|
Megabalanus Tintinnabulum
''Megabalanus'' is a genus of barnacles in the family Balanidae. Members of the genus grow to in length and inhabit the lower intertidal zone. Morphology ''Megabalanus'' is an acorn barnacle, a sessile crustacean that secretes a calcium carbonate shell consisting of five plates. It reaches up to in height . Ecology Like other barnacles, they are suspension feeders, grabbing particulate matter from the water column overhead. ''M. tintinnabulum'' has a worldwide distribution and is commonly found on wave-beaten shores, in the lower intertidal zone. They tend to grow in clusters of around 12 individuals. Other species are more select, such as ''M. californicus'' of tidal habitats in California and the greater North American Pacific Coast. While many barnacles deal with competition for space by organisms such as limpets and mussels by growing many organisms close together in colonies, ''Megabalanus'' responds by rapidly growing to a very large size. Their large size also hel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barnacle
Barnacles are arthropods of the subclass (taxonomy), subclass Cirripedia in the subphylum Crustacean, Crustacea. They are related to crabs and lobsters, with similar Nauplius (larva), nauplius larvae. Barnacles are exclusively marine invertebrates; many species live in shallow and tidal waters. Some 2,100 species have been described. Barnacle adults are Sessility (motility), sessile; most are Filter feeder, suspension feeders with hard calcareous shells, but the Rhizocephala are parasitic castration, specialized parasites of other crustaceans, with reduced bodies. Barnacles have existed since at least the mid-Carboniferous, some 325 million years ago. In folklore, barnacle geese were once held to emerge fully formed from goose barnacles. Both goose barnacles and the Austromegabalanus psittacus, Chilean giant barnacle are fished and eaten. Barnacles are economically significant as biofouling on ships, where they cause hydrodynamic Drag (physics), drag, reducing efficiency. Ety ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trace Fossil
A trace fossil, also called an ichnofossil (; ), is a fossil record of biological activity by lifeforms, but not the preserved remains of the organism itself. Trace fossils contrast with body fossils, which are the fossilized remains of parts of organisms' bodies, usually altered by later chemical activity or by mineralization. The study of such trace fossils is ichnology - the work of ichnologists. Trace fossils may consist of physical impressions made on or in the substrate by an organism. For example, burrows, borings ( bioerosion), urolites (erosion caused by evacuation of liquid wastes), footprints, feeding marks, and root cavities may all be trace fossils. The term in its broadest sense also includes the remains of other organic material produced by an organism; for example coprolites (fossilized droppings) or chemical markers (sedimentological structures produced by biological means; for example, the formation of stromatolites). However, most sedimentary struct ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megabalanus Dorbignii
''Megabalanus'' is a genus of barnacles in the family Balanidae. Members of the genus grow to in length and inhabit the lower intertidal zone. Morphology ''Megabalanus'' is an acorn barnacle, a sessile crustacean that secretes a calcium carbonate shell consisting of five plates. It reaches up to in height . Ecology Like other barnacles, they are suspension feeders, grabbing particulate matter from the water column overhead. ''M. tintinnabulum'' has a worldwide distribution and is commonly found on wave-beaten shores, in the lower intertidal zone. They tend to grow in clusters of around 12 individuals. Other species are more select, such as ''M. californicus'' of tidal habitats in California and the greater North American Pacific Coast. While many barnacles deal with competition for space by organisms such as limpets and mussels by growing many organisms close together in colonies, ''Megabalanus'' responds by rapidly growing to a very large size. Their large size also hel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megabalanus Coccopoma
''Megabalanus coccopoma'', the titan acorn barnacle, is a tropical species of barnacle first described by Charles Darwin Charles Robert Darwin ( ; 12 February 1809 – 19 April 1882) was an English Natural history#Before 1900, naturalist, geologist, and biologist, widely known for his contributions to evolutionary biology. His proposition that all speci ... in 1854. Its native range is the Pacific coasts of South and Central America but it is extending its range to other parts of the world. Description The titan acorn barnacle is a large species with calcareous plates forming a steep-sided cone which grows to a height and width of . The plates are smooth and are fused together. They are pink and are separated by narrow purple or white radii and the aperture at the top is small. In the Pacific Ocean this species can be confused with ''Megabalanus californicus'' but that species is a darker colour, has a wider aperture and has wider rays between the plates. Distribu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megabalanus Clippertonensis
''Megabalanus'' is a genus of barnacles in the family Balanidae. Members of the genus grow to in length and inhabit the lower intertidal zone. Morphology ''Megabalanus'' is an acorn barnacle, a sessile crustacean that secretes a calcium carbonate shell consisting of five plates. It reaches up to in height . Ecology Like other barnacles, they are suspension feeders, grabbing particulate matter from the water column overhead. ''M. tintinnabulum'' has a worldwide distribution and is commonly found on wave-beaten shores, in the lower intertidal zone. They tend to grow in clusters of around 12 individuals. Other species are more select, such as ''M. californicus'' of tidal habitats in California and the greater North American Pacific Coast. While many barnacles deal with competition for space by organisms such as limpets and mussels by growing many organisms close together in colonies, ''Megabalanus'' responds by rapidly growing to a very large size. Their large size also hel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megabalanus Californicus
''Megabalanus californicus'', the California barnacle, is a species of large barnacle in the family Balanidae. It is native to rocky coasts in the Eastern Pacific Ocean from North California to the Gulf of California. Description ''Megabalanus californicus'' is a large acorn barnacle with a diameter of up to . The steep-sided shell is formed of six plates finely striped vertically with reddish-purple and white. There are relatively wide, reddish radii between the plates where they fuse. The mantle, visible through the wide aperture, is margined with red, orange, yellow and blue. This barnacle could be confused with ''Megabalanus coccopoma'', but that species is paler, has a smaller aperture and narrower radii between the plates. Distribution and habitat ''Megabalanus californicus'' occurs in the Eastern Pacific Ocean in the subtidal and intertidal zones of rocky shores. Its range extends from northern California southwards to the Gulf of California. It usually grows in groups and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megabalanus Azoricus
''Megabalanus'' is a genus of barnacles in the family Balanidae. Members of the genus grow to in length and inhabit the lower intertidal zone. Morphology ''Megabalanus'' is an acorn barnacle, a sessile crustacean that secretes a calcium carbonate shell consisting of five plates. It reaches up to in height . Ecology Like other barnacles, they are suspension feeders, grabbing particulate matter from the water column overhead. ''M. tintinnabulum'' has a worldwide distribution and is commonly found on wave-beaten shores, in the lower intertidal zone. They tend to grow in clusters of around 12 individuals. Other species are more select, such as ''M. californicus'' of tidal habitats in California and the greater North American Pacific Coast. While many barnacles deal with competition for space by organisms such as limpets and mussels by growing many organisms close together in colonies, ''Megabalanus'' responds by rapidly growing to a very large size. Their large size also hel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megabalanus Antillensis
''Megabalanus'' is a genus of barnacles in the Family (biology), family Balanidae. Members of the genus grow to in length and inhabit the lower intertidal zone. Morphology ''Megabalanus'' is an acorn barnacle, a sessile crustacean that secretes a calcium carbonate shell consisting of five plates. It reaches up to in height . Ecology Like other barnacles, they are suspension feeders, grabbing particulate matter from the water column overhead. ''M. tintinnabulum'' has a worldwide distribution and is commonly found on wave-beaten shores, in the lower intertidal zone. They tend to grow in clusters of around 12 individuals. Other species are more select, such as ''M. californicus'' of tidal habitats in California and the greater North American Pacific Coast. While many barnacles deal with competition for space by organisms such as limpets and mussels by growing many organisms close together in colonies, ''Megabalanus'' responds by rapidly growing to a very large size. Their la ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Darwin
Charles Robert Darwin ( ; 12 February 1809 – 19 April 1882) was an English Natural history#Before 1900, naturalist, geologist, and biologist, widely known for his contributions to evolutionary biology. His proposition that all species of life have descended from a Common descent, common ancestor is now generally accepted and considered a fundamental scientific concept. In a joint presentation with Alfred Russel Wallace, he introduced his scientific theory that this Phylogenetics, branching pattern of evolution resulted from a process he called natural selection, in which the struggle for existence has a similar effect to the artificial selection involved in selective breeding.. Darwin has been described as one of the most influential figures in human history and was honoured by Burials and memorials in Westminster Abbey, burial in Westminster Abbey. Darwin's early interest in nature led him to neglect his medical education at the University of Edinburgh Medical Schoo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
