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Prochaetodermatidae
The Prochaetodermatidae are a family of small worm-shaped (<1 cm) chaetoderm s. The burrowing organisms lack a true foot; they have a large pair of jaws and a small , comprising a dozen rows of paired teeth. They are known from around the globe, except in polar region
The polar regions, also called the frigid geographical zone, zones or polar zones, of Earth are the regions of the planet that surround its geographical poles (the North Pole, North and South Poles), lying within the polar cir ...
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Chevroderma
''Chevroderma'' is a genus of molluscs belonging to the family Prochaetodermatidae. The species of this genus are found in Atlantic Ocean The Atlantic Ocean is the second-largest of the world's five oceans, with an area of about . It covers approximately 20% of Earth's surface and about 29% of its water surface area. It is known to separate the " Old World" of Africa, Europe .... Species: *'' Chevroderma cuspidatum'' *'' Chevroderma gauson'' *'' Chevroderma hadalis'' *'' Chevroderma javanicum'' *'' Chevroderma lusae'' *'' Chevroderma paradoxum'' *'' Chevroderma scalpellum'' *'' Chevroderma turnerae'' *'' Chevroderma vityazi'' *'' Chevroderma whitlatchi'' References {{Taxonbar, from=Q18580852 Molluscs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Claviderma
''Claviderma'' is a genus of molluscs belonging to the family Prochaetodermatidae. The species of this genus are found on the coasts of Atlantic Ocean The Atlantic Ocean is the second-largest of the world's five oceans, with an area of about . It covers approximately 20% of Earth's surface and about 29% of its water surface area. It is known to separate the " Old World" of Africa, Europe ... and Australia. Species: *'' Claviderma amplum'' *'' Claviderma australe'' *'' Claviderma brevicaudatum'' *'' Claviderma compactum'' *'' Claviderma crassum'' *'' Claviderma gagei'' *'' Claviderma gladiatum'' *'' Claviderma laticarinatum'' *'' Claviderma mexicanum'' *'' Claviderma tricosum'' *'' Claviderma virium'' References {{Taxonbar, from=Q18583528 Molluscs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lonchoderma
''Lonchoderma'' is a genus of molluscs belonging to the family Prochaetodermatidae The Prochaetodermatidae are a family of small worm-shaped (<1 cm) chaetoderm . Species: * ''Lonchoderma longisquamosum'' (Salvini-Plawen, 1986) References {{Taxonbar, from=Q18580088 Molluscs ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Worm
Worms are many different distantly related bilateral animals that typically have a long cylindrical tube-like body, no limbs, and no eyes (though not always). Worms vary in size from microscopic to over in length for marine polychaete worms (bristle worms); for the African giant earthworm, ''Microchaetus rappi''; and for the marine nemertean worm (bootlace worm), ''Lineus longissimus''. Various types of worm occupy a small variety of parasitic niches, living inside the bodies of other animals. Free-living worm species do not live on land but instead live in marine or freshwater environments or underground by burrowing. In biology, "worm" refers to an obsolete taxon, ''vermes'', used by Carolus Linnaeus and Jean-Baptiste Lamarck for all non-arthropod invertebrate animals, now seen to be paraphyletic. The name stems from the Old English word ''wyrm''. Most animals called "worms" are invertebrates, but the term is also used for the amphibian caecilians and the slowworm '' A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chaetoderma (mollusc)
''Chaetoderma'' is a speciose genus of aplacophoran mollusc.Shuichi Shigeno, Takenori Sasaki, Gerhard Haszprunar (2007Central Nervous System of ''Chaetoderma japonicum'' (Caudofoveata, Aplacophora): Implications for Diversified Ganglionic Plans in Early Molluscan Evolution ''Biological Bulletin'' 213: 122-134. It has forty described species at present. Species * '' Chaetoderma abidjanense'' Scheltema, 1976 * '' Chaetoderma afanasjevi'' * '' Chaetoderma akkesiense'' * '' Chaetoderma araucanae'' * '' Chaetoderma argentum'' * '' Chaetoderma bacillum'' * '' Chaetoderma californicum'' * '' Chaetoderma canadense'' * '' Chaetoderma christikovi'' * '' Chaetoderma elegans'' Scheltema, 1976Gistle worm * '' Chaetoderma eruditum'' * '' Chaetoderma glaciale'' * '' Chaetoderma hancocki'' * '' Chaetoderma hawaiiense'' * '' Chaetoderma indicum'' * '' Chaetoderma intermedium'' * '' Chaetoderma japonicum'' * '' Chaetoderma kafanovi'' * '' Chaetoderma lucidum'' * '' Chaetoderma luitfriedi'' * '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mollusc
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 gastropods ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radula
The radula (, ; plural radulae or radulas) is an anatomical structure used by molluscs for feeding, sometimes compared to a tongue. It is a minutely toothed, chitinous ribbon, which is typically used for scraping or cutting food before the food enters the esophagus. The radula is unique to the molluscs, and is found in every class of mollusc except the bivalves, which instead use cilia, waving filaments that bring minute organisms to the mouth. Within the gastropods, the radula is used in feeding by both herbivorous and carnivorous snails and slugs. The arrangement of teeth ( denticles) on the radular ribbon varies considerably from one group to another. In most of the more ancient lineages of gastropods, the radula is used to graze, by scraping diatoms and other microscopic algae off rock surfaces and other substrates. Predatory marine snails such as the Naticidae use the radula plus an acidic secretion to bore through the shell of other molluscs. Other predatory marine snails ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polar Region
The polar regions, also called the frigid geographical zone, zones or polar zones, of Earth are the regions of the planet that surround its geographical poles (the North Pole, North and South Poles), lying within the polar circles. These high latitudes are dominated by floating Arctic ice pack, sea ice covering much of the Arctic Ocean in the north, and by the Antarctic ice sheet on the continent of Antarctica and the Southern Ocean in the south. Definitions The Arctic has various definitions, including the region north of the Arctic Circle (currently Epoch 2010 at 66°33'44" N), or just the region north of 60th parallel north, 60° north latitude, or the region from the North Pole north to the Tree line, timberline. The Antarctic is usually defined simply as south of 60th parallel south, 60° south latitude, or the continent of Antarctica. The 1959 Antarctic Treaty System, Antarctic Treaty uses the former definition. The two polar regions are distinguished from the other two c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
