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Capitellida
Capitellida is an order of annelids belonging to the class Polychaeta. Families: * Arenicolidae Johnston, 1835 * Capitellidae Grube, 1862 * Maldanidae Maldanidae is a family of more than 200 species of Marine life, marine polychaetes commonly known as bamboo worms or maldanid worms. They belong to the order Capitellida, in the phylum Annelida. They are most closely related to family Arenicolidae ... Malmgren, 1867 References Annelids {{Annelid-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Annelids
The annelids (Annelida , from Latin ', "little ring"), also known as the segmented worms, are a large phylum, with over 22,000 extant species including ragworms, earthworms, and leeches. The species exist in and have adapted to various ecologies – some in marine environments as distinct as tidal zones and hydrothermal vents, others in fresh water, and yet others in moist terrestrial environments. The Annelids are bilaterally symmetrical, triploblastic, coelomate, invertebrate organisms. They also have parapodia for locomotion. Most textbooks still use the traditional division into polychaetes (almost all marine), oligochaetes (which include earthworms) and leech-like species. Cladistic research since 1997 has radically changed this scheme, viewing leeches as a sub-group of oligochaetes and oligochaetes as a sub-group of polychaetes. In addition, the Pogonophora, Echiura and Sipuncula, previously regarded as separate phyla, are now regarded as sub-groups of polychae ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maldanidae
Maldanidae is a family of more than 200 species of Marine life, marine polychaetes commonly known as bamboo worms or maldanid worms. They belong to the order Capitellida, in the phylum Annelida. They are most closely related to family Arenicolidae, and together form the clade Maldanomorpha. Morphology Maldanid worms have a long and cylindrical body that usually bends at one or both ends. It can be divided into four parts: 1) a head, formed by a Dorsal (anatomy), dorsally positioned prostomium that is fused to the peristomium, sometimes with a flattened cephalic plate; 2) a thorax, formed by the first four wikt:chaetigers, chaetigers (i.e. Chaeta, chaetae-bearing metamery, segments), usually with strong spines; 3) an abdomen, with several longer chaetigers that are often followed by a number of achaetous (i.e. without Chaeta, chaetae) segments; 4) a posterior end, with a pygidium that contains the anus. The maldanid pygidium takes a wide variety of forms such as conical, plate-shaped ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Capitellidae
Capitellidae is a polychaete worm family in the subclass Scolecida. Genera * ''Abyssocapitella'' * ''Amastigos'' * ''Anotomastus'' * ''Baldia (worm), Baldia'' * ''Barantolla'' * ''Branchiocapitella'' * ''Capitella'' * ''Capitellethus'' * ''Capitobranchus'' * ''Dasybranchetus'' * ''Dasybranchus'' * ''Decamastus'' * ''Ditrocha'' * ''Dodecaseta'' * ''Eunotomastus'' * ''Heteromastides'' * ''Heteromastus'' * ''Leiocapitella'' * ''Leiocapitellides'' * ''Leiochrides'' * ''Leiochrus'' * ''Lumbricomastus'' * ''Mastobranchus'' * ''Mediomastus'' * ''Neoheteromastus'' * ''Neomediomastus'' * ''Neonotomastus'' * ''Neopseudocapitella'' * ''Nonatus'' * ''Notodasus'' * ''Notomastus'' * ''Octocapitella'' * ''Paracapitella'' * ''Paraleiocapitella'' * ''Parheteromastides'' * ''Parheteromastus'' * ''Peresiella'' * ''Protomastobranchus'' * ''Pseudocapitella'' * ''Pseudoleiocapitella'' * ''Pseudomastus'' * ''Pseudonotomastus'' * ''Pulliella'' * ''Rashgua'' * ''Scyphoproctus'' * ''Undecimastus'' Refe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polychaeta
Polychaeta () is a paraphyletic class of generally marine annelid worms, commonly called bristle worms or polychaetes (). Each body segment has a pair of fleshy protrusions called parapodia that bear many bristles, called chaetae, which are made of chitin. More than 10,000 species are described in this class. Common representatives include the lugworm (''Arenicola marina'') and the sandworm or clam worm ''Alitta''. Polychaetes as a class are robust and widespread, with species that live in the coldest ocean temperatures of the abyssal plain, to forms which tolerate the extremely high temperatures near hydrothermal vents. Polychaetes occur throughout the Earth's oceans at all depths, from forms that live as plankton near the surface, to a 2- to 3-cm specimen (still unclassified) observed by the robot ocean probe ''Nereus'' at the bottom of the Challenger Deep, the deepest known spot in the Earth's oceans. Only 168 species (less than 2% of all polychaetes) are known from f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arenicolidae
Arenicolidae is a family of marine polychaete worms. They are commonly known as lugworms and the little coils of sand they produce are commonly seen on the beach. Arenicolids are found worldwide, mostly living in burrows in sandy substrates. Most are detritivores but some graze on algae. Description The arenicolids are characterised by an elongated cylindrical body separated into two or three distinct regions. The prostomium has no appendages or palps. There are one or two anterior segments without setae. On the other segments, all the setae are unbranched, including the capillary setae and the rostrate uncini. The notopodia are bluntly truncate and the neuropodia are elongated tori forming long transverse welts in some of the setigers. The notosetae have either a capillary function or act as limbs and the neurosetae are rostrate hooks. There are branchiae present on some of the setigers in the middle or posterior regions. Apart from the genus '' Branchiomaldane'', the lugwor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
