Spotted catfish

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Spotted catfish
Systematics
Order : Catfish (Siluriformes)
Subordination : Loricarioidei
Family : Armored and calloused catfish (Callichthyidae)
Subfamily : Armored catfish (Corydoradinae)
Genre : Corydoras
Type : Spotted catfish
Scientific name
Corydoras melanistius
Regan , 1912

The spot cory ( Corydoras melanistius ( Gr . "Melas" = dark, black + "Istion" = Sail)), also tailed catfish called, is one in the coastal rivers of the three Guiana beheimateter in northeastern South America freshwater fish .

features

Female spotted catfish reach a maximum size of 6 cm, males stay smaller. The spotted catfish has a typical Corydoras shape and a brownish pink, light brown or light gray basic color. The sides of the body are patterned with numerous, small, dark brown dots, which are arranged in 8 or 9 longitudinal rows. A broad, black line camouflages the eye and extends to the cheeks and the back of the head. A black spot lies on the front, lower part of the dorsal fin and on the adjacent back parts. The gill covers shine golden yellow. The fins are almost transparent. The dorsal, anal and caudal fins show some weak rows of dots. The iris is golden yellow. The dorsal fin of the males is slightly larger than that of the females. The upper row of bone plates on the sides of the body has 21 to 24 plates, the lower 19 to 21.

Way of life

Spotted armored catfish feed on worms, small crustaceans , insects, and vegetable matter. Spotted armored catfish females lay around 20 to 45 eggs (ø 1.7 to 1.8 mm) per clutch, which are laid individually and from which the young fish hatch after about 72 hours.

Systematics

The spotted catfish belongs to the group of short-snouted armored catfish , which in the future will probably be separated from Corydoras and assigned to a new genus. In the phylogeny of Alexandrou et al. (2011) the species is erroneously classified as long-snouted because the underlying DNA samples did not come from this species. Under the name Corydoras melanistius brevirostris a subspecies has been described that has fewer but larger spots on the sides of the body and a banded caudal fin. Today it is considered an independent species ( Corydoras brevirostris ).

literature

  • Hans-Jochim Franke: Handbook of Welskunde. Urania-Verlag, 1985.
  • Günther Sterba : The world's freshwater fish. 2nd Edition. Urania, Leipzig / Jena / Berlin 1990, ISBN 3-332-00109-4 .
  • Axel Zarske: Corydoras melanistius Regan, 1912. Black-banded catfish. In: Claus Schaefer, Torsten Schröer (Hrsg.): The large lexicon of aquaristics. Eugen Ulmer, Stuttgart 2004, ISBN 3-8001-7497-9 , p. 268 f.

Individual evidence

  1. ↑ Luiz Fernando Caserta Tencatt: Something wrong with my nose: The true identity of Corydoras melanistius Regan, 1912. Catfish Study Group Journal, Darwen, Lancashire, p. 4 - 5, 21 set. 2014.
  2. ↑ Markos A. Alexandrou, Claudio Oliveira, Marjorie Maillard, Rona AR McGill, Jason Newton, Simon Creer & Martin I. Taylor: Competition and phylogeny determine community structure in Müllerian co-mimics. Nature 469, 84–88 (January 2011), doi: 10.1038 / nature09660 Supplementary Information (5.9M) (PDF; 6.2 MB)
  3. ↑ Ingo Seidel: New knowledge about the relationships among armored catfish. in aquarium trade magazine No. 223 February / March 2012, Tetra-Verlag GmbH, ISSN  1437-4854
  4. ↑ Luiz Fernando Caserta Tencatt: Something wrong with my nose: The true identity of Corydoras melanistius Regan, 1912. in Catfish Study Group Journal, Volume 15, Issue 3, Sept. 2014

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