Cyprinodontiformes is an order of ray-finned fish, comprising mostly small, freshwater fish. Many popular aquarium fish, such as killifish and live-bearers, are included. They are closely related to the Atheriniformes and are occasionally included with them. A colloquial term for the order as a whole is toothcarps, though they are not actually close relatives of the true carps – the latter belong to the superorder Ostariophysi, while the toothcarps are Acanthopterygii.
The Ash Meadows killifish is a species of killifish from the subfamily Empetrichthyinae, part of the family Goodeidae, which was first documented by C. H. Gilbert in 1893 and historically occupied numerous springs near Ash Meadows, Nye County, Nevada, United States. This species was last seen in 1948 and is believed to have gone extinct in the early 1950s, likely as a result of habitat alteration and competition with and predation by introduced crayfish Procambarus clarkii, mosquitofish, black mollies, and bullfrogs.
The butterfly splitfin or butterfly goodeid is a bony fish from the monotypic genus Ameca of the splitfin family (Goodeidae). It was formerly found throughout the Ameca River drainage in Mexico; the type locality is Rio Teuchitlán in the vicinity of Teuchitlán, Jalisco. The species was only ever found in an area about 10 miles (15 km) in diameter.
The White River springfish is a species of fish in the family Goodeidae, the splitfins. It is a rare species of the Great Basin of western United States, where it is endemic to isolated warm springs in the White River drainage of eastern Nevada.
The Parras characodon is a species of goodeid fish once endemic to Coahuila, Mexico. Its natural habitats were destroyed between 1900 and 1953, and no records have been made in the last century; it is considered extinct, although the validity of this taxon and where the actual type locality is are subject to some doubt. The specific name honours the American herpetologist and ichthyologist Samuel Garman (1843–1927).
Allotoca is a genus of splitfins that are endemic to west-central and southwest Mexico, where restricted to the Lerna–Chapala–Grande de Santiago, Ameca and Balsas river basins, as well as various endorheic lake basins in Michoacán and Jalisco. All Allotoca species are seriously threatened.
The striped goodeid, bluetail goodeid or bluetail goodea is an endangered species of fish in the family Goodeidae. Its genus Ataeniobius is monotypic. It is endemic to the Río Verde and associated waters, including the Media Luna and Los Anteojitos lakes, in San Luis Potosí, Mexico. The specific name of this fish honours its discoverer, the America evolutionary biologist William Lawrence Tower (1872–1955) of the University of Chicago.
Goodea is a genus of splitfins that are endemic to Mexico. They are found in a wide range of habitats in several river basins that originate in the Central Plateau, such as Pánuco, Lerma–Chapala–Grande de Santiago and Balsas. Overall this genus is among the most widespread and successful splitfins, although they also have declined and the relatively restricted G. gracilis is considered vulnerable by the IUCN. This genus includes the largests splitfins, reaching a standard length of up to 20 cm (8 in). They are primarily herbivores, but also take small organisms like tiny crustaceans and snails. The is named in honour of the American ichthyologist George Brown Goode (1851-1896).
The Ameca River is a river of some 230 km (140 mi) in length in western Mexico. It originates in the Bosque de la Primavera in Jalisco, 23 km to the west of state capital Guadalajara; flows through the city of Ameca; and then forms the boundary between Jalisco and Nayarit on its way to the Pacific Ocean, where it drains into the Bahía de Banderas at Puerto Vallarta, Jalisco. Its main tributaries are the Ahuacatlán and Amatlán de Cañas.
Xenotoca is a genus of fish in the family Goodeidae from Mexico, where found in a wide range of habitats, from rivers and creeks to pools and lakes, in the Lerma–Grande de Santiago, Panuco, Cuitzeo and other basins of the Mesa Central. While no goodeid is a very common aquarium fish, the redtail splitfin, is one of the most common aquarium goodeids. Its relatively bright colors offset its reputation for being aggressive towards tankmates, occasionally even killing them. Similarly to that species, two species described in 2016 have males with red-orange tails, but this feature is not shared by the remaining members of the genus. The Xenotoca species are small, reaching up to 9 cm (4 in) in standard length.
The redtail splitfin or redtail goodeid is a species of goodeid fish from the family Goodeidae and subfamily Goodeinae. Like other members of Goodeinae, the redtail splitfin is native to Mexico and a livebearer. However, the goodeid mating system differs in several ways from the more common livebearing fish from the family Poeciliidae that includes guppies and swordtails. While no goodeid species is a very popular aquarium fish, the redtail splitfin is one of the most popular. Only the male has the red-orange tail for which it is named. Its specific name honours the collector of the type, Gustav Eisen (1847–1940) who was Curator of Marine Invertebrates at the California Academy of Sciences in San Francisco, California.
Goodeinae is a subfamily of splitfins from Mexico, part of the family Goodeidae. They are small fish which mostly live in fresh water, especially around Mesa Central, west of Mexico City. Members of the subfamily are also found in brackish water on both the east and west coasts. They typically have small ranges and many are seriously threatened. The subfamily takes its name from its type genus Goodea and so is ultimately named after the American ichthyologist George Brown Goode (1851-1896).
Zoogoneticus tequila, Tequila splitfin or simply Tequila fish, is a species of goodeid fish from Mexico. The specific epithet, tequila, derives from the Tequila Volcano, which looms near the type locality.
Aphanius danfordii, the Kızılırmak toothcarp or Sultan Sazlığı toothcarp, is a species of killifish belonging to the family Cyprinodontidae. It is endemic to the Kızılırmak River and the upper Seyhan River drainage systems and is now restricted to a few locations in the Sultan Sazlığı marshes. Though little data is available, the population of the fish seems to be declining. The International Union for Conservation of Nature has rated its conservation status as being "critically endangered" and fears it may become extinct in the wild if the drainage of the marshes continues.
Mucurilebias leitaoi is a species of rivulid killifish endemic to Brazil where it occurs, or formerly occurred, in the basin of the Mucuri River. This species can reach a length of 3 centimetres (1.2 in) TL. This species has not been seen since the original series of types was collected in 1988 and it may have become extinct due to the extensive habitat loss in the region. This species is the only known member of its genus, but it was formerly included in Leptolebias. The specific name of this fish honours the Brazilian ichthyologist and herpetologist Antenor Leitão de Carvalho (1910-1985).
Skiffia francesae, the golden skiffia or tiro dorado, is a species of splitfin endemic to the Rio Teuchitlán, a tributary of Río Ameca in western Mexico. It is extinct in the wild, but has been maintained in aquaria and the aquarium hobbyist trade.
Goodea atripinnis, the blackfin goodea, is a species of killifish from the family Goodeidae. This species was described by David Starr Jordan in 1880 with the type locality given as Leon, Guanajuato in Mexico. This species occurs as a native in nine Mexican federal states and has been introduced to Durango and to the Distrito Federal. It has the largest distribution range of any species within the family Goodeidae, its range extending from Hidalgo in the east to Nayarit in the west and from Michoacán in the south to Zacatecas in the north.
Goodea luitpoldii, the green goodea, is a species of killifish from the family Goodeidae which is endemic to the drainage basin of the Lerma River and the Grande de Santiago River in Mexico. This species was Species description described as Characodon luitpoldii by the Franz Steindachner in 1894 with the type locality given as Lake Pátzcuaro in Michoacán. The identity of the person honoured in its specific name is unknown but it is thought likely to be Luitpold, Prince Regent of Bavaria (1821-1912) whose daughter, Princess Therese of Bavaria (1850-1925) was an explorer and amateur naturalist and she collected the type.
Allotoca goslinei, commonly known as the banded allotoca or tiro rayado in Spanish, is a species of fish in the family Goodeidae. First described in 1987, it was once endemic only to the Ameca River basin in the Mexican state of Jalisco. It is now known to be extinct in the wild.
Xenotoca lyonsi, the Tamazula redtail splitfin, is a bony fish species in the goodeid family. Until 2016 it was considered to be a variant of the redtail goodeid, X. eiseni. A 2016 study by Omar Dominguez-Dominguez, et al. split the redtail goodeid into three separate species: X. eiseni, X. doadrioi and X. lyonsi.
