| Petruichthys | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Cypriniformes |
| Family: | Nemacheilidae |
| Genus: | Petruichthys Menon, 1987 |
| Type species | |
| Nemachilus brevis Boulenger, 1893 | |
Petruichthys is a genus of stone loaches native to eastern Asia. The genus is not universally accepted as valid and the two species placed there have been placed in other genera.
There are currently two recognized species in this genus, though one is not as yet assignable to this genus with complete certainty: [1]
Cypriniformes is an order of ray-finned fish, including the carps, minnows, loaches, and relatives. Cypriniformes is an Order within the Superorder Ostariophysi consisting of "Carp-like" Ostariophysins. This order contains 11-12 families, although some authorities have designated as many as 23, over 400 genera, and more than 4,250 species, with new species being described every few months or so, and new genera being recognized frequently. They are most diverse in southeastern Asia, and are entirely absent from Australia and South America. At 112 years old, the longest-lived cypriniform fish documented is the bigmouth buffalo.
Cobitidae, also known as the True loaches, is a family of Old World freshwater fish. They occur throughout Eurasia and in Morocco, and inhabit riverine ecosystems. Today, most "loaches" are placed in other families. The family includes about 260 described species. New species are being described regularly.
The hillstream loaches or river loaches are a family, the Balitoridae, of small fish from South, Southeast and East Asia. The family includes about 202 species. They are sometimes sold as "lizardfish" or "flossensaugers". Many of the species are popular for aquaria, species in the genus Sewellia are most commonly sold in the aquaria trade. They have a number of similarities with the Cobitidae, their sibling family of "loaches", such as multiple barbels around the mouth. They should not be confused with the loricariids, which look similar but are a family of catfish.
The clown loach, or tiger botia, is a tropical freshwater fish belonging to the botiid loach family. It is the sole member of the genus Chromobotia. It originates in inland waters in Indonesia on the islands of Sumatra and Borneo. In Sentarum, West Borneo that fish named: ulanguli. It is a popular fish in the freshwater aquarium trade and is sold worldwide.
Botia is a genus of freshwater fish in the loach family (Botiidae). It was a large genus with about 20 species. In 2004 Maurice Kottelat proposed in his paper to divide the genus into four related genera based on fish appearance and locality:
The spined loach is a common freshwater fish in Europe. It is sometimes known as spotted weather loach, not to be confused with the "typical" weather loaches of the genus Misgurnus. This is the type species of the spiny loach genus (Cobitis) and the true loach family (Cobitidae).
Yasuhikotakia is a genus of botiid loaches, many which are popular aquarium fish. It is named in honor of Japanese collector/researcher Dr. Yasuhiko Taki. This genus has been separated from the genus Botia in the paper by Maurice Kottelat in 2004.
Sundoreonectes is a genus consisting of two species of stone loaches from the southeast Asian island of Borneo.
Botiidae is a family of cypriniform ray-finned fishes from South, Southeast, and East Asia. Until recently they were placed in the true loach family Cobitidae, until Maurice Kottelat revised the loaches and re-elevated this taxon to family rank in 2012. The family includes about 56 species.
Epalzeorhynchos is a small ray-finned fish genus of the family Cyprinidae. Its members are – like some other cyprinids – known as "freshwater sharks" or simply "sharks". They are, however, freshwater members of the Osteichthyes lineage which is distinct from the Chondrichthyes lineage of sharks. The description of these animals as "shark" is most likely a reference to the shark-like shape of these popular cyprinids.
Yunnanilus cruciatus is a species of stone loach endemic to Vietnam. This species grows to a length of 3.4 centimetres (1.3 in) SL. It is sometimes placed in the putative monotypic genus Micronemacheilus but this genus is currently preoccupied by Micronemacheilus zispi, although this species is regarded by some authorities as a junior synonym of Traccatichthys taeniatus. Y. cruciatus occurs in the relatively still and shallow stretches of rivers where there is dense aquatic vegetation and the substrate is muddy and sandy. The species seems to be quite commonly found in the aquarium trade.
Triplophysa alticeps is a species of ray-finned fish in the genus Triplophysa. These stone loaches are occasionally placed in the genus Qinghaichthys by some authorities. It is endemic to Qinghaihu Lake in Qinghai Province, China.
Triplophysa rotundiventris is a species of ray-finned fish in the genus Qinghaichthys, although these stone loaches are placed in the genus Qinghaichthys by some authorities. It was described from a specimens taken in the Jiegu He, a tributary of upper Yangtze in the Yushu Tibetan Autonomous Prefecture, China.
Triplophysa zamegacephala is a species of ray-finned fish in the genus Triplophysaalthough these stone loaches are placed in the genus Qinghaichthys by some authorities. It occurs in the Gaize River in Xinjiang Autonomous Region, China.
Loaches are fish of the superfamily Cobitoidea. They are freshwater, benthic (bottom-dwelling) fish found in rivers and creeks throughout Eurasia and northern Africa. Loaches are among the most diverse groups of fish; the 1249 known species of Cobitoidea comprise about 107 genera divided among 9 families.
Paracobitis is a genus of Asian stone loaches.
Vaillantella, the long-fin loaches, is a small genus of loaches found in Southeast Asia. This genus is the only member of the family Vaillantellidae having been confirmed as such by M. Kottelat in his review of the loaches in 2012.
Lepidocephalus is a genus of loaches native to rivers in the Southeast Asian countries of Indonesia, Malaysia and Thailand and Manipur, north east India. Members of this genus are known as "spirit loaches". They resemble the related kuhli loaches and Lepidocephalichthys loaches, but are more robust and generally found deep in large rivers. With little or no light in their habitat, their eyes and pigmentation are reduced to various extent. One species, L. spectrum, completely lacks pigment and eyes, similar to cavefish. They are generally poorly known, but based on the relatively few scientific museum specimens they can reach up to 8 cm (3.1 in) in standard length.
The Nemacheilidae, or stone loaches, are a family of cypriniform fishes that inhabit stream environments, mostly in Eurasia, with one genus, Afronemacheilus found in Africa. The family includes about 790 species.
The Gastromyzontidae are a family of loaches native to China and Southeast Asia, where typically found in streams and rivers with a fast current. The family includes about 137 species in eighteen genera. This family was resurrected by M. Kottelat in his review and revision of the loaches in 2012. They are commonly called hillstream loaches.
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