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Pseudoxiphophorus
''Pseudoxiphophorus'' is a genus of fish from the family Poeciliidae. The species in the genus were formerly considered to be in the genus ''Heterandria'' but workers found that most of the species were not closely related to the type species of that genus, '' Heterandria formosa'', and seven species were transferred to the genus ''Pseudoxiphophorus''. They are found in Central America. Species The following seven species are classified as belonging to the genus: *'' Pseudoxiphophorus anzuetoi'' (Rosen & Bailey 1979) *''Pseudoxiphophorus bimaculatus ''Pseudoxiphophorus'' is a genus of fish from the family Poeciliidae. The species in the genus were formerly considered to be in the genus ''Heterandria'' but workers found that most of the species were not closely related to the type species of ...'' (Heckel 1848)-(Twospot livebearer) *'' Pseudoxiphophorus cataractae'' (Rosen 1979) *'' Pseudoxiphophorus diremptus'' (Rosen 1979) *'' Pseudoxiphophorus jonesii'' ( Günther 1874) - ...
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Pseudoxiphophorus Obliquus
''Pseudoxiphophorus'' is a genus of fish from the family Poeciliidae. The species in the genus were formerly considered to be in the genus ''Heterandria'' but workers found that most of the species were not closely related to the type species of that genus, ''Heterandria formosa'', and seven species were transferred to the genus ''Pseudoxiphophorus''. They are found in Central America. Species The following seven species are classified as belonging to the genus: *'' Pseudoxiphophorus anzuetoi'' (Rosen & Bailey 1979) *''Pseudoxiphophorus bimaculatus ''Pseudoxiphophorus'' is a genus of fish from the family Poeciliidae. The species in the genus were formerly considered to be in the genus ''Heterandria'' but workers found that most of the species were not closely related to the type species of ...'' (Heckel 1848)-(Twospot livebearer) *'' Pseudoxiphophorus cataractae'' (Rosen 1979) *'' Pseudoxiphophorus diremptus'' (Rosen 1979) *'' Pseudoxiphophorus jonesii'' ( Günther 1874) - ( ...
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Pseudoxiphophorus Bimaculatus
''Pseudoxiphophorus'' is a genus of fish from the family Poeciliidae. The species in the genus were formerly considered to be in the genus ''Heterandria'' but workers found that most of the species were not closely related to the type species of that genus, '' Heterandria formosa'', and seven species were transferred to the genus ''Pseudoxiphophorus''. They are found in Central America. Species The following seven species are classified as belonging to the genus: *'' Pseudoxiphophorus anzuetoi'' (Rosen Rosen is a surname of Ashkenazi Jewish origin, the name deriving from the German word for roses. Notable people with this surname include: People A–H * Adam Rosen (born 1984), American-born British luger Olympian * Al Rosen (1924–2015), Amer ... & Bailey 1979) *'' Pseudoxiphophorus bimaculatus'' (Heckel 1848)-(Twospot livebearer) *'' Pseudoxiphophorus cataractae'' (Rosen 1979) *'' Pseudoxiphophorus diremptus'' (Rosen 1979) *'' Pseudoxiphophorus jonesii'' ( Günther 1874) - ...
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Pseudoxiphophorus Litoperas
''Pseudoxiphophorus'' is a genus of fish from the family Poeciliidae. The species in the genus were formerly considered to be in the genus ''Heterandria'' but workers found that most of the species were not closely related to the type species of that genus, ''Heterandria formosa'', and seven species were transferred to the genus ''Pseudoxiphophorus''. They are found in Central America. Species The following seven species are classified as belonging to the genus: *'' Pseudoxiphophorus anzuetoi'' (Rosen & Bailey 1979) *''Pseudoxiphophorus bimaculatus'' (Heckel 1848)-(Twospot livebearer) *'' Pseudoxiphophorus cataractae'' (Rosen 1979) *'' Pseudoxiphophorus diremptus'' (Rosen 1979) *'' Pseudoxiphophorus jonesii'' ( Günther 1874) - (Barred killifish) *'' Pseudoxiphophorus litoperas'' (Rosen & Bailey 1979) *''Pseudoxiphophorus obliquus ''Pseudoxiphophorus'' is a genus of fish from the family Poeciliidae. The species in the genus were formerly considered to be in the genus ''Hetera ...
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Pseudoxiphophorus Jonesii
''Pseudoxiphophorus'' is a genus of fish from the family Poeciliidae. The species in the genus were formerly considered to be in the genus ''Heterandria'' but workers found that most of the species were not closely related to the type species of that genus, ''Heterandria formosa'', and seven species were transferred to the genus ''Pseudoxiphophorus''. They are found in Central America. Species The following seven species are classified as belonging to the genus: *'' Pseudoxiphophorus anzuetoi'' (Rosen & Bailey 1979) *''Pseudoxiphophorus bimaculatus'' (Heckel 1848)-(Twospot livebearer) *'' Pseudoxiphophorus cataractae'' (Rosen 1979) *'' Pseudoxiphophorus diremptus'' (Rosen 1979) *'' Pseudoxiphophorus jonesii'' ( Günther 1874) - (Barred killifish) *''Pseudoxiphophorus litoperas'' (Rosen & Bailey 1979) *''Pseudoxiphophorus obliquus ''Pseudoxiphophorus'' is a genus of fish from the family Poeciliidae. The species in the genus were formerly considered to be in the genus ''Heteran ...
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Pseudoxiphophorus Diremptus
''Pseudoxiphophorus'' is a genus of fish from the family Poeciliidae. The species in the genus were formerly considered to be in the genus ''Heterandria'' but workers found that most of the species were not closely related to the type species of that genus, ''Heterandria formosa'', and seven species were transferred to the genus ''Pseudoxiphophorus''. They are found in Central America. Species The following seven species are classified as belonging to the genus: *'' Pseudoxiphophorus anzuetoi'' (Rosen & Bailey 1979) *''Pseudoxiphophorus bimaculatus'' (Heckel 1848)-(Twospot livebearer) *'' Pseudoxiphophorus cataractae'' (Rosen 1979) *'' Pseudoxiphophorus diremptus'' (Rosen 1979) *''Pseudoxiphophorus jonesii'' ( Günther 1874) - (Barred killifish) *''Pseudoxiphophorus litoperas'' (Rosen & Bailey 1979) *''Pseudoxiphophorus obliquus ''Pseudoxiphophorus'' is a genus of fish from the family Poeciliidae. The species in the genus were formerly considered to be in the genus ''Heterand ...
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Pseudoxiphophorus Cataractae
''Pseudoxiphophorus'' is a genus of fish from the family Poeciliidae. The species in the genus were formerly considered to be in the genus ''Heterandria'' but workers found that most of the species were not closely related to the type species of that genus, ''Heterandria formosa'', and seven species were transferred to the genus ''Pseudoxiphophorus''. They are found in Central America. Species The following seven species are classified as belonging to the genus: *'' Pseudoxiphophorus anzuetoi'' (Rosen & Bailey 1979) *''Pseudoxiphophorus bimaculatus'' (Heckel 1848)-(Twospot livebearer) *'' Pseudoxiphophorus cataractae'' (Rosen 1979) *''Pseudoxiphophorus diremptus'' (Rosen 1979) *''Pseudoxiphophorus jonesii'' ( Günther 1874) - (Barred killifish) *''Pseudoxiphophorus litoperas'' (Rosen & Bailey 1979) *''Pseudoxiphophorus obliquus ''Pseudoxiphophorus'' is a genus of fish from the family Poeciliidae. The species in the genus were formerly considered to be in the genus ''Heterandr ...
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Pseudoxiphophorus Anzuetoi
''Pseudoxiphophorus'' is a genus of fish from the family Poeciliidae. The species in the genus were formerly considered to be in the genus ''Heterandria'' but workers found that most of the species were not closely related to the type species of that genus, ''Heterandria formosa'', and seven species were transferred to the genus ''Pseudoxiphophorus''. They are found in Central America. Species The following seven species are classified as belonging to the genus: *'' Pseudoxiphophorus anzuetoi'' (Rosen & Bailey 1979) *''Pseudoxiphophorus bimaculatus'' (Heckel 1848)-(Twospot livebearer) *''Pseudoxiphophorus cataractae'' (Rosen 1979) *''Pseudoxiphophorus diremptus'' (Rosen 1979) *''Pseudoxiphophorus jonesii'' ( Günther 1874) - (Barred killifish) *''Pseudoxiphophorus litoperas'' (Rosen & Bailey 1979) *''Pseudoxiphophorus obliquus ''Pseudoxiphophorus'' is a genus of fish from the family Poeciliidae. The species in the genus were formerly considered to be in the genus ''Heterandri ...
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Heterandria
''Heterandria'' is a genus of livebearing fishes within the family Poeciliidae. Most species occur in Guatemala and its surroundings, particularly Mexico, but the midget livebearer ('' H. formosa'') comes from the southeastern United States. Though many Poecilidae are familiar aquarium fishes, e.g. guppies, mollies, platys and swordtails, species within ''Heterandria'' are not commonly kept as fish. Somewhat more frequently found in aquaria is ''H. formosa'', perhaps because it is one of the smallest known fish species in the world; its diminutive males are probably the smallest fish easy to keep as a pet. Species in this genus resemble egg-laying Cyprinodontoidei such as Fundulidae (topminnows) at first glance, and are thus sometimes called "killifish" though this is technically erroneous.FishBase (2009)''Heterandria'' species Retrieved April 8, 2009. Species FishBase currently recognize 3 species in this genus, but based on genetics, external characters, morphometrics a ...
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Type Species
In zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological type specimen(s). Article 67.1 A similar concept is used for suprageneric groups and called a type genus. In botanical nomenclature, these terms have no formal standing under the code of nomenclature, but are sometimes borrowed from zoological nomenclature. In botany, the type of a genus name is a specimen (or, rarely, an illustration) which is also the type of a species name. The species name that has that type can also be referred to as the type of the genus name. Names of genus and family ranks, the various subdivisions of those ranks, and some higher-rank names based on genus names, have such types.
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Heterandria Formosa
''Heterandria formosa'' (known as the least killifish, dwarf topminnow, mosqu or midget livebearer) is a species of livebearing fish within the family Poeciliidae. This is the same family that includes familiar aquarium fishes such as guppies and mollies. ''Heterandria formosa'' is not as commonly kept in aquaria as these species. Despite the common name "least killifish", it belongs to the family Poeciliidae and not to one of the killifish families. ''H. formosa'' is one of the smallest fish species; the 1991 ''Baensch Aquarium Atlas'' listed it as the 7th smallest fish in the world, and it remains the smallest fish species found in North America. Range and habitat ''Heterandria formosa'' is the only member of its genus found in the United States. Its geographical range spans the southeastern United States, from South Carolina south to Georgia and Florida, and westward across the Florida Gulf Coast to Louisiana. In recent years, this species has been collected in eas ...
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Johan Jakob Heckel
Johan * Johan (given name) * ''Johan'' (film), a 1921 Swedish film directed by Mauritz Stiller * Johan (band), a Dutch pop-group ** ''Johan'' (album), a 1996 album by the group * Johan Peninsula, Ellesmere Island, Nunavut, Canada * Jo-Han, a manufacturer of plastic scale model kits See also * John (name) John (; ') is a common male given name in the English language of Hebrew origin. The name is the English form of ''Iohannes'' and ''Ioannes'', which are the Latin forms of the Greek name Ioannis (Ιωάννης), originally borne by Hellenized J ...
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Donn Eric Rosen
Donn Eric Rosen (1929-1986) was a member of the staff of the American Museum of Natural History. He was a Distinguished Fellow of the American Society of Ichthyologists and Herpetologists. Family Born to immigrants Irwin Rosen (b. 1885) and Anita Gerber Rosen (b. 1906), Rosen has an older brother : Charles Welles. Both his parents were born in Russia. Irwin came to the United States in 1889 and had a career in architecture. Anita arrived in the United States prior to 1920. Works Rosen has written over twenty eight scientific papers. Rosen has described twenty three species. Selected publications *Rosen, Donn Eric, P. Humphry Greenwood 1970. Origin of the Weberian Apparatus and the Relationships of the Ostariophysan and Gonorynchiform Fishes, American Museum Novitates, American Museum of Natural History,New York, New York, USA, 2428 *Rosen, Donn Eric, Bailey, Reeve M. The Poeciliid Fishes (Cyprinodontiformes), Their Structure, Zoogeography, and Systematics. Bulletin of the A ...
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