Stream catfish
Acrochordonichthys rugosus, drawing from the first description of Pieter Bleeker.
The river catfish ( Akysidae ) are a family of fish from the order of catfish -like ( Siluriformes ). They occur in fast flowing waters of Southeast Asia in Myanmar, Thailand and Malaysia as well as in Java, Sumatra and Borneo.
Features
River catfish are small fish of usually two to five, a maximum of about 15 centimeters in length. They are usually well camouflaged and live hidden. Head, body and fins are similar to the mountain catfishes ( Sisoridae ) of small nodules covered. Rows enlarged nodules extending along the body. The skin is regularly stripped and renewed. The head bears a pair of small eyes and four pairs of barbels. The dorsal fin has a short base and a well-developed hard radiation, and usually four or five soft rays. An adipose fin is usually present. The pectoral fins have a strong, mostly sawn hard radiation. The swim bladder is somewhat reduced.
System
The river catfish of the superfamily Sisoroidea be imputed, which is placed in the "Big Asica " group by molecular biological investigations.
Within the family, two subfamilies with a total of four or five genera and about 30 species are distinguished:
- Subfamily Akysinae: The enlarged skin nodules are in a row along the middle of the body and usually arranged in four rows and further contribute keratinized appendages. The dorsal fin usually has five soft rays. The adipose fin is medium in size and the hard ray of the pectoral fin has a notch on the front and is notched on the back. The gill opening is relatively narrow. The subfamily includes one or two genera; the Pseudobagarius species are placed by some authors in the genre Akysis: Akysis Akysis brachybarbatus
- Akysis Clavulus
- Akysis clinatus
- Akysis ephippifer
- Akysis fontaneus
- Akysis fuliginatus
- Akysis galeatus
- Akysis hendrick soni
- Akysis heterurus
- Akysis longifilis
- Akysis maculipinnis
- Akysis manipurensis
- Akysis microps
- Akysis pictus
- Akysis portellus
- Akysis prashadi
- Akysis pulvinatus
- Akysis recavus
- Akysis scorteus
- Akysis subtilis
- Akysis variegatus
- Akysis varius
- Akysis vespa
- Akysis vespertinus
- Pseudobagarius alfredi
- Pseudobagarius baramensis
- Pseudobagarius filifer
- Pseudobagarius fuscus
- Pseudobagarius hardmani
- Pseudobagarius inermis
- Pseudobagarius leucorhynchus
- Pseudobagarius macronemus
- Pseudobagarius meridionalis
- Pseudobagarius nitidus
- Pseudobagarius pseudobagarius
- Pseudobagarius similis
- Pseudobagarius sinensis
- Subfamily Parakysinae: The skin nodules are round and arranged in rows ( Acrochordonichthys and Breitensteinia ) or evenly distributed ( Parakysis ). The dorsal fin has four soft rays. The adipose fin is either long ( Parakysis ) or absent ( Acrochordonichthys and Breitensteinia ). The eyes are tiny. The barbels on the lower jaw often have a short secondary Bartel. The gills Reuse has no thorns. Lateral line pores absent. The subfamily was formerly partly managed as a separate family Parakysidae. Acrochordonichthys Acrochordonichthys chamaeleon
- Acrochordonichthys falcifer
- Acrochordonichthys guttatus
- Acrochordonichthys Gyrinus
- Acrochordonichthys ischnosoma
- Acrochordonichthys mahakamensis
- Acrochordonichthys pachyderma
- Acrochordonichthys rugosus
- Acrochordonichthys septentrionalis
- Acrochordonichthys strigosus
- Breitensteinia cessator
- Breitensteinia hypselurus
- Breitensteinia insignis
- Parakysis anomalopteryx
- Parakysis grandis
- Parakysis hystriculus
- Parakysis longirostris
- Parakysis notialis
- Parakysis verrucosus
Swell
- Joseph S. Nelson: Fishes of the world. 4 edition. John Wiley & Sons, Hoboken 2006, ISBN 978-0-471-25031-9, pp. 171-172.
- Tim M. Berra: Freshwater Fish Distribution. The University of Chicago Press, Chicago 2007, ISBN 9780226044422, pp. 207-208.