Diplomystes
viedmensis MacDonagh, 1931 |
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| Image
contributors to this species: |
| Karl-Heinz Dau
(1 Stamp) |
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ScotCat Sources: |
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| Other
Sources: |
  
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| Relevant
Information: |
Dorsal spines (total):
2; Dorsal soft rays (total): 6 - 6; Anal spines: 4 - 5; Anal soft
rays: 8 - 11; Vertebrae: 41 - 43. Six species of Diplomystidae are
currently recognized (Arratia, 1987; Azpelicueta, 1994a-b). Berra
(2001) depicts the family distribution. Half of the species occur
west of the Andes in south central Chile. The trans-Andean species
are D. chilensis from rivers near Valparaíso and
Santiago, D. nahuelbutaensis from the Bío Bío
basin, and D. camposensis from the Valdivia region (Arratia,
1987). Three other species occur east of the Andes in southern Argentina.
Arratia (1987) erected the genus Olivaichthys for the Argentinian
specimens and Lundberg, et al (2004) follow Azpelicueta (1994a-b)
and most subsequent authors who treat Olivaichthys as a
synonym of Diplomystes. The cis-Andean species are D.
viedmensis from the Río Negro system, D. cuyanus
from the Río Colorado and the Desaguadero-Salado basin, and
D. mesembrinus known only from relatively few specimens from
Chubut and Senguerr rivers (Azpelicueta, 1994a-b). Diplomystes
viedmensis has been taken from rivers near sea level to about
1,900 m (Azpelicueta, 1994a). Diplomystids are generalized carnivores
that consume annelids, mollusks, and arthropods (Arratia, 1987;
Azpelicueta & Gosztonyi, 1998). Note:
Fishbase and the All Catfish Species Inventory go with Arratia
(1987) and name this species as Olivaichthys
viedmensis. |
| Common
Name: |
Otuno |
| Synonyms: |
Olivaichthys viedmensis |
| Family: |
Diplomystidaemblycipitidae |
| Distribution: |
South America:
Negro River and tributaries in Argentina. Type locality:
Río Negro, Argentina, frente a Viedma. |
| Size:
|
32.5cm.
(13ins) |
| Temp: |
20-24°C
(67-75°f.) |
| p.H. |
6.0 -7.0. |
| Reference: |
Lundberg, J.G.,
T.M. Berra and J.P. Friel 2004 First description of small
juveniles of the primitive catfish Diplomystes (Siluriformes: Diplomystidae).
Ichthyol. Explor. Freshwat. 15(1): 71-82.
Froese, R. and D. Pauly. Editors. 2009.FishBase.
World Wide Web electronic publication. www.fishbase.org, version
(09/2010). |
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Family: Diplomystidae
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Diplomystes
viedmensis
Stamp
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