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Lusitanops Gigasei
''Lusitanops gigasei'' is an extinct species of sea snail, a marine gastropod mollusk in the family Raphitomidae. Its specific name derives from the paleontologist Paul Gigase, the collector of the fossil specimen designated as the holotype. Description The shape and size of ''Lusitanops gigasei'' suggests it was a mobile and active predator, capable of hunting and capturing other small marine invertebrates. The pointed spire of the shell may have helped it to penetrate sand and sediment to access prey buried in the seafloor. The shell's prominent apex may have been an adaptation providing extra strength and structural support. Its shell was thick and sturdy, suggesting that it may have been adapted to living in environments with strong water currents and turbulence. It could reach a length of 6.1 mm, and a diameter of 1.9 mm. ''L. gigasei'' may be a species intermediate between ''Lusitanops'' and ''Xanthodaphne'', as it had a combination of characteristi ... [...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] |
Structural
A structure is an arrangement and organization of interrelated elements in a material object or system, or the object or system so organized. Material structures include man-made objects such as buildings and machines and natural objects such as biological organisms, minerals and chemicals. Abstract structures include data structures in computer science and musical form. Types of structure include a hierarchy (a cascade of one-to-many relationships), a network featuring many-to-many links, or a lattice featuring connections between components that are neighbors in space. Load-bearing Buildings, aircraft, skeletons, anthills, beaver dams, bridges and salt domes are all examples of load-bearing structures. The results of construction are divided into buildings and non-building structures, and make up the infrastructure of a human society. Built structures are broadly divided by their varying design approaches and standards, into categories including building structure ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kallo
Kallo is a village and ''deelgemeente'' (sub-municipality) of Beveren in East Flanders, Belgium. Kallo was an independent municipality until 1 January 1977, when it merged with Beveren as part of the fusion of municipalities in Belgium. Most of the ''deelgemeente'' consists of harbours and industrial zones. History Kallo is one of the oldest settlements of the Waasland. The Frisii used to live on the higher parts which could not be flooded by the Scheldt. According to legend, the inhabitants were christened by Amandus in the 7th century, however the first written evidence of a church dates from 1179. Kallo was originally a fishing village. In 1316, the village was destroyed and the land was inundated by William III, Count of Holland. In 1583, during the Dutch Revolt, the land was again inundated by Alexander Farnese, Duke of Parma which resulted in a severe decline of the village. The area was ''repoldered'' in the 17th century. In 1638, war returned, and the Battle of Kallo was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pliocene
The Pliocene ( ; also Pleiocene) is the epoch in the geologic time scale that extends from 5.333 million to 2.58See the 2014 version of the ICS geologic time scale million years ago. It is the second and most recent epoch of the Neogene Period in the . The Pliocene follows the Epoch and is followed by the Epoch. Prior to the 2009 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lusitanops Expansus
''Lusitanops expansus'' is a species of sea snail, a marine gastropod mollusk in the family 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). . 39 .... Description The length of the shell attains . Distribution This species occurs off Arctic Norway in the North Atlantic Ocean. References * Gofas, S.; Le Renard, J.; Bouchet, P. (2001). Mollusca, in: Costello, M.J. et al. (Ed.) (2001). ''European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification.'' Collection Patrimoines Naturels, 50: pp. 180–213 External links Sars, G.O. (1878). Bidrag til Kundskaben om Norges arktiske Fauna. I. Mollusca Regionis Arcticae Norvegiae. Oversigt over de i Norges arktiske Region Forekommende Bløddyr. Brøgg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extant Taxon
Neontology is a part of biology that, in contrast to paleontology, deals with living (or, more generally, '' recent'') organisms. It is the study of extant taxa (singular: extant taxon): taxa (such as species, genera and families) with members still alive, as opposed to (all) being extinct. For example: * The moose (''Alces alces'') is an extant species, and the dodo (''Raphus cucullatus'') is an extinct species. * In the group of molluscs known as the cephalopods, there were approximately 600 extant species and 7,500 extinct species. A taxon can be classified as extinct if it is broadly agreed or certified that no members of the group are still alive. Conversely, an extinct taxon can be reclassified as extant if there are new discoveries of living species ("Lazarus species"), or if previously-known extant species are reclassified as members of the taxon. Most biologists, zoologists, and botanists are in practice neontologists, and the term neontologist is used large ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genera
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 clearly demons ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xanthodaphne
''Xanthodaphne'' is a genus of sea snails, marine gastropod mollusks in the family Raphitomidae. Species Species within the genus ''Xanthodaphne'' include: * '' Xanthodaphne agonia'' (Dall, 1890) * '' Xanthodaphne alessandropaglii'' Nappo & Pagli, 2022 * '' Xanthodaphne araneosa'' (R. B. Watson, 1881) * '' Xanthodaphne argeta'' (Dall, 1890) * '' Xanthodaphne bougainvillensis'' Sysoev, 1988 * '' Xanthodaphne bruneri'' (Verrill, 1884) * '' Xanthodaphne charcotiana'' Bouchet & Warén, 1980< * '' Xanthodaphne cladara'' Sysoev, 1997 * † '' Xanthodaphne contarinii'' Petracci, Bongiardino, Della Bella & Tabanelli, 2019 * '' Xanthodaphne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lusitanops
''Lusitanops'' is a genus of sea snails, marine gastropod mollusks in the family Raphitomidae. Description This genus is characterized by a reticulated sculpture, a large, inflated body whorl, a short 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 is ... and the lack of a sinus. Fossils of '' Lusitanops gigasei'' were found in Pliocene strata at Kallo, Belgium; age range: 6 to 2.588 Ma. Species Species within the genus ''Lusitanops'' include: * '' Lusitanops blanchardi'' (Dautzenberg & Fischer, 1896) * '' Lusitanops bullioides'' (Sykes, 1906) * '' Lusitanops cingulatus'' Bouchet & Warén, 1980 * '' Lusitanops dictyota'' Sysoev, 1997 * '' Lusitanops expansus'' (Sars G.O., 1878) * † '' Lusitanops gigasei'' Marquet 1998 * '' Lusitanops hyaloides'' (Dautzenberg, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turbulence
In fluid dynamics, turbulence or turbulent flow is fluid motion characterized by chaotic changes in pressure and flow velocity. It is in contrast to a laminar flow, which occurs when a fluid flows in parallel layers, with no disruption between those layers. Turbulence is commonly observed in everyday phenomena such as surf, fast flowing rivers, billowing storm clouds, or smoke from a chimney, and most fluid flows occurring in nature or created in engineering applications are turbulent. Turbulence is caused by excessive kinetic energy in parts of a fluid flow, which overcomes the damping effect of the fluid's viscosity. For this reason turbulence is commonly realized in low viscosity fluids. In general terms, in turbulent flow, unsteady vortices appear of many sizes which interact with each other, consequently drag due to friction effects increases. This increases the energy needed to pump fluid through a pipe. The onset of turbulence can be predicted by the dimensionless Rey ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Current
A current in a fluid is the magnitude and direction of flow within that fluid, such as a liquid or a gas. Types of fluid currents include: * Air current * Boundary current * Current (stream), a current in a river or stream * Longshore current * Ocean current * Rip current * Rip tide * Subsurface currents * Tidal current * Turbidity current A turbidity current is most typically an underwater current of usually rapidly moving, sediment-laden water moving down a slope; although current research (2018) indicates that water-saturated sediment may be the primary actor in the process. T ... {{Fluiddynamics-stub Fluid dynamics ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apex (mollusc)
In anatomy, an apex (adjectival form: apical) is part of the 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 conches. Gastropods The word "apex" is most often used to mean the tip of the 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:Calliostoma kiheiziebisu apex.png File:Calliostoma k ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
