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Hystrivasum
''Hystrivasum'' is an extinct genus of medium-sized fossil predatory gastropods in the family Turbinellidae. The species in this genus are known from the Pliocene and Pleistocene deposits of Florida. Species Species within the genus ''Hystrivasum'' includ* ''Hystrivasum horridum ''Hystrivasum horridum'', common name the rough or shaggy vase, is a fossil species of medium-sized predatory gastropod in the family Turbinellidae. This species is extinct and is found in the Pleistocene deposits of Florida. Etymology The spe ...'' * '' Hystrivasum jacksonense'' * '' Hystrivasum locklini'' * '' Hystrivasum squamosum'' References * E. H. Vokes. 1966. The genus Vasum (Mollusca: Gastropoda) in the new world. Tulane Studies in Geology and Paleontology 5(1):1-35 {{Taxonbar, from=Q5962430 Turbinellidae Pleistocene gastropods ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hystrivasum Horridum
''Hystrivasum horridum'', common name the rough or shaggy vase, is a fossil species of medium-sized predatory gastropod in the family Turbinellidae. This species is extinct and is found in the Pleistocene deposits of Florida. Etymology The specific name ''horridum'' is Latin for "rough" or "shaggy" and does not mean "horrid". Shell description Like other species in the subfamily Vasinae, ''Hystrivasum horridum'' shells are large, thick and heavy. They are vase-shaped, in the sense that they are biconical. The shells have moderate spires, and have several plaits on the columella. ''Hystrivasum horridum'', formerly ''Vasum horridum'', belongs to an extinct group that is easily distinguished from modern ''Vasum'' by the presence of two sets of spines or nodes located on the shoulder of the whorls. These spines can be found at the suture and at the periphery of the shoulder. ''H. horridum'' has 12-15 wide, scoop-like spines that project almost horizontally from the shoulder. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hystrivasum Squamosum
''Hystrivasum squamosum'' is an extinct species of medium-sized fossil sea snail, a predatory marine gastropod in the family Turbinellidae Turbinellidae are a family of sea snails, marine gastropod mollusks in the clade Neogastropoda. Members of this family are predators. Distribution Species in this family are found worldwide, mostly in tropical shallow waters but some in deep w .... References * E. H. Vokes. 1966. The genus Vasum (Mollusca: Gastropoda) in the new world. Tulane Studies in Geology and Paleontology 5(1):1-35 {{Taxonbar, from=Q5962433 Turbinellidae Prehistoric gastropods Gastropods described in 1971 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turbinellidae
Turbinellidae are a family of sea snails, marine gastropod mollusks in the clade Neogastropoda. Members of this family are predators. Distribution Species in this family are found worldwide, mostly in tropical shallow waters but some in deep waters. Subfamilies * sub-family Columbariinae Tomlin, 1928 ** genus ''Columbarium'' Martens, 1881 ** genus '' Coluzea'' Finlay, 1926 ** genus '' Fulgurofusus'' Grabau, 1904 ** genus '' Fustifusus'' Harasewych, 1991 ** genus '' Peristarium'' Bayer, 1971 * sub-family Tudiclinae Cossmann, 1901 ** genus '' Tudicla'' Röding, 1798 * sub-family Turbinellinae Swainson, 1835 ** genus '' Cryptofusus'' Beu, 2011 ** genus ''Syrinx'' Röding, 1798 ** genus '' Turbinella'' Lamarck, 1799 * sub-family Vasinae H. Adams & A. Adams, 1853 (1840) ** genus '' Altivasum'' Hedley, 1914 ** genus '' Enigmavasum'' Poppe & Tagaro, 2005 ** genus '' Pisanella'' Koenen, 1865 ** genus '' Tudivasum'' Rosenberg & Petit, 1987 ** genus '' Vasum'' Röding, 1798 * genus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastropod Shell
The gastropod shell is part of the body of many gastropods, including snails, a kind of mollusc. The shell is an exoskeleton, which protects from predators, mechanical damage, and dehydration, but also serves for muscle attachment and calcium storage. Some gastropods appear shell-less (slugs) but may have a remnant within the mantle, or in some cases the shell is reduced such that the body cannot be retracted within it (semi-slug). Some snails also possess an operculum that seals the opening of the shell, known as the Aperture (mollusc), aperture, which provides further protection. The study of mollusc shells is known as conchology. The biological study of gastropods, and other molluscs in general, is malacology. Shell morphology terms vary by species group. Shell layers The gastropod shell has three major layers secreted by the Mantle (mollusc), mantle. The calcareous central layer, ostracum, is typically made of calcium carbonate (CaCO3) precipitated into an organic matrix ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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] |
Predatory
Predation is a biological interaction in which one organism, the predator, kills and eats another organism, its prey. It is one of a family of common feeding behaviours that includes parasitism and micropredation (which usually do not kill the host) and parasitoidism (which always does, eventually). It is distinct from scavenging on dead prey, though many predators also scavenge; it overlaps with herbivory, as seed predators and destructive frugivores are predators. Predation behavior varies significantly depending on the organism. Many predators, especially carnivores, have evolved distinct hunting strategies. Pursuit predation involves the active search for and pursuit of prey, whilst ambush predators instead wait for prey to present an opportunity for capture, and often use stealth or aggressive mimicry. Other predators are opportunistic or omnivorous and only practice predation occasionally. Most obligate carnivores are specialized for hunting. They may have ac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastropod
Gastropods (), commonly known as slugs and snails, belong to a large Taxonomy (biology), taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, freshwater, and from the land. There are many thousands of species of sea snails and sea slug, slugs, as well as freshwater snails, freshwater limpets, land snails and slugs. The class Gastropoda is a diverse and highly successful class of mollusks within the phylum Mollusca. It 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 Furongian, Late Cambrian. , 721 family (taxonomy), families of gastropods are known, of which 245 are extinct and appear only in the fossil record, while 476 are currently neontology, extant living fossil, with or without a fossil record. Gastropoda (previously known as univalves and sometimes spelled "Gasteropoda") are a major part of the phylum Mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Family (biology)
Family (, : ) 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". The delineation of what constitutes a family—or whether a described family should be acknowledged—is established and decided upon by active taxonomists. There are not strict regulations for outlining or acknowledging a family, yet in the realm of plants, these classifications often rely on both the vegetative and reproductive characteristics of plant species. Taxonomists frequently hold varying perspectives on these descriptions, leading to a lack of widespread consensus within the scientific community ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pliocene
The Pliocene ( ; also Pleiocene) is the epoch (geology), epoch in the geologic time scale that extends from 5.33 to 2.58See the 2014 version of the ICS geologic time scale million years ago (Ma). It is the second and most recent epoch of the Neogene Period in the Cenozoic, Cenozoic Era. The Pliocene follows the Miocene Epoch and is followed by the Pleistocene Epoch. Prior to the 2009 revision of the geologic time scale, which placed the four most recent major glaciations entirely within the Pleistocene, the Pliocene also included the Gelasian Stage, which lasted from 2.59 to 1.81 Ma, and is now included in the Pleistocene. As with other older geologic periods, the Stratum, geological strata that define the start and end are well-identified but the exact dates of the start a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleistocene
The Pleistocene ( ; referred to colloquially as the ''ice age, Ice Age'') is the geological epoch (geology), epoch that lasted from to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was finally confirmed in 2009 by the International Union of Geological Sciences, the cutoff of the Pleistocene and the preceding Pliocene was regarded as being 1.806 million years Before Present (BP). Publications from earlier years may use either definition of the period. The end of the Pleistocene corresponds with the end of the last glacial period and also with the end of the Paleolithic age used in archaeology. The name is a combination of Ancient Greek () 'most' and (; Latinized as ) 'new'. The aridification and cooling trends of the preceding Neogene were continued in the Pleistocene. The climate was strongly variable depending on the glacial cycle, oscillating between cold Glacial period, glacial periods and warmer Interglacial, int ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
