|
Cerebratulus Acutus
''Cerebratulus'' is a genus of nemerteans belonging to the family Lineidae. The genus has cosmopolitan distribution. Species Species: *''Cerebratulus acutus'' *''Cerebratulus lacteus'' *''Cerebratulus marginatus ''Cerebratulus marginatus'' is a proboscis worm in the family Lineidae. This ribbon worm has an Arctic distribution, and in the North Atlantic Ocean ranges as far south as Cape Cod and the Mediterranean Sea while in the Pacific Ocean it extends ...'' References Lineidae Nemertea genera {{nemertean-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nemerteans
Nemertea is a phylum of animals also known as ribbon worms or proboscis worms, consisting of 1300 known species. Most ribbon worms are very slim, usually only a few millimeters wide, although a few have relatively short but wide bodies. Many have patterns of yellow, orange, red and green coloration. The foregut, stomach and intestine run a little below the midline of the body, the anus is at the tip of the tail, and the mouth is under the front. A little above the gut is the rhynchocoel, a cavity which mostly runs above the midline and ends a little short of the rear of the body. All species have a proboscis which lies in the rhynchocoel when inactive but everts to emerge just above the mouth to capture the animal's prey with venom. A highly extensible muscle in the back of the rhynchocoel pulls the proboscis in when an attack ends. A few species with stubby bodies filter feed and have suckers at the front and back ends, with which they attach to a host. The brain is a ring ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lineidae
Lineidae is a family of nemertean worms. It contains the following genera: * '' Aetheolineus'' Senz, 1993 * '' Ammolineus'' Senz, 2001 * ''Antarctolineus'' Muller & Scripcariu, 1964 * ''Apatronemertes'' Wilfert & Gibson, 1974 * '' Australineus'' Gibson, 1990 * '' Cephalurichus'' Gibson, 1985 * '' Colemaniella'' Gibson, 1982 * '' Corsoua'' Corrêa, 1963 * '' Craticulineus'' Gibson, 1984 * ''Diplopleura'' Stimpson, 1857 * '' Eousia'' Gibson, 1990 * ''Euborlasia'' Vaillant, 1890 * '' Flaminga'' Corrêa, 1957 * '' Fragilonemertes'' Riser, 1998 * '' Gastropion'' Moretto, 1998 * '' Heteroenopleus'' Wern, 1998 * '' Heterolineus'' Friedrich, 1935 * '' Heteronemertes'' Chernyshev, 1995 * '' Hinumanemertes'' Iwata, 1970 * '' Kirsteueria'' Gibson, 1978 * '' Kohnia'' Sundberg & Gibson, 1995 * ''Leucocephalonemertes'' Cantell, 1996 * '' Lineopsella'' Friedrich, 1970 * '' Lineopselloides'' Gibson, 1990 * ''Lineopsis'' * ''Lineus ''Lineus'' is a genus of nemertine worms, including the boo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cosmopolitan Distribution
In biogeography, cosmopolitan distribution is the term for the range of a taxon that extends across all or most of the world in appropriate habitats. Such a taxon, usually a species, is said to exhibit cosmopolitanism or cosmopolitism. The extreme opposite of a cosmopolitan species is an endemic one, being found only in a single geographical location. Qualification The caveat “in appropriate habitat” is used to qualify the term "cosmopolitan distribution", excluding in most instances polar regions, extreme altitudes, oceans, deserts, or small, isolated islands. For example, the housefly is highly cosmopolitan, yet is neither oceanic nor polar in its distribution. Related terms and concepts The term pandemism also is in use, but not all authors are consistent in the sense in which they use the term; some speak of pandemism mainly in referring to diseases and pandemics, and some as a term intermediate between endemism and cosmopolitanism, in effect regarding pandemism as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cerebratulus Acutus
''Cerebratulus'' is a genus of nemerteans belonging to the family Lineidae. The genus has cosmopolitan distribution. Species Species: *''Cerebratulus acutus'' *''Cerebratulus lacteus'' *''Cerebratulus marginatus ''Cerebratulus marginatus'' is a proboscis worm in the family Lineidae. This ribbon worm has an Arctic distribution, and in the North Atlantic Ocean ranges as far south as Cape Cod and the Mediterranean Sea while in the Pacific Ocean it extends ...'' References Lineidae Nemertea genera {{nemertean-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cerebratulus Lacteus
''Cerebratulus lacteus'', the milky nemertean or milky ribbon worm, is a proboscis worm in the family Lineidae. This ribbon worm has a wide geographical range on both sides of the northern Atlantic Ocean. Description ''Cerebratulus lacteus'' grows to a length of about and a width of . The head is rounded and flattened, with a pair of cerebral organs and cephalic grooves, but no eyes. The head is not readily distinguishable from the body, which is flattened and gradually tapers towards the tail, where there is a slender caudal cirrus. This worm is usually milky-white in colour but may be pink. Ecology ''Cerebratulus lacteus'' burrows in muddy sediments into which it can burrow rapidly. It is a voracious predator and has been observed attacking bivalve molluscs and crustaceans. The proboscis is everted (turned inside out) and the lower half of the Atlantic jackknife clam (''Ensis directus'') is enveloped. In an effort to escape, the clam works its way out of the sediment and may ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cerebratulus Marginatus
''Cerebratulus marginatus'' is a proboscis worm in the family Lineidae. This ribbon worm has an Arctic distribution, and in the North Atlantic Ocean ranges as far south as Cape Cod and the Mediterranean Sea while in the Pacific Ocean it extends southwards to California. Description ''Cerebratulus marginatus'' is a long, flattened worm that when fully extended grows to a length of over a metre (yard), but can contract to less than half its full length. Its width can be around . The head tapers to a blunt point and the cephalic furrows are wide. The eyes contain dark pigment and are tiny and difficult to distinguish. Behind the mouth the body becomes dorso-ventrally flattened and often has wrinkles and folds which gives the worm its convoluted appearance. At the end of the body is a slender transparent caudal cirrus. The colour of this worm is somewhat variable; it is usually greyish-brown with pale or transparent edges, but the dorsal surface in older individuals is often darker ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
