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Aphelochaeta Zebra
''Aphelochaeta zebra'' is a species of bitentaculate cirratulidan first found in the Pacific coast of Costa Rica, at a coral reef in Golfo Dulce. It is characterised by possessing an expanded posterior end and by its darkly-staining intersegmental regions (via methyl green Methyl green (CI 42585) is a cationic or positive charged stain, related to Ethyl Green, that has been used for staining DNA since the 19th century. It has been used for staining cell nuclei either as a part of the classical Unna-Pappenheim sta ... staining).Dean, Harlan K., and James A. Blake. "Aphelochaeta (Polychaeta: Cirratulidae) from the Pacific coast of Costa Rica, with a description of five new species." Zootaxa 4103.2 (2016): 101-116. References Terebellida {{Annelid-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animal
Animals are multicellular, eukaryotic organisms in the Kingdom (biology), biological kingdom Animalia. With few exceptions, animals Heterotroph, consume organic material, Cellular respiration#Aerobic respiration, breathe oxygen, are Motility, able to move, can Sexual reproduction, reproduce sexually, and go through an ontogenetic stage in which their body consists of a hollow sphere of Cell (biology), cells, the blastula, during Embryogenesis, embryonic development. Over 1.5 million Extant taxon, living animal species have been Species description, described—of which around 1 million are Insecta, insects—but it has been estimated there are over 7 million animal species in total. Animals range in length from to . They have Ecology, complex interactions with each other and their environments, forming intricate food webs. The scientific study of animals is known as zoology. Most living animal species are in Bilateria, a clade whose members have a Symmetry in biology#Bilate ... [...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] |
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] |
Terebellida
Terebellida make up an order of the Polychaeta class, commonly referred to as "bristle worms". Together with the Sabellida, the Spionida and some enigmatic families of unclear taxonomic relationship (e.g. the Saccocirridae), they make up the subclass Canalipalpata, one of the three main clades of polychaetes. Like most polychaetes, almost all members of the ''Terebellida'' are marine organisms. Most are small, sessile detritivores (deposit feeders) which live in small tubes they build from mud or similar substrate, or burrow in the sand. Their central nervous system displays characteristic apomorphies. Systematics There is little consensus on the number of families. Some treatments accept as little as five, while other authors list over a dozen. Here, the more inclusive view of the Terebellida is followed, based on a major review of polychaete systematics. Cladistic studies have hitherto only analyzed a rather small proportion of polychaetes; hence it may be that some of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cirratulidae
Cirratulidae is a family of marine polychaete worms. Members of the family are found worldwide, mostly living in mud or rock crevices. Most are deposit feeders, but some graze on algae or are suspension feeders. Description Cirratulids vary in size from one to twenty centimetres long. They are mostly burrowers in soft sediments but some live in rock crevices. The head is conical or wedge-shaped and has no antennae. The body is generally cylindrical, tapering at both ends. Cirratulids are characterised by a large number of simple elongate filaments along the body. Some of these occur as an anterior cluster of tentacles, grooved for deposit-feeding, but the majority, the branchiae, are found one pair per segment, and do not have grooves. The chaetae (bristles) are simple capillaries, usually with hooks, and emerge directly from the body wall. There are no anal cirri (slender sensory appendages). The worm is usually buried with only the writhing branchial filaments visible. Some ci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aphelochaeta
Aphelochaeta is a genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nom ... of bitentaculate cirratulidan, or two-tentacled marine worms. Species * '' A. antelonga'' Dean & Blake, 2016 * '' A. arizonae'' Magalhaes & Bailey-Brock, 2013 * '' A. caribbeanensis'' Blake & Dean, 2019 * '' A. guimondi'' Dean & Blake, 2016 * '' A. honouliuli'' Magalhaes & Bailey-Brock, 2013 * '' A. praeacuta'' Dean & Blake, 2016 * '' A. saipanensis'' Magalhaes & Bailey-Brock, 2013 * '' A. striata'' Dean & Blake, 2016 * '' A. zebra'' Dean & Blake, 2016 References External linksWORMS Terebellida {{Annelid-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pacific Ocean
The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south, and is bounded by the continents of Asia and Oceania in the west and the Americas in the east. At in area (as defined with a southern Antarctic border), this largest division of the World Ocean—and, in turn, the hydrosphere—covers about 46% of Earth's water surface and about 32% of its total surface area, larger than Earth's entire land area combined .Pacific Ocean . '' Britannica Concise.'' 2008: Encyclopædia Britannica, Inc. The centers of both the |
Golfo Dulce, Costa Rica
Golfo Dulce () is a gulf in Costa Rica, located at the south of the Province of Puntarenas. The inlet starts on the Pacific Ocean side of Costa Rica and extends slightly northward before turning west. The most westward part is at the city of Rincon. The bay separates the Osa Peninsula from the mainland Costa Rica. Protected areas In the northeast part of the gulf is the Piedras Blancas National Park (former Corcovado National Park extension), with its of protected rainforest. The tropical lowland wet forest is one of the most threatened and least studied types of vegetation. The Piedras Blancas National Park was established in 1992 as an extension of the Corcovado National Park, in the Osa Peninsula, to which it is connected by a forest corridor which ensures biodiversity and self-sustaining ecological and evolutionary processes between wildlife populations. There are a few lodging facilities surrounded by the park, including Golfo Dulce Retreat, accessible only by boat. I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Methyl Green
Methyl green (CI 42585) is a cationic or positive charged stain, related to Ethyl Green, that has been used for staining DNA since the 19th century. It has been used for staining cell nuclei either as a part of the classical Unna-Pappenheim stain, or as a nuclear counterstain ever since. In recent years, its fluorescent properties when bound to DNA have positioned it useful for far-red imaging of live cell nuclei. Fluorescent DNA staining is routinely used in cancer prognosis. Methyl green also emerges as an alternative stain for DNA in agarose gels, fluorometric assays and flow cytometry. It has also been shown that it can be used as an exclusion viability stain for cells. Its interaction with DNA has been shown to be non-intercalating, in other words not inserting itself into the DNA, but instead electrostatic with the DNA major groove. It is used in combination with pyronin in the methyl green–pyronin stain which stains and differentiates DNA and RNA. When excited at ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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