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Ophryotrocha Magnadentata
''Ophryotrocha magnadentata'' is a species of polychaete worm, first found on deep sea whale fall and wood fall habitats in the north-east Pacific, off the southern Californian coast. This species and ''Ophryotrocha longicollaris'' are sister species; together with '' O. nauarchus'' and '' O. flabella'', it falls in a clade including '' O. globopalpata'' and '' Exallopus jumarsi'' from the shallow North Atlantic The Atlantic Ocean is the second-largest of the world's five oceans, with an area of about . It covers approximately 20% of Earth's surface and about 29% of its water surface area. It is known to separate the "Old World" of Africa, Europe an .... References Further reading *Ravara, Ascensão, et al. "First account on the diversity of Ophryotrocha (Annelida, Dorvilleidae) from a mammal-fall in the deep-Atlantic Ocean with the description of three new species." Systematics and Biodiversity 13.6 (2015): 555-570. *Wiklund, Helena. Evolution of annelid diversity at w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animalia
Animals are multicellular, eukaryotic organisms in the biological kingdom Animalia. With few exceptions, animals consume organic material, breathe oxygen, are able to move, can reproduce sexually, and go through an ontogenetic stage in which their body consists of a hollow sphere of cells, the blastula, during embryonic development. Over 1.5 million living animal species have been described—of which around 1 million are insects—but it has been estimated there are over 7 million animal species in total. Animals range in length from to . They have 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#Bilateral symmetry, bilaterally symmetric body plan. The Bilateria include the protostomes, containing animals such as nematodes, arthropods, flatworms, annelids and molluscs, and th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ophryotrocha Longicollaris
''Ophryotrocha longicollaris'' is a species of polychaete worm, first found on deep sea whale fall and wood fall habitats in the north-east Pacific Ocean, Pacific, off the southern Californian coast. This species and ''Ophryotrocha magnadentata'' are sister species; together with ''Ophryotrocha nauarchus, O. nauarchus'' and ''Ophryotrocha flabella, O. flabella'', it falls in a clade including ''Ophryotrocha globopalpata, O. globopalpata'' and ''Exallopus jumarsi'' from the shallow North Atlantic Ocean, Atlantic. References Further reading *Ravara, Ascensão, et al. "First account on the diversity of Ophryotrocha (Annelida, Dorvilleidae) from a mammal-fall in the deep-Atlantic Ocean with the description of three new species." Systematics and Biodiversity 13.6 (2015): 555-570. *Wiklund, Helena. Evolution of annelid diversity at whale-falls and other marine ephemeral habitats. 2009. External links *WORMS Polychaetes {{Annelid-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Exallopus Jumarsi
''Exallopus'' is a genus of polychaetes belonging to the family Dorvilleidae Dorvilleidae is a family of polychaetes belonging to the order Eunicida Eunicida is an order of polychaete worms. Characteristics Members of this order have an elongated, segmented body and a distinct head, normally with a separate peristomiu .... The species of this genus are found in Northern America. Species: *'' Exallopus blakei'' *'' Exallopus cropion'' *'' Exallopus intermedia'' *'' Exallopus jumarsi'' *'' Exallopus pentadiaphorus'' References {{Taxonbar, from=Q3918081 Annelids ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ophryotrocha Globopalpata
''Ophryotrocha'' is a genus of marine polychaete worms in the family Dorvilleidae. Species The World Register of Marine Species lists the following species in the genus : *'' Ophryotrocha adherens'' Paavo, Bailey-Brock & Akesson, 2000 *''Ophryotrocha akessoni'' Blake, 1985 *''Ophryotrocha alborana'' Paxton & Åkesson, 2011 *'' Ophryotrocha antarctica'' Szaniawski & Wrona, 1987 *'' Ophryotrocha atlantica'' Hilbig & Blake, 1991 *''Ophryotrocha baccii'' Parenti, 1961 *''Ophryotrocha batillus'' Wiklund et al., 2012 *''Ophryotrocha bifida'' Hilbig & Blake, 1991 *''Ophryotrocha birgittae'' Paxton & Åkesson, 2011 *''Ophryotrocha cantabrica'' Núñez, Riera & Maggio, 2014 *''Ophryotrocha claparedei'' Studer, 1878 *''Ophryotrocha clava'' Taboada, Wiklund, Glover, Dahlgren, Cristobo & Avila, 2013 *''Ophryotrocha cosmetandra'' Oug, 1990 *''Ophryotrocha costlowi'' Paxton & Åkesson, 2010 *''Ophryotrocha craigsmithi'' Wiklund, Glover & Dahlgren, 2009 *''Ophryotrocha cyclops'' Salvo, Wiklund ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clade
A clade (), also known as a monophyletic group or natural group, is a group of organisms that are monophyletic – that is, composed of a common ancestor and all its lineal descendants – on a phylogenetic tree. Rather than the English term, the equivalent Latin term ''cladus'' (plural ''cladi'') is often used in taxonomical literature. The common ancestor may be an individual, a population, or a species (extinct or extant). Clades are nested, one in another, as each branch in turn splits into smaller branches. These splits reflect evolutionary history as populations diverged and evolved independently. Clades are termed monophyletic (Greek: "one clan") groups. Over the last few decades, the cladistic approach has revolutionized biological classification and revealed surprising evolutionary relationships among organisms. Increasingly, taxonomists try to avoid naming taxa that are not clades; that is, taxa that are not monophyletic. Some of the relationships between org ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ophryotrocha Flabella
''Ophryotrocha flabella'' is a species of polychaete worm, first found on deep sea whale fall and wood fall habitats in the north-east Pacific, off the southern Californian coast. It is similar to '' Ophryotrocha globopalpata'', possessing some morphological differences, although genetic divergence Genetic divergence is the process in which two or more populations of an ancestral species accumulate independent genetic changes (mutations) through time, often leading to reproductive isolation and continued mutation even after the populations hav ... is low between them. References Further reading *Ravara, Ascensão, et al. "First account on the diversity of Ophryotrocha (Annelida, Dorvilleidae) from a mammal-fall in the deep-Atlantic Ocean with the description of three new species." Systematics and Biodiversity 13.6 (2015): 555-570. *Wiklund, Helena. Evolution of annelid diversity at whale-falls and other marine ephemeral habitats. 2009. External links *WORMS Polychaetes [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ophryotrocha Nauarchus
''Ophryotrocha nauarchus'' is a species of polychaete worm, first found on deep sea whale fall and wood fall habitats in the north-east Pacific, off the southern Californian coast. The species is sexually dimorphic Sexual dimorphism is the condition where the sexes of the same animal and/or plant species exhibit different morphological characteristics, particularly characteristics not directly involved in reproduction. The condition occurs in most ani ..., males having appendages on their first chaetiger. References Further reading *Ravara, Ascensão, et al. "First account on the diversity of Ophryotrocha (Annelida, Dorvilleidae) from a mammal-fall in the deep-Atlantic Ocean with the description of three new species." Systematics and Biodiversity 13.6 (2015): 555-570. *Wiklund, Helena. Evolution of annelid diversity at whale-falls and other marine ephemeral habitats. 2009. External links *WORMS Polychaetes {{Annelid-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sister Species
In phylogenetics, a sister group or sister taxon, also called an adelphotaxon, comprises the closest relative(s) of another given unit in an evolutionary tree. Definition The expression is most easily illustrated by a cladogram: Taxon A and taxon B are sister groups to each other. Taxa A and B, together with any other extant or extinct descendants of their most recent common ancestor (MRCA), form a monophyletic group, the clade AB. Clade AB and taxon C are also sister groups. Taxa A, B, and C, together with all other descendants of their MRCA form the clade ABC. The whole clade ABC is itself a subtree of a larger tree which offers yet more sister group relationships, both among the leaves and among larger, more deeply rooted clades. The tree structure shown connects through its root to the rest of the universal tree of life. In cladistic standards, taxa A, B, and C may represent specimens, species, genera, or any other taxonomic units. If A and B are at the same taxono ... [...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 [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Whale Fall
A whale fall occurs when the carcass of a whale has fallen onto the ocean floor at a depth greater than , in the bathyal or abyssal zones. On the sea floor, these carcasses can create complex localized ecosystems that supply sustenance to deep-sea organisms for decades. This is unlike in shallower waters, where a whale carcass will be consumed by scavengers over a relatively short period of time. Whale falls were first observed in the late 1970s with the development of deep-sea robotic exploration. Since then, several natural and experimental whale falls have been monitored through the use of observations from submersibles and remotely operated underwater vehicles (ROVs) in order to understand patterns of ecological succession on the deep seafloor. Deep sea whale falls are thought to be hotspots of adaptive radiation for specialized fauna. Organisms that have been observed at deep-sea whale fall sites include octopus, giant isopods, squat lobsters, polychaetes, prawns, shr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polychaete
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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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