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Pomatiopsis Californica
''Pomatiopsis'' is a genus of amphibious snails with gills and an operculum, aquatic freshwater gastropod mollusks in the family Pomatiopsidae. ''Pomatiopsis'' is the type genus of the family Pomatiopsidae. Distribution The distribution of the genus ''Pomatiopsis'' includes the USA: West Coast of the United States, Midwestern United States and Eastern United States.Davis G. M. (1979). "The origin and evolution of the gastropod family Pomatiopsidae, with emphasis on the Mekong river Triculinae". ''Academy of natural Sciences of Philadelphia'', Monograph 20: 1-120. at Google Books Description In 1862, the American malacologist George Washington Tryon first defined this genus. Tryon's diagnosis reads as follows: Species There are four species within the genus ''Pomatiopsis'': * ''Pomatiopsis binneyi'' Tryon, 1863 * ''Pomatiopsis californica'' Pilsbry, 1899 * ''Pomatiopsis chacei'' Pilsbry, 1937 * ''Pomatiopsis cincinnatiensis'' (Lea, 1840) * ''Pomatiopsis hinkleyi'' Pilsbry, 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animal
Animals are multicellular, eukaryotic organisms in the Kingdom (biology), biological kingdom Animalia. With few exceptions, animals Heterotroph, consume organic material, Cellular respiration#Aerobic respiration, breathe oxygen, are Motility, able to move, can Sexual reproduction, reproduce sexually, and go through an ontogenetic stage in which their body consists of a hollow sphere of Cell (biology), cells, the blastula, during Embryogenesis, embryonic development. Over 1.5 million Extant taxon, living animal species have been Species description, described—of which around 1 million are Insecta, insects—but it has been estimated there are over 7 million animal species in total. Animals range in length from to . They have Ecology, complex interactions with each other and their environments, forming intricate food webs. The scientific study of animals is known as zoology. Most living animal species are in Bilateria, a clade whose members have a Symmetry in biology#Bilate ... [...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] |
Pomatiopsis Hinkleyi
''Pomatiopsis lapidaria'' is an amphibious species of snail with gills and an operculum, a gastropod mollusk in the family Pomatiopsidae. ''Pomatiopsis lapidaria'' is the type species of the genus ''Pomatiopsis''. Distribution The distribution of ''Pomatiopsis lapidaria'' includes the USA. The type locality was not recorded. Ecology ''Pomatiopsis lapidaria'' is amphibious: it lives in damp or wet habitats on marshy ground and in soil that is periodically flooded.Davis G. M. (1979). "The origin and evolution of the gastropod family Pomatiopsidae, with emphasis on the Mekong river Triculinae". ''Academy of natural Sciences of Philadelphia The Academy of Natural Sciences of Drexel University, formerly the Academy of Natural Sciences of Philadelphia, is the oldest natural science research institution and museum in the Americas. It was founded in 1812, by many of the leading natura ...'', Monograph 20: 1-120. at Google Books Dundee (1957) described the life history and th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pomatiopsis Cincinnatiensis
''Pomatiopsis'' is a genus of amphibious snails with gills and an operculum, aquatic freshwater gastropod mollusks in the family Pomatiopsidae. ''Pomatiopsis'' is the type genus of the family Pomatiopsidae. Distribution The distribution of the genus ''Pomatiopsis'' includes the USA: West Coast of the United States, Midwestern United States and Eastern United States.Davis G. M. (1979). "The origin and evolution of the gastropod family Pomatiopsidae, with emphasis on the Mekong river Triculinae". ''Academy of natural Sciences of Philadelphia'', Monograph 20: 1-120. at Google Books Description In 1862, the American malacologist George Washington Tryon first defined this genus. Tryon's diagnosis reads as follows: Species There are four species within the genus ''Pomatiopsis'': * ''Pomatiopsis binneyi'' Tryon, 1863 * ''Pomatiopsis californica'' Pilsbry, 1899 * ''Pomatiopsis chacei'' Pilsbry, 1937 * ''Pomatiopsis cincinnatiensis'' (Lea, 1840) * ''Pomatiopsis hinkleyi'' Pilsbry, 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pomatiopsis Chacei
''Pomatiopsis'' is a genus of amphibious snails with gills and an operculum, aquatic freshwater gastropod mollusks in the family Pomatiopsidae. ''Pomatiopsis'' is the type genus of the family Pomatiopsidae. Distribution The distribution of the genus ''Pomatiopsis'' includes the USA: West Coast of the United States, Midwestern United States and Eastern United States.Davis G. M. (1979). "The origin and evolution of the gastropod family Pomatiopsidae, with emphasis on the Mekong river Triculinae". ''Academy of natural Sciences of Philadelphia'', Monograph 20: 1-120. at Google Books Description In 1862, the American malacologist George Washington Tryon first defined this genus. Tryon's diagnosis reads as follows: Species There are four species within the genus ''Pomatiopsis'': * ''Pomatiopsis binneyi'' Tryon, 1863 * ''Pomatiopsis californica'' Pilsbry, 1899 * ''Pomatiopsis chacei'' Pilsbry, 1937 * ''Pomatiopsis cincinnatiensis'' (Lea, 1840) * ''Pomatiopsis hinkleyi'' Pilsbry, 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pomatiopsis Californica
''Pomatiopsis'' is a genus of amphibious snails with gills and an operculum, aquatic freshwater gastropod mollusks in the family Pomatiopsidae. ''Pomatiopsis'' is the type genus of the family Pomatiopsidae. Distribution The distribution of the genus ''Pomatiopsis'' includes the USA: West Coast of the United States, Midwestern United States and Eastern United States.Davis G. M. (1979). "The origin and evolution of the gastropod family Pomatiopsidae, with emphasis on the Mekong river Triculinae". ''Academy of natural Sciences of Philadelphia'', Monograph 20: 1-120. at Google Books Description In 1862, the American malacologist George Washington Tryon first defined this genus. Tryon's diagnosis reads as follows: Species There are four species within the genus ''Pomatiopsis'': * ''Pomatiopsis binneyi'' Tryon, 1863 * ''Pomatiopsis californica'' Pilsbry, 1899 * ''Pomatiopsis chacei'' Pilsbry, 1937 * ''Pomatiopsis cincinnatiensis'' (Lea, 1840) * ''Pomatiopsis hinkleyi'' Pilsbry, 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pomatiopsis Binneyi
''Pomatiopsis'' is a genus of amphibious snails with gills and an operculum, aquatic freshwater gastropod mollusks in the family Pomatiopsidae. ''Pomatiopsis'' is the type genus of the family Pomatiopsidae. Distribution The distribution of the genus ''Pomatiopsis'' includes the USA: West Coast of the United States, Midwestern United States and Eastern United States.Davis G. M. (1979). "The origin and evolution of the gastropod family Pomatiopsidae, with emphasis on the Mekong river Triculinae". ''Academy of natural Sciences of Philadelphia'', Monograph 20: 1-120. at Google Books Description In 1862, the American malacologist George Washington Tryon first defined this genus. Tryon's diagnosis reads as follows: Species There are four species within the genus ''Pomatiopsis'': * ''Pomatiopsis binneyi'' Tryon, 1863 * ''Pomatiopsis californica'' Pilsbry, 1899 * ''Pomatiopsis chacei'' Pilsbry, 1937 * ''Pomatiopsis cincinnatiensis'' (Lea, 1840) * ''Pomatiopsis hinkleyi'' Pilsbry, 1 ... [...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] |
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] |
Spire (mollusc)
A spire is a part of the coiled shell of molluscs. The spire consists of all of the whorls except for the body whorl. Each spire whorl represents a rotation of 360°. A spire is part of the shell of a snail, a gastropod mollusc, a gastropod shell, and also the whorls of the shell in ammonites, which are fossil shelled cephalopods. In textbook illustrations of gastropod shells, the tradition (with a few exceptions) is to show most shells with the spire uppermost on the page. The spire, when it is not damaged or eroded, includes the protoconch (also called the nuclear whorls or the larval shell), and most of the subsequent teleoconch whorls (also called the postnuclear whorls), which gradually increase in area as they are formed. Thus the spire in most gastropods is pointed, the tip being known as the "apex". The word "spire" is used, in an analogy to a church spire or rock spire, a high, thin, pinnacle. The "spire angle" is the angle, as seen from the apex, at which a spire ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastropod Shell
The gastropod shell is part of the body of a Gastropoda, gastropod or snail, 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, tracum, is typically made of calcium carbonate precipitated into an organic matrix known as c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Academy Of Natural Sciences Of Philadelphia
The Academy of Natural Sciences of Drexel University, formerly the Academy of Natural Sciences of Philadelphia, is the oldest natural science research institution and museum in the Americas. It was founded in 1812, by many of the leading naturalists of the young American republic with an expressed mission of "the encouragement and cultivation of the sciences". It has sponsored expeditions, conducted original environmental and systematics research, and amassed natural history collections containing more than 17 million specimens. The Academy also organizes public exhibits and educational programs for both schools and the general public. History During the first decades of the United States, Philadelphia was the cultural capital and one of the country's commercial centers. Two of the city's institutions, the Library Company and the American Philosophical Society, were centers of enlightened thought and scientific inquiry. The increasing sophistication of the earth and life scie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
