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Kilátás az erkélyről 3.
Polypteriformes
Fish Guide
Polypteriformes
Bichirs
Nile Bichir
Scientific classification
Genera
Erpetoichthys
Polypterus
See text for species.
The bichirs are a family, Polypteridae , of
archaic-looking
ray-finned fishes , the sole family in the
order Polypteriformes . They have thick bonelike
scales and a series of dorsal finlets instead of a single
fin. The finlets are topped with sharp spines. Their jaw
structure more closely resembles that of the tetrapods than
that of the teleost fishes. Bichirs have a number of other
primitive characteristics, such as fleshy pectoral fins and
spiracles. All species occur in freshwater habitats in
Africa, mainly swampy, shallow floodplains and estuaries.
They have rudimentary lungs, which allow them to obtain oxygen from the air
when in poorly oxygenated waters.
[1] They are popular subjects of public and large
hobby
aquaria .
Species
There are eighteen extant species and subspecies in two
genera:[2]
Genus
Erpetoichthys
Reedfish, Erpetoichthys
calabaricus Smith, 1865 .
Genus
Polypterus
Guinean bichir, Polypterus ansorgii Boulenger,
1910.
Nile bichir, Polypterus bichir bichir Lacépčde,
1803.
Polypterus bichir katangae Poll, 1941.
Bichir, Polypterus bichir lapradei Steindachner,
1869.
Barred bichir, Polypterus delhezi Boulenger, 1899.
Polypterus endlicheri congicus Boulenger, 1898.
Saddled bichir, Polypterus endlicheri endlicheri
Heckel, 1847.
Polypterus mokelembembe Schliewen & Schafer,
2006.[3]
Ornate bichir, Polypterus ornatipinnis Boulenger,
1902.
Polypterus palmas buettikoferi Steindachner, 1891.
Shortfin bichir, Polypterus palmas palmas Ayres,
1850.
Polypterus palmas polli Gosse, 1988.
West African bichir, Polypterus retropinnis Vaillant,
1899.
Polypterus senegalus meridionalis Poll, 1941.
Gray bichir, Polypterus senegalus senegalus Cuvier,
1829.
Polypterus teugelsi Britz, 2004.
Mottled bichir, Polypterus weeksii Boulenger, 1898.
Extinct species include:
Polypterus faraou Otero et al., 2006 — late Miocene.[4]
in my opinion the fish looks very funny>
References
^
Berra, Tim M. (2001). Freshwater Fish Distribution. San
Diego: Academic Press.
ISBN 0120931567
^
"Polypteridae" .
FishBase. Ed. Ranier Froese and Daniel Pauly.
February 2006 version. N.p.: FishBase, 2006.
^
Schliewen & Schafer
(2006). "Polypterus
mokelembembe, a new species of bichir from the central
Congo River basin (Actinopterygii: Cladistia:
Polypteridae). ". Zootaxa 1129 : 23.
^
Otero, Likius, Vignaud
& Brunet (2006). "A new polypterid fish: Polypterus
faraou sp. nov. (Cladistia, Polypteridae) from the
Late Miocene, Toros-Menalla, Chad". Zoological
Journal of the Linnean Society 146 (2): 227.
DOI:10.1111/j.1096-3642.2006.00201.x .
External links
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