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Acrocirridae
Acrocirridae is a family (biology), family of polychaete worms. Acrocirrids are detritivores (deposit feeders), catching marine snow, falling particles with numerous long prostomium, prostomial tentacles. There are eight known genus, genera, and at least 21 described species and subspecies within the Acrocirridae. The acrocirrids are primarily Benthic zone, benthic (seabed-dwelling) animals, but at least two genera (''Swima'' and ''Teuthidodrilus'') appear to have evolved or adapted to a pelagic fish, pelagic (free-swimming) habitat. Systematics Following is a list of genera and species within the family Acrocirridae: * Genus ''Acrocirrus'' Grube, 1873 ** ''Acrocirrus aciculigerus'' Kudenov, 1976 ** ''Acrocirrus bansei'' Magalhães & Bailey-Brock, 2012 ** ''Acrocirrus columbianus'' Banse, 1979 ** ''Acrocirrus crassifilis'' Moore, 1923 ** ''Acrocirrus frontifilis'' (Grube, 1860) ** ''Acrocirrus heterochaetus'' Annenkova, 1934 ** ''Acrocirrus incisa'' Kudenov, 1975 ** ''Acrocirrus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Teuthidodrilus
''Teuthidodrilus samae'', dubbed as the squidworm, is a species of acrocirrid marine annelid worms. It is free-swimming and can be found in the deep sea water column at depths of . It feeds on marine snow and can grow to about in length and in width. It is named for the ten squid-like appendages emerging from its head. It was discovered in 2007 in the benthopelagic zone of the Celebes Sea, near the Tawi-Tawi islands of the Philippines. It is the only species in the genus ''Teuthidodrilus''. Discovery ''Teuthidodrilus samae'' was discovered in the 2007 "Exploring the Inner Space of the Celebes Sea" expedition by the remotely operated underwater vehicle '' Global Explorer ROV'' operated from the Philippine research vessel BRP ''Hydrographer Presbitero''. Seven specimens were observed and collected from the deep-water column of the seafloor) of the Celebes Sea near the Tawi-Tawi islands of the Philippines. This area is part of the Coral Triangle, a location known for its incre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swima
''Swima'' is a genus of marine polychaete worms found in the ocean at depths between 1,800 and 3,700 meters (5,900 and 12,140 feet). Even if they are agile swimmers, they are often seen hanging immobile in the water column as they are neutrally buoyant. This deep ocean pelagic (free-swimming) genus has modified bioluminescent gills that can be cast off from an individual. These discarded gills somewhat resemble green "bombs" that remain illuminated for several seconds after they have been discarded. It is thought that this is a defensive mechanism rather than reproductive, as it is seen in both mature and juvenile individuals. And because they are eyeless, communicating with light would be difficult. ''Swima'' worms are closely related to the recently discovered genus ''Teuthidodrilus'', another pelagic cirratuliform of the bathyal zone. Discovery The first specimens of the genus ''Swima'' were discovered in the deep trenches of Monterey Bay, off the coast of California. Taxono ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polychaete
Polychaeta () is a paraphyletic class (biology), class of generally marine invertebrate, marine annelid worms, common name, 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 Alitta virens, sandworm or Alitta succinea, 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 (underwater vehicle), ''Nereus'' at the bottom of the Challenger Deep, the deepes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Family (biology)
Family ( la, familia, plural ') is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between order and genus. A family may be divided into subfamilies, which are intermediate ranks between the ranks of family and genus. The official family names are Latin in origin; however, popular names are often used: for example, walnut trees and hickory trees belong to the family Juglandaceae, but that family is commonly referred to as the "walnut family". What belongs to a family—or if a described family should be recognized at all—are proposed and determined by practicing taxonomists. There are no hard rules for describing or recognizing a family, but in plants, they can be characterized on the basis of both vegetative and reproductive features of plant species. Taxonomists often take different positions about descriptions, and there may be no broad consensus across the scientific community for some time. The publishing of new data and opini ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
