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Thelepus Cincinnatus
''Thelepus cincinnatus'' is a species of Polychaeta, polychaete Annelida, annelids in the family Terebellidae (spaghetti worms), which can be found inhabiting a tube of secrete on rocks and shells. The worm is widely distributed, and can be found in almost any region of the oceans at depths ranging from 10 to 4000 meters. Morphology Anteriorly, ''T. cincinnatus'' has several long feeding tentacles and two pairs of filiform branchia. The ventral lobes are thick and many eye spots can be seen. Notochaetae can be observed from the segment where the second branchia occurs, and uncini occur from the third segment. The worm itself is pink orange or brown with lighter colouration on the ventral side. The tentacles show the same colour variation as the body, but can include red pigment spots while the branchia are a deep red. The number of body segments is not predetermined but can exceed 100 while the total length of the animal can reach 200 mm.Kirkegaard, J. B. Danmarks Fauna 86, H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Otto Fabricius
Otto Fabricius (6 March 174420 May 1822) was a Danish missionary, naturalist, ethnographer, and explorer of Greenland. Biography Otto Fabricius was born in Rudkøbing on the island of Langeland, Denmark, where his father was a rector. In his youth, he was educated largely at home by tutors. In 1762, he was matriculated at the University of Copenhagen. In 1765, he was admitted to the Greenland Mission Seminary (''Seminarium Groenlandicum''), where he attended classes taught by Poul Egede. In 1768 he graduated with a degree in divinity. He was sent as a missionary to the southwestern coast of Greenland from 1768 to 1773. During this period, he made enormous amounts of observations and collections. His laboratory was an Inuit house made of turf. His only artificial light was an oil lamp. He had a few magnifying glasses and only one book was in his library, Linnaei Systema Naturae by Carl Linnaeus. Nevertheless, he made enough zoological observation to be able to publish ''Fauna ... [...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] |
Terebellidae
The Terebellidae is a marine family of polychaete worms, of which the type taxon is ''Terebella'', described by Carl Linnaeus in his 1767 12th edition of ''Systema Naturae''. Characteristics Most terebellids live in burrows or crevices and are often of large size, ranging up to 150 millimetres in length and 15 millimetres in width. The numerous, very long tentacles which radiate from near the mouth are used for finding and collecting food particles from the sediment surface. The tentacles are not retractable as is the case in the ampharetids. They have plump anterior bodies and numerous segments in their long, tapered posterior bodies, whereas ampharetids are more compact. They have branched gills laterally on up to three anterior chaetigers but in the subfamily Thelepodinae the gills are numerous simple filaments. The mid-body chaetigers are in double rows in the subfamily Terebellinae. In the subfamily Polycirrinae, the gills are absent and the prostomium is expanded as a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marine Snow
In the deep ocean, marine snow (also known as "ocean dandruff") is a continuous shower of mostly organic detritus falling from the upper layers of the water column. It is a significant means of exporting energy from the light-rich photic zone to the aphotic zone below, which is referred to as the biological pump. Export production is the amount of organic matter produced in the ocean by primary production that is not recycled ( remineralised) before it sinks into the aphotic zone. Because of the role of export production in the ocean's biological pump, it is typically measured in units of carbon (e.g. mg C m−2 d−1). The term was first coined by the explorer William Beebe as he observed it from his bathysphere. As the origin of marine snow lies in activities within the productive photic zone, the prevalence of marine snow changes with seasonal fluctuations in photosynthetic activity and ocean currents. Marine snow can be an important food source for organisms living in th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canalipalpata
Canalipalpata, also known as bristle-footed annelids or fan-head worms, is an order of polychaete worms, with 31 families in it including the suborder Sabellida (families Serpulidae (tubeworms) and Sabellidae (fanworms and feather duster worms) and the Alvinellidae, a family of deep-sea worms associated with hydrothermal vents. The Canalipalpata have no teeth or jaws. Most are filter feeders. They have grooved palpi, which are covered in cilia. These cilia are used to transport food particles to the mouth. However, the cilia and grooves have been lost in the Siboglinidae family. Fossil record The earliest known member of the Canalipalpata is '' Terebellites franklini'', which was found in the Clouds Rapids Formation of Newfoundland, and dates from the mid Cambrian (St David's series). Use in aquaria Many species of Canalipalpata are visually attractive. Fanworms and Christmas tree worms (a type of serpulid) are recommended as species for beginners to keep in a marine aquar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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