| Petruichthys | |
|---|---|
 | |
| Lake Inle loach ( Petruichthys brevis ) | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Cypriniformes |
| Family: | Nemacheilidae |
| Genus: | Petruichthys Menon, 1987 [1] |
| Type species | |
| Nemachilus brevis | |
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 recognised species in this genus: [2]
P. salmonides has been regarded as a species inquirenda [3] but Eschmeyer's Catalog of Fishes treats it as a valid recognised species within Petruichthys. [2]
Acropomatidae is a family of ray-finned fish in the order Acropomatiformes, commonly known as lanternbellies. Acropoma species are notable for having light-emitting organs along their undersides. They are found in all temperate and tropical oceans, usually at depths of several hundred meters. There are about 32 species in as many as 9 genera, although some authorities recognise fewer genera than Fishbase does.
Acanthocobitis is a genus of freshwater ray-finned fish of the stone loach family, Nemacheilidae. Recent work has suggested that the genus be split into two with the former subgenus Paracanthocobitis being raised to a full species, leaving just the type species, Acanthocobitis pavonacea, in the current genus.
Indoreonectes is a genus of stone loaches native to the Western Ghats in India.
Acanthocobitis pavonacea, also known as the spearfin loach, is a species of ray-finned fish belonging to the family Nemacheilidae, the stone loaches. This species is found in the Brahmaputra River ofAssam. This is one of two species in the genus Acanthocobitis, alongside the type species, A. longipinnis. A. longipennis was treated as synonym of this species but in 2021 Maurice Kottelat and Waikhom Vishwanath published a paper that argued that A. longipennis was a valid species and that it was one of two species ofloach in the genus Acanthocobitis, alongside A. pavonacea, with the other species being classified in the genus Paracanthocobitis. This species is the type species of the genus Acanthocobitis.
Annamia is a small genus of gastromyzontid loaches native to Southeast Asia. There are two species, though one of them is of doubtful validity and identity:
Glaniopsis is a small genus of loaches endemic to the island of Borneo.
Hypergastromyzon is a genus of ray-finned fish belonging to the family Gastromyzontidae, commonly called the hillstream loaches, although this also refers to the loaches in the family Balitoridae. The loaches in this genus are endemic to the island of Borneo in Southeast Asia.
Jinshaia is a genus of freshwater ray-finned fishes belonging to the family Balitoridae, the loaches in this family are commonly known as hillstream loaches although this name also refers to the loaches in the family Gastromyzontidae. These loaches are endemic to China.
Micronemacheilus is a genus of freshwater ray-finned fishes belonging to the family Nemacheilidae, the stone loaches. The loaches in this genus are found in eastern Asia.
Plesiomyzon is a monospecific genus of freshwater ray-finned fish belonging to the family Gastromyzontidae, a group which shares the common name hillstream loaches with the family Balitoridae. The only species in the genus is Plesiomyzon baotingensis, a loach that is endemic to the river systems of Hainan.
Protomyzon is a genus of ray-finned fish belonging to the family Gastromyzontidae, commonly called the hillstream loaches, although this also refers to the loaches in the family Balitoridae. The loaches in this genus are endemic to Borneo.
Pseudogastromyzon is a genus of ray-finned fish belonging to the family Gastromyzontidae, commonly called the hillstream loaches, although this also refers to the loaches in the family Balitoridae. The loaches in this genus are found in fast-flowing streams and rivers in China.
Serpenticobitis, popularly known as serpent loaches, is a small genus of loaches found in the Mekong River Basin in Southeast Asia. It is the only genus in the family Serpenticobitidae.
Bangana is a genus of fish in the family Cyprinidae, the carps and minnows. It is distributed across much of southern and eastern Asia. Species live mainly in the flowing waters of tropical and subtropical rivers.
Homalopteroides is a genus of freshwater ray-finned fishes belonging to the family Balitoridae, the loaches in this family are commonly known as hillstream loaches although this name also refers to the loaches in the family Gastromyzontidae. These loaches are found in Southeast Asia.
Petroschmidtia is a genus of marine ray-finned fishes belonging to the family Zoarcidae, the eelpouts. The species in this genus are placed in the genus Lycodes by FishBase but Catalog of Fishes recognises this as a valid genus.
Bashimyzon is a genus of freshwater ray-finned fishes belonging to the family Gastromyzontidae, a family which shares the common name hillstream loaches with the Balitoridae. These loaches are found in the Guangxi Province of China.
Labigastromyzon is a genus of ray-finned fish belonging to the family Gastromyzontidae, commonly called the hillstream loaches, although this also refers to the loaches in the family Balitoridae. The loaches in the genus are found in China.
Acanthocobitis longipinnis is a species of freshwater ray-finned fish belonging to the family Nemacheilidae, the stone loaches. This species is known from a single specimen, the holotype, which was collected from the Ganges. This species was first formally described in 1861 by the German naturalist and explorer Wilhelm Peters and Peters proposed the new genus Acanthocobitis. Later authors treated this species as a synonym of Cobitis pavonacea but in 2021 Maurice Kottelat and Waikhom Vishwanath published a paper that argued that A. longipennis was a valid species and that it was one of two species of loach in the genus Acanthocobitis, alongside A. pavonacea, with the other species being classified in the genus Paracanthocobitis. This species is the type species of the genus Acanthocobitis.
Petruichthys salmonides is a little known species of freshwater ray-finned fish belonging to the family Nemacheilidae, the stone loaches. It is known only from the holotype which was collected at "Mongpan" in southern Yunnan and described by B. L. Chaudhuri. It has been considered to be a synonym of Yunnanilus pleurotaenia but Yunnanilus fishes have restricted distributions that are disjunct from the given type locality of this species and Chaudhuri's original description does not match any Yunnanilus species. This species has been regarded as a species inquirenda but Eschmeyer's Catalog of Fishes treats it as a valid recognised species within Petruichthys.
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