Parancistrus

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Parancistrus
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Siluriformes
Family: Loricariidae
Subfamily: Hypostominae
Tribe: Ancistrini
Genus: Parancistrus
Bleeker, 1862
Type species
Hypostomus aurantiacus
Castelnau, 1855
Binomial name

Parancistrus aurantiacus
Castelnau, 1855
Parancistrus nudiventris
Rapp Py-Daniel and Zuanon, 2005
Synonyms

Acanthodemus Marschall, 1873

Parancistrus is a small genus of catfishes (order Siluriformes) of the family Loricariidae. It includes two species, P. aurantiacus and P. nudiventris.[1]

Contents

[edit] Taxonomy

The three species Hypostomus aurantiacus, H. nigricans, and H. vicinus were described by François Louis de la Porte, comte de Castelnau in 1855.[2] Parancistrus was described by Pieter Bleeker in 1862 and P. aurantiacus designated as type.[3] Later, P. nigricans and P. vicinus were deemed to be synonyms of P. aurantiacus, making P. aurantiacus the only species of Parancistrus until P. nudiventris was described in 2005.[2]

[edit] Distribution

P. aurantiacus is found in the Ucayali, Tocantins and Xingu Rivers.[4] P. nudiventris is found in the Xingu River in Brazil.[5]

[edit] Appearance and anatomy

Parancistrus is unique among loricariids due to the presence of fleshy folds on the naked area around the dorsal fin and at the pectoral fin points insertion in the breeding males.[2] Breeding males also have elongated odontodes on their bodies and pectoral fin spines.[2]

Parancistrus have stout bodies that are completely plated in adults. The dorsal fin membrane connects to the adipose fin spine. Their color is typically slate gray to black, occasionally with white streaks. They have large gill openings, which makes the genus different from all other loricariids except some Pogonopoma and Rhinelepis.[2]

P. aurantiacus reaches a length of about 19 centimetres (7.5 in) SL.[4]

[edit] References

  1. ^ Ferraris, Carl J., Jr. (2007). "Checklist of catfishes, recent and fossil (Osteichthyes: Siluriformes), and catalogue of siluriform primary types" (PDF). Zootaxa 1418: 1–628. 
  2. ^ a b c d e Armbruster, Jonathan W.. Parancistrus. Retrieved on 2007-06-01.
  3. ^ "Parancistrus". FishBase. Ed. Ranier Froese and Daniel Pauly. June 2007 version. N.p.: FishBase, 2007.
  4. ^ a b "Parancistrus aurantiacus". FishBase. Ed. Ranier Froese and Daniel Pauly. June 2007 version. N.p.: FishBase, 2007.
  5. ^ "Parancistrus nudiventris". FishBase. Ed. Ranier Froese and Daniel Pauly. June 2007 version. N.p.: FishBase, 2007.
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