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Poeciliid
The Poeciliidae are a family of freshwater fishes of the order Cyprinodontiformes, the tooth-carps, and include well-known live-bearing aquarium fish, such as the guppy, molly, platy, and swordtail. The original distribution of the family was the Southeastern United States to north of Río de la Plata, Argentina, and Africa, including Madagascar. Due to release of aquarium specimens and the widespread use of species of the genera ''Poecilia'' and '' Gambusia'' for mosquito control, though, poeciliids can today be found in all tropical and subtropical areas of the world. In addition, ''Poecilia'' and ''Gambusia'' specimens have been identified in hot springs pools as far north as Banff, Alberta. Live-bearing Although the whole family Poeciliidae is known as "live bearers" (viviparous), some species are egg-scattering with external fertilization. All African species are egg-layers, and (with the exception of the members of the genus '' Tomeurus''), all American species are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Poeciliopsis Elongata
''Poeciliopsis'' is a genus of poeciliid fishes that primarily are native to Mexico and Central America. The only exceptions are ''P. turrubarensis'' where the range extends into Colombia, and ''P. occidentalis'' where the range extends into Arizona and New Mexico. Species There are currently 24 recognized species in this genus: * ''Poeciliopsis baenschi'' ( M. K. Meyer, Radda, Riehl & Feichtinger, 1986) (Golden livebearer) * ''Poeciliopsis balsas'' ( C. L. Hubbs, 1926) (Balsas livebearer) * ''Poeciliopsis catemaco'' ( R. R. Miller, 1975) (Catemaco livebearer) * '' Poeciliopsis elongata'' ( Günther, 1866) (Elongate toothcarp) * ''Poeciliopsis fasciata'' (Meek, 1904) (San Jeronimo livebearer) * ''Poeciliopsis gracilis'' ( Heckel, 1848) (Porthole livebearer) * ''Poeciliopsis hnilickai'' ( M. K. Meyer & Vogel, 1981) (Upper Grijalva livebearer) * ''Poeciliopsis infans'' ( Woolman, 1894) (Lerma livebearer) * ''Poeciliopsis latidens'' (Garman, 1895) (Lowland livebearer) * ''Poecili ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhexipanchax
''Rhexipanchax'' is a genus of poeciliid fishes native to tropical West Africa. Species There are currently four recognized species in this genus: * ''Rhexipanchax kabae'' ( Daget, 1962) * ''Rhexipanchax lamberti'' ( Daget, 1962) (Lambert's lampeye) * ''Rhexipanchax nimbaensis'' ( Daget, 1948) (Mt. Nimba lampeye) * ''Rhexipanchax schioetzi ''Rhexipanchax'' is a genus of poeciliid fishes native to tropical West Africa. Species There are currently four recognized species in this genus: * ''Rhexipanchax kabae'' ( Daget, 1962) * ''Rhexipanchax lamberti'' ( Daget, 1962) (Lambert's lam ...'' ( Scheel, 1968) (Schiötz' lampeye) References Poeciliidae * Freshwater fish genera Ray-finned fish genera {{Cyprinodontiformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Superfetation
Superfetation (also spelled superfoetation – see fetus) is the simultaneous occurrence of more than one stage of developing offspring in the same animal. In mammals, it manifests as the formation of an embryo from a different menstrual cycle while another embryo or fetus is already present in the uterus. When two separate instances of fertilisation occur during the same menstrual cycle, it is known as superfecundation. Humans While proposed cases of superfetation have been reported in humans, the existence of this phenomenon in humans has been deemed unlikely. Better explanations include differential growth between twins due to various reasons such as twin-to-twin transfusion syndrome. Artificially induced superfetation has been demonstrated, although only up to a short period after insemination. A 2008 French study found evidence to suggest that superfetation is a reality for humans, but that it is so rare that there have been fewer than 10 recorded cases in the world. In 2 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Poeciliopsis
''Poeciliopsis'' is a genus of poeciliid fishes that primarily are native to Mexico and Central America. The only exceptions are ''P. turrubarensis'' where the range extends into Colombia, and ''P. occidentalis'' where the range extends into Arizona and New Mexico. Species There are currently 24 recognized species in this genus: * '' Poeciliopsis baenschi'' ( M. K. Meyer, Radda, Riehl & Feichtinger, 1986) (Golden livebearer) * '' Poeciliopsis balsas'' ( C. L. Hubbs, 1926) (Balsas livebearer) * ''Poeciliopsis catemaco'' ( R. R. Miller, 1975) (Catemaco livebearer) * '' Poeciliopsis elongata'' ( Günther, 1866) (Elongate toothcarp) * ''Poeciliopsis fasciata'' (Meek, 1904) (San Jeronimo livebearer) * ''Poeciliopsis gracilis'' ( Heckel, 1848) (Porthole livebearer) * ''Poeciliopsis hnilickai'' ( M. K. Meyer & Vogel, 1981) (Upper Grijalva livebearer) * ''Poeciliopsis infans'' ( Woolman, 1894) (Lerma livebearer) * ''Poeciliopsis latidens'' (Garman, 1895) (Lowland livebearer) * ''Poeci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudopoecilia
''Pseudopoecilia'' is a genus of small poeciliid fishes native to rivers, streams, springs, ponds and pools in the Chocó-Tumbes region in southwestern Colombia, western Ecuador and northwestern Peru. Species There are currently three recognized species in this genus: * '' Pseudopoecilia austrocolumbiana'' Radda, 1987 * '' Pseudopoecilia festae'' ( Boulenger, 1898) * '' Pseudopoecilia fria'' ( C. H. Eigenmann & Henn Henn is a both a surname and an Estonian masculine given name. Notable people with the surname include: ;As a given name: * Henn-Ants Kurg (1898–1943), Estonian military colonel and diplomat * Henn Pärn (born 1941), Estonian politician * ..., 1914) References Poeciliidae Fish of South America Freshwater fish genera Taxa named by Charles Tate Regan Ray-finned fish genera {{Cyprinodontiformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fluviphylax
''Fluviphylax'' is a genus of tiny poeciliids native to the Amazon Basin, Orinoco Basin, and Oyapock Basin in South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere at the northern tip of the continent. It can also be described as the sout .... Species Five recognized species are placed in this genus: * '' Fluviphylax obscurus'' W. J. E. M. Costa, 1996 * '' Fluviphylax palikur'' W. J. E. M. Costa & Le Bail, 1999 * '' Fluviphylax pygmaeus'' ( G. S. Myers & J. de P. Carvalho, 1955) * '' Fluviphylax simplex'' W. J. E. M. Costa, 1996 * '' Fluviphylax zonatus'' W. J. E. M. Costa, 1996 References Poeciliidae Freshwater fish genera Fish of the Amazon basin Ray-finned fish genera Taxa named by Gilbert Percy Whitley {{Cyprinodontiformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tomeurus
''Tomeurus gracilis'' is a species of poeciliid fish native to South America, in Brazil, Surinam and Venezuela. This species grows to a length of TL. It is the only known member of its genus. This species is classified in the tribe Cnesterodontini in the 5th edition of Fishes of the World. but other workers place it in its own tribe, the Tomeurini. This is a sociable fish which lives in small schools consisting of several dozens of fishes. It is found in muddy creeks or along the sandy-muddy edges of shallow estuaries. It has been observed remaining still just below the surface but it prefers to hide beneath aquatic plants. Fertilisation is internal and, uniquely among the Poeciliinae Poeciliinae is a subfamily of killifish from the family Poeciliidae which contains species from the Americas which are collectively known as the livebearers because many, but not all, of the species within the subfamily are ovoviviparous. Chara ..., the females may then lay eggs placing them ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Poecilia
''Poecilia'' is a genus of fishes in the family Poeciliidae of the order Cyprinodontiformes. These livebearers are native to fresh, brackish and salt water in the Americas, and some species in the genus are euryhaline. A few have adapted to living in waters that contain high levels of toxic hydrogen sulfide ()Palacios, Arias-Rodriguez, Plath, Eifert, Lerp, Lamboj, Voelker, & Tobler (2013). The Rediscovery of a Long Described Species Reveals Additional Complexity in Speciation Patterns of Poeciliid Fishes in Sulfide Springs.' PLoS ONE 8(8): e71069. and a population of '' P. mexicana'' lives in caves (other populations of this species are surface-living). Some common and widespread species are often kept as aquarium fish, while other have very small ranges and are seriously threatened. All species in ''Poecilia'' are called mollies except for the Endler's livebearer (''P. wingei'') and the well-known guppy (''P. reticulata'') which have a distinctly different body shape from the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antilles
The Antilles (; gcf, label=Antillean Creole, Antiy; es, Antillas; french: Antilles; nl, Antillen; ht, Antiy; pap, Antias; Jamaican Patois: ''Antiliiz'') is an archipelago bordered by the Caribbean Sea to the south and west, the Gulf of Mexico to the northwest, and the Atlantic Ocean to the north and east. The Antillean islands are divided into two smaller groupings: the Greater Antilles and the Lesser Antilles. The Greater Antilles includes the larger islands of the Cayman Islands, Cuba, Hispaniola (subdivided into the nations of the Dominican Republic and Haiti), Jamaica, and Puerto Rico. The Lesser Antilles contains the northerly Leeward Islands and the southeasterly Windward Islands as well as the Leeward Antilles just north of Venezuela. The Lucayan Archipelago (consisting of The Bahamas and the Turks and Caicos Islands), though a part of the West Indies, is generally not included among the Antillean islands. Geographically, the Antillean islands are generally co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Family (biology)
Family ( la, familia, plural ') is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between order and genus. A family may be divided into subfamilies, which are intermediate ranks between the ranks of family and genus. The official family names are Latin in origin; however, popular names are often used: for example, walnut trees and hickory trees belong to the family Juglandaceae, but that family is commonly referred to as the "walnut family". What belongs to a family—or if a described family should be recognized at all—are proposed and determined by practicing taxonomists. There are no hard rules for describing or recognizing a family, but in plants, they can be characterized on the basis of both vegetative and reproductive features of plant species. Taxonomists often take different positions about descriptions, and there may be no broad consensus across the scientific community for some time. The publishing of new data and opin ... [...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] |
Poeciliopsis Prolifica
''Poeciliopsis prolifica'', or the blackstripe livebearer, is a species of small freshwater fish in the family Poeciliidae. It is endemic to Mexico. It is a viviparous species and the female can have several clutches of young developing internally at the same time, hence the specific name ''prolifica'', from the Latin ''proles'', "offspring" and ''ferax'', "rich, fruitful" in reference to the great number of young produced. Description ''Poeciliopsis prolifica'' is a small, slender silvery fish growing to a maximum length of about for males and for females. Adult males can be told from females by the presence of a gonopodium, an extended rod-shaped anal fin that acts as an intromittent organ to introduce sperm into the female during mating. Distribution and habitat The species is endemic to Mexico where it is only found on the eastern side of the Gulf of California, between the states of Sonora and Nayarit. It is a shallow-water, freshwater fish, tolerant of brackish water and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
