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Leptochilichthys
''Leptochilichthys'' is a genus of fishes containing four species. ''Leptochilichthys'' is the only genus in the former family Leptochilichthyidae but is now included within the broader family Alepocephalidae.R. Betancur-Rodriguez, E. Wiley, N. Bailly, A. Acero, M. Miya, G. Lecointre, G. Ortí''Phylogenetic Classification of Bony Fishes – Version 4''(2016) Its name derives from the Greek λεπτός (''leptos'', "small"); χεῖλος (''cheilos'', "lip"); and ἰχθύς (''ichthys'', "fish"). Species The currently recognized species in this genus are: * '' Leptochilichthys agassizii'' ( Garman, 1899) (Agassiz' smooth-head) * '' Leptochilichthys microlepis'' ( Machida & Shiogaki, 1988) (smallscale smooth-head) * '' Leptochilichthys pinguis'' ( Vaillant, 1886) (Vaillant's smooth-head) Description Species in genus ''Leptochilichthys'' have toothless maxillae. The maxillae are considered especially long There are teeth on the palate and dentary. Many long gill rakers are a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leptochilichthys Agassizii
''Leptochilichthys agassizii'', or Agassiz' smooth-head, is a species of fish in the family Alepocephalidae. It is named for the scientist and engineer Alexander Agassiz (1835–1910), who commanded the 1899 survey aboard the USS ''Albatross'' on which the fish was discovered. Description ''Leptochilichthys agassizii'' is brownish in colour, with a large head. Its maximum length is . It has large scales, with 47–52 in its lateral line. Habitat ''Leptochilichthys agassizii'' lives in the Atlantic Ocean, Indian Ocean and Pacific Ocean; it is bathypelagic The bathypelagic zone or bathyal zone (from Greek βαθύς (bathýs), deep) is the part of the open ocean that extends from a depth of below the ocean surface. It lies between the mesopelagic above and the abyssopelagic below. The bathypela ..., living at depths of . Reproduction It lays large eggs, up to in diameter. References agassizii Fish described in 1899 Taxa named by Samuel Garman {{Alepocephali ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leptochilichthys
''Leptochilichthys'' is a genus of fishes containing four species. ''Leptochilichthys'' is the only genus in the former family Leptochilichthyidae but is now included within the broader family Alepocephalidae.R. Betancur-Rodriguez, E. Wiley, N. Bailly, A. Acero, M. Miya, G. Lecointre, G. Ortí''Phylogenetic Classification of Bony Fishes – Version 4''(2016) Its name derives from the Greek λεπτός (''leptos'', "small"); χεῖλος (''cheilos'', "lip"); and ἰχθύς (''ichthys'', "fish"). Species The currently recognized species in this genus are: * '' Leptochilichthys agassizii'' ( Garman, 1899) (Agassiz' smooth-head) * '' Leptochilichthys microlepis'' ( Machida & Shiogaki, 1988) (smallscale smooth-head) * '' Leptochilichthys pinguis'' ( Vaillant, 1886) (Vaillant's smooth-head) Description Species in genus ''Leptochilichthys'' have toothless maxillae. The maxillae are considered especially long There are teeth on the palate and dentary. Many long gill rakers are a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leptochilichthys Pinguis
Vaillant's smooth-head (''Leptochilichthys pinguis'') is a species of deepwater marine ray-finned fish belonging to the family Alepocephalidae, the smooth-heads. This species is found in the Atlantic Indian and Western Pacific Oceans. Taxonomy Vaillant's smooth-head was first formally described as ''Anomalopterus pinguis'' in 1886 by the French zoologist Léon Vaillant with its type locality given as off "Cape Blanc" off Morocco at a depth of . This species is currently classified in the genus ''Leptochilichthys'' within the family Alepocephalidae in the order Alepocephaliformes. Etymology Vaillan's smooth-head is in the genus ''Leptochilichthys'', a name which is a combination of ''leptos'', which means "thin", ''cheilos'', which means "lip", and ''ichthys'', meaning "fish". The "thin lip" part is thought to refer to the slender maxilla and intermaxilla of the type species of the genus, '' L. agassizii''. The specific name, ''pinguis'', means "fat", a reference to fold or cush ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alepocephalidae
Slickheads, also known as nakedheads or smoothheads, are deep water fishes that belong to the family Alepocephalidae. They are most commonly found in the bathypelagic layer, which is approximately 3000m below the surface. They get their name from the lack of scales on their heads. Similarly, the scientific name is from the Greek ᾰ̓- (''a''-, "not"); λέπος (''lepos'', "scale"); and κεφαλή (''kephalē'', "head"). It has about 22 genera with ca. 96 species. The only known fossil genus is ''Carpathichthys'' from the Rupelian, Early Oligocene of Poland, although an undescribed species of ''Bathyprion'' and several indeterminate taxa are also known from the same formation. Fossil Otolith, otoliths are also known, dating to the Ypresian, Early Eocene. Genera Alepocephalidae contains the following extant genera: * ''Alepocephalus'' Antoine Risso, Risso, 1820 * ''Asquamiceps'' Erich Zugmayer, Zugmayer, 1911 * ''Aulastomatomorpha'' Alfred William Alcock, Alcock, 1890 * ''Baj ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Samuel Garman
Samuel Walton Garman (June 5, 1843 – September 30, 1927), or "Garmann" as he sometimes styled himself, was an American naturalist and zoologist. He became noted as an ichthyologist and herpetologist. Biography Garman was born in Indiana County, Pennsylvania, on 5 June 1843. In 1868 he joined an expedition to the American West with John Wesley Powell. He graduated from the Illinois State Normal University in 1870, and for the following year was principal of the Mississippi State Normal School. In 1871, he became professor of natural sciences in Ferry Hall Seminary, Lake Forest, Illinois, and a year later became a special pupil of Louis Agassiz. He was a friend and regular correspondent of the naturalist Edward Drinker Cope, and in 1872 accompanied him on a fossil hunting trip to Wyoming. In 1870 he became assistant director of herpetology and ichthyology at Harvard's Museum of Comparative Zoology. His work was mostly in the classification of fish, especially sharks, but ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lateral Line
The lateral line, also called the lateral line organ (LLO), is a system of sensory organs found in fish, used to detect movement, vibration, and pressure gradients in the surrounding water. The sensory ability is achieved via modified epithelial cells, known as hair cells, which respond to displacement caused by motion and transduce these signals into electrical impulses via excitatory synapses. Lateral lines play an important role in schooling behavior, predation, and orientation. Early in the evolution of fish, some of the sensory organs of the lateral line were modified to function as the electroreceptors called ampullae of Lorenzini. The lateral line system is ancient and basal to the vertebrate clade, as it is found in fishes that diverged over 400 million years ago. Function The lateral line system allows the detection of movement, vibration, and pressure gradients in the water surrounding an animal. It plays an essential role in orientation, predation, and fish ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ray-finned Fish Genera
Actinopterygii (; ), members of which are known as ray-finned fish or actinopterygians, is a class (biology), class of Osteichthyes, bony fish that comprise over 50% of living vertebrate species. They are so called because of their lightly built fish fin, fins made of webbings of skin supported by radially extended thin bony spine (zoology), spines called ''lepidotrichia'', as opposed to the bulkier, fleshy lobed fins of the sister taxon, sister clade Sarcopterygii (lobe-finned fish). Resembling folding fans, the actinopterygian fins can easily change shape and wetted area, providing superior thrust-to-weight ratios per movement compared to sarcopterygian and chondrichthyian fins. The fin rays attach directly to the proximal or basal skeletal elements, the radials, which represent the articulation (anatomy), articulation between these fins and the internal skeleton (e.g., pelvic and pectoral girdles). The vast majority of actinopterygians are teleosts. By species count, they domi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bathypelagic Fish
Pelagic fish live in the pelagic zone of ocean or lake waters—being neither close to the bottom nor near the shore—in contrast with demersal fish that live on or near the bottom, and reef fish that are associated with coral reefs. The marine pelagic environment is the largest aquatic habitat on Earth, occupying 1,370 million cubic kilometres (330 million cubic miles), and is the habitat for 11% of known fish species. The oceans have a mean depth of . About 98% of the total water volume is below , and 75% is below . Moyle and Cech, p. 585 Marine pelagic fish can be divided into coastal (inshore) fish and oceanic (offshore) fish. Coastal pelagic fish inhabit the relatively shallow and sunlit waters above the continental shelf, while oceanic pelagic fish inhabit the vast and deep waters beyond the continental shelf (even though they also may swim inshore). Pelagic fish range in size from small coastal forage fish, such as herrings and sardines, to large apex predato ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pacific
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 the definition, to Antarctica in the south, and is bounded by the continents of Asia and Australia in the west and the Americas in the east. At in area (as defined with a southern Antarctic border), the Pacific Ocean is the largest division of the World Ocean and the hydrosphere and covers approximately 46% of Earth's water surface and about 32% of the planet's total surface area, larger than its entire land area ().Pacific Ocean . '' Britannica Concise.'' 2008: Encyclopædia Britannica, Inc. The centers of both the [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indian Ocean
The Indian Ocean is the third-largest of the world's five oceanic divisions, covering or approximately 20% of the water area of Earth#Surface, Earth's surface. It is bounded by Asia to the north, Africa to the west and Australia (continent), Australia to the east. To the south it is bounded by the Southern Ocean or Antarctica, depending on the definition in use. The Indian Ocean has large marginal or regional seas, including the Andaman Sea, the Arabian Sea, the Bay of Bengal, and the Laccadive Sea. Geologically, the Indian Ocean is the youngest of the oceans, and it has distinct features such as narrow continental shelf, continental shelves. Its average depth is 3,741 m. It is the warmest ocean, with a significant impact on global climate due to its interaction with the atmosphere. Its waters are affected by the Indian Ocean Walker circulation, resulting in unique oceanic currents and upwelling patterns. The Indian Ocean is ecologically diverse, with important ecosystems such ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atlantic
The Atlantic Ocean is the second largest of the world's five oceanic divisions, with an area of about . It covers approximately 17% of Earth's surface and about 24% of its water surface area. During the Age of Discovery, it was known for separating the New World of the Americas (North America and South America) from the Old World of Afro-Eurasia (Africa, Asia, and Europe). Through its separation of Afro-Eurasia from the Americas, the Atlantic Ocean has played a central role in the development of human society, globalization, and the histories of many nations. While the Norse were the first known humans to cross the Atlantic, it was the expedition of Christopher Columbus in 1492 that proved to be the most consequential. Columbus's expedition ushered in an age of exploration and colonization of the Americas by European powers, most notably Portugal, Spain, France, and the United Kingdom. From the 16th to 19th centuries, the Atlantic Ocean was the center of both an eponymou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
