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Stylophthalmus
''Stylophthalmus'' (meaning 'stem-eye') was a name used for what was previously believed to be a genus of fish with eyes perched upon Stylophthalmine trait, periscopic stalks, known in some cases to be almost one third of the length of the animal's actual body. It is now recognised that all species in this genus are the fish larvae of already named, distantly related fish in the orders Stomiiformes and Myctophiformes which may have developed this same trait as a result of convergent evolution. Thus, ''Stylophthalmus'' is an Valid name (zoology), invalid name. Species * ''Stylophthalmus lobiancoi'', Mazzarelli, 1909, now recognised as a junior synonym of ''Myctophum punctatum'', Rafinesque, 1810 * ''Stylophthalmus mediterraneus'', Mazzarelli, 1810, now recognised as a junior synonym of ''Symbolophorus veranyi'', Moreau, 1888 *''Stylophthalmus paradoxus'', Brauer, 1902, now recognised as a junior synonym of ''Idiacanthus fasciola'', Peters, 1877 References {{Reflist Marine fis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Idiacanthus Fasciola
The ribbon sawtail fish, ''Idiacanthus fasciola'', is a barbeled dragonfish of the family Stomiidae Stomiidae is a family of deep-sea ray-finned fish, including the barbeled dragonfishes. They are quite small, usually around 15 cm, up to 26 cm. These fish are apex predators and have enormous jaws filled with fang-like teeth. They are ..., found around the world at depths over 500 m between latitudes 40° N and 54° S. Length is up to 35 cm in general for the female, and 15 cm for the male. References * * Tony Ayling & Geoffrey Cox, ''Collins Guide to the Sea Fishes of New Zealand'', (William Collins Publishers Ltd, Auckland, New Zealand 1982) *https://archive.today/20130212144646/http://filaman.uni-kiel.de/LarvalBase/Summary/LarvaSummary.cfm?genusname=Idiacanthus&speciesname=fasciola Stomiidae Taxa named by Wilhelm Peters Fish described in 1877 {{Stomiiformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Idiacanthus Fasciola1
''Idiacanthus'' is a genus of barbeled dragonfishes, the larvae of which are noted for exhibiting the Stylophthalmine trait. Species There are currently three recognized species in this genus: * '' Idiacanthus antrostomus'' C. H. Gilbert, 1890 (Pacific blackdragon) * ''Idiacanthus atlanticus'' A. B. Brauer, 1906 (Black dragonfish) * '' Idiacanthus fasciola'' W. K. H. Peters, 1877 (Ribbon sawtail fish) Ecology Distribution and habitat Members of this genus have been found from the mesopelagic zone to the bathypelagic zone. ''Idiacanthus atlanticus'' is found in subtropical to temperate habitats, mainly in the southern hemisphere. ''Idiacanthus fasciola'' is more widely distributed, found in both North and South Atlantic as well as the Indo-Pacific and other areas. ''Idiacanthus antrostomus'' is mainly found in the Eastern Pacific. Reproduction The average fertile ''Idiacanthus fasciola'' female is known to hold approximately 14,000 eggs. Eggs found in the ovaries’ ant ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stylophthalmine Trait
The Stylophthalmine trait is an adaptation present in the larvae of several different species of actinopterygian fish. It is characterised by the development of elliptically shaped eyes, which are situated at the apex of long periscopic stalks extending from the larva's head. Stylophthalmine can be used as a general term to describe such larvae.King, D. (2014), "Looking through the deep - The Stylophthalmines and their amazing eyestalks", Life Nature Magazine, Jun 14, pp.18-19. The trait has developed as a result of convergent evolution at least 4 times in different groups of fish; twice in the family Myctophidae (in species of '' Myctophum'' and '' Symbolophorus''), and also in the families Stomiidae (genus ''Idiacanthus''), and Bathylagidae (''Bathylagus''). The work of Weihhs and Moser (1981) showed that the eye's elliptical shape allows a stylophthalmine to dramatically enlarge its field of view The field of view (FoV) is the extent of the observable world that is se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fish Larvae
Ichthyoplankton (from Greek: ἰχθύς, , "fish"; and πλαγκτός, , "drifter") are the eggs and larvae of fish. They are mostly found in the sunlit zone of the water column, less than 200 metres deep, which is sometimes called the epipelagic or photic zone. Ichthyoplankton are planktonic, meaning they cannot swim effectively under their own power, but must drift with the ocean currents. Fish eggs cannot swim at all, and are unambiguously planktonic. Early stage larvae swim poorly, but later stage larvae swim better and cease to be planktonic as they grow into juveniles. Fish larvae are part of the zooplankton that eat smaller plankton, while fish eggs carry their own food supply. Both eggs and larvae are themselves eaten by larger animals. Fish can produce high numbers of eggs which are often released into the open water column. Fish eggs typically have a diameter of about . The newly hatched young of oviparous fish are called larvae. They are usually poorly formed, c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stomiiformes
Stomiiformes is an order of deep-sea ray-finned fishes of very diverse morphology. It includes, for example, dragonfishes, lightfishes (Gonostomatidae and Phosichthyidae), loosejaws, marine hatchetfishes and viperfishes. The order contains 4 families (5 according to some authors) with more than 50 genera and at least 410 species. As usual for deep-sea fishes, there are few common names for species of the order, but the Stomiiformes as a whole are often called dragonfishes and allies or simply stomiiforms. The scientific name means "''Stomias''-shaped", from '' Stomias'' (the type genus) + the standard fish order suffix "-formes". It ultimately derives from Ancient Greek ''stóma'' (στόμᾶ, "mouth") + Latin ''forma'' ("external form"), the former in reference to the huge mouth opening of these fishes. Description and ecology Members of this order are mostly pelagic fishes living in deep oceanic waters. Their distribution around the world's oceans is very wide, ranging ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Myctophiformes
The Myctophiformes are an order of ray-finned fishes consisting of two families of deep-sea marine fish, most notably the highly abundant lanternfishes (Myctophidae). The blackchins (Neoscopelidae) contain six species in three genera, while the bulk of the family belongs to the Myctophidae, with over 30 genera and some 252 species.Nelson (2006): p.223 The scientific name ultimately derives from Ancient Greek ''myktér'' (μυκτήρ, "nose") + ''óphis'' (ὄφῖς, "serpent") + Latin ''forma'' ("external form"), the Greek part in reference to the long, slender, and heavy-headed shape of these fishes. Description and ecology These smallish fishes inhabit the pelagic and benthopelagic zones of the deep sea. They are laterally compressed and usually have photophores (light organs). The eyes are large, in some decidedly huge, and generally directed straight sideways. The mouth also quite large and located at the tip of the snout; its gape extends to below the eyes or even beyon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Convergent Evolution
Convergent evolution is the independent evolution of similar features in species of different periods or epochs in time. Convergent evolution creates analogous structures that have similar form or function but were not present in the last common ancestor of those groups. The cladistic term for the same phenomenon is homoplasy. The recurrent evolution of flight is a classic example, as flying insects, birds, pterosaurs, and bats have independently evolved the useful capacity of flight. Functionally similar features that have arisen through convergent evolution are ''analogous'', whereas '' homologous'' structures or traits have a common origin but can have dissimilar functions. Bird, bat, and pterosaur wings are analogous structures, but their forelimbs are homologous, sharing an ancestral state despite serving different functions. The opposite of convergence is divergent evolution, where related species evolve different traits. Convergent evolution is similar to parallel evo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valid Name (zoology)
In zoological nomenclature, the valid name of a taxon is the sole correct scientific name. The valid name should be used for that taxon, instead of any other name that may currently be being used, or may previously have been used. A name is valid when, and only when, it is in harmony with all the relevant rules listed in the International Code of Zoological Nomenclature (ICZN). A valid name is the correct zoological name of a taxon. In contrast, a name which violates the rules of the ICZN is known as an invalid name. An invalid name is not considered to be the correct scientific name for a taxon. There are numerous different kinds of invalid names. Subjectively invalid names Subjectively invalid names are names that have been rendered invalid by individual scientific judgement or opinion. Taxonomists may differ in their opinion, and names considered invalid by one researcher may be considered valid by another; thus these are still potentially valid names. They include: :*J ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Myctophum Punctatum
''Myctophum punctatum'' is a species of mesopelagic fish in the family Myctophidae. Its common name is spotted lanternfish, sometimes spelled spotted lanterfish. It is found in the Northern Atlantic and in the Mediterranean at depths down to 1000m. It is one of the dominant species in midwater assemblages near the Mid-Atlantic Ridge. ''Myctophum punctatum'' can grow to SL. It performs diurnal migrations to the surface at dusk. It feeds mostly on copepods and euphausiid Krill are small crustaceans of the order Euphausiacea, and are found in all the world's oceans. The name "krill" comes from the Norwegian word ', meaning "small fry of fish", which is also often attributed to species of fish. Krill are consi ...s. Larvae of ''Myctophum punctatum'' have stalked eyes. References Myctophidae Fish of the Atlantic Ocean Fish of the Mediterranean Sea Fish described in 1810 Taxa named by Constantine Samuel Rafinesque {{Myctophiformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marine Fish
Saltwater fish, also called marine fish or sea fish, are fish that live in seawater. Saltwater fish can swim and live alone or in a large group called a school. Saltwater fish are very commonly kept in aquariums for entertainment. Many saltwater fish are also caught to be eaten, or grown in aquaculture. However, many fish species have been overfished and are otherwise threatened by marine pollution or ecological changes caused by climate change. Diet Fishes that live in the ocean can be carnivores, herbivores, or omnivores. Herbivores in the ocean eat things such as algae and flowering seagrasses. Many herbivores' diets consist of primarily algae. Most saltwater fish will eat both macroalgae and microalgae. Many fish eat red, green, brown, and blue algae, but some fish prefer certain types. Most saltwater fish that are carnivores will never eat algae under any circumstances. Carnivores' diets consist of shrimp, plankton, or tiny crustaceans. Captivity Saltwater aquariums are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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