australia is the world's flattest and driest inhabited continent. It is a megadiverse countries, megadiverse country, and its size gives it a wide variety of landscapes and Climate of Australia, climates including deserts of Australia, deserts in the Outback, interior and forests of Australia, tropical rainforests along the Eastern states of Australia, coast. The ancestors of Aboriginal Australians began arriving from south-east Asia 50,000 to 65,000 years ago, during the Last Glacial Period, last glacial period. By the time of British settlement, Aboriginal Australians spoke 250 distinct l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Varix (mollusc)
A varix (: varices) is an anatomical feature of the gastropod shell, shell of certain sea snails, marine (ocean), marine gastropod molluscs. Gastropods whose shells have varices are primarily families and species within the Taxonomy (biology), taxonomic groups Littorinimorpha and Neogastropoda. The varix is a thickened axial ridge, a subcylindrical protrusion, in the Exoskeleton, shell which exists in some families of marine gastropods. It is an important shell character in generic classification. A varix is located at intervals around the Whorl (mollusc), whorl, and is formed by considerable thickening of the outer lip during a resting stage in the growth of the shell. In other words, in gastropods whose shells have varices, the shells are characterised by episodic growth - the shell grows in spurts, and during the resting phase the varix forms. In many gastropod whose shells have varices, for example the Cassinae, the varix is essentially merely a thickening and swelling of ... [...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 (mollusc), 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 (mollusc), aperture of the shell. These ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Whorl (mollusc)
A whorl is a single, complete 360° revolution or turn in the spiral or whorled 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 Cone (geometry), conical tube, the growth of which is coiled into an overall Helix, 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 s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apex (mollusc)
In anatomy, an apex (adjectival form: apical) is part of the mollusc shell, shell of a mollusk. The apex is the pointed tip (the oldest part) of the shell of a gastropod, scaphopod, or cephalopod. The apex is used in end-blown conch (instrument), conches. Gastropods The word "apex" is most often used to mean the tip of the spire (mollusc), spire of the shell of a gastropod. The apex is the first-formed, and therefore the oldest, part of the shell. To be more precise, the apex would usually be where the tip of the embryonic shell or protoconch is situated, if that is still present in the adult shell (often it is lost or eroded away). Coiled gastropod shells The phrase apical whorls, or protoconch, means the whorls that constitute the embryonic shell at the apex of the shell, especially when this is clearly distinguishable from the later whorls of the shell, otherwise known as the teleoconch. Comparison of the apical part and the whole shell of ''Otukaia kiheiziebisu'': File:Cal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
