China
China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and ...
Irrawaddy River
The Irrawaddy River ( Ayeyarwady River; , , from Indic ''revatī'', meaning "abounding in riches") is a river that flows from north to south through Myanmar (Burma). It is the country's largest river and most important commercial waterway. Origi ...
Lam River
Lam or LAM may refer to:
Organizations
* Laguna Art Museum, California, US
* Lam Eng Rubber, a Malaysian manufacturer
* Lam Research, American semiconductor equipment company
* LAM Mozambique Airlines, flag carrier airline of Mozambique
* Librar ...
drainage in central Vietnam. They are easily distinguished from other catfishes by their strongly depressed head and body and greatly enlarged paired fins that have been modified to form an adhesive apparatus. The flattened shape of these fish and the large pectoral and
pelvic fin
Pelvic fins or ventral fins are paired fins located on the ventral surface of fish. The paired pelvic fins are homologous to the hindlimbs of tetrapods.
Structure and function Structure
In actinopterygians, the pelvic fin consists of two en ...
s provide essential adhesion in the fast-flowing waters they live in.
Taxonomy
The taxonomy of this group is currently under discussion and changes seem inevitable as the group is suspected to be non-
monophyletic
In cladistics for a group of organisms, monophyly is the condition of being a clade—that is, a group of taxa composed only of a common ancestor (or more precisely an ancestral population) and all of its lineal descendants. Monophyletic gro ...
. Based on morphology, ''Oreoglanis'' has been divided into two species groups. According to the original description of these groups, the ''O. siamensis'' species group is distinguished by having an emarginate caudal fin, and a lower lip notched medially with an entire or weakly laciniate posterior margin, while the ''O. delacouri'' species group is distinguished by having a lunate caudal fin and a lower lip without a median notch with prominent extensions along the posterior margin. It has been suggested that only the marginal morphology of lower lip can be employed to recognize the two species groups.
Species
There are currently 24 recognized species in this genus:
* ''
Oreoglanis colurus
''Oreoglanis'' is a genus of fish in the family Sisoridae native to Asia. These fish live in fast-flowing streams in China, mainland Southeast Asia and the Indian subcontinent. They are mainly distributed in the Mekong, upper Salween and Irrawa ...
Oreoglanis delacouri
''Oreoglanis'' is a genus of fish in the family Sisoridae native to Asia. These fish live in fast-flowing streams in China, mainland Southeast Asia and the Indian subcontinent. They are mainly distributed in the Mekong, upper Salween and Irrawa ...
Oreoglanis frenata
''Oreoglanis'' is a genus of fish in the family (biology), family Sisoridae native to Asia. These fish live in rapids, fast-flowing streams in China, mainland Southeast Asia and the Indian subcontinent. They are mainly Range (biology), distribute ...
Oreoglanis jingdongensis
''Oreoglanis'' is a genus of fish in the family Sisoridae native to Asia. These fish live in fast-flowing streams in China, mainland Southeast Asia and the Indian subcontinent. They are mainly distributed in the Mekong, upper Salween and Irraw ...
Oreoglanis macronemus
''Oreoglanis macronemus'' is a species of sisorid catfish. It is known only from four preserved specimens collected from the Xiangkhoang Plateau, northern Laos, by an expedition led by Jean Théodore Delacour in the mid-1920s and misidentified as ...
Sinha
Sinha is a Sanskrit term which originates in the Indian subcontinent and is common in India, Sri Lanka, Bangladesh and Pakistan, covering South Asia. It comes from a Sanskrit word meaning " lion" or "brave person".
Usage
subcontinent
In Indi ...
Oreoglanis suraswadii
''Oreoglanis'' is a genus of fish in the family (biology), family Sisoridae native to Asia. These fish live in rapids, fast-flowing streams in China, mainland Southeast Asia and the Indian subcontinent. They are mainly Range (biology), distribute ...
Oreoglanis tenuicauda
''Oreoglanis'' is a genus of fish in the family Sisoridae native to Asia. These fish live in fast-flowing streams in China, mainland Southeast Asia and the Indian subcontinent. They are mainly distributed in the Mekong, upper Salween and Irraw ...