Trichomycterus alterus (Marini, Nichols & La Monte, 1933)
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 Family:  Trichomycteridae (Pencil or parasitic catfishes), subfamily: Trichomycterinae
 Max. size:  9.25 cm NG (male/unsexed)
 Environment:  benthopelagic
 Distribution:  South America: Humahuaca (Jujuy), Los Sauces River, Valle Guanchin (La Rioja) in Argentina.
 Diagnosis:  Dorsal soft rays (total): 10-13; Anal soft rays: 9-10
 Biology:  Collected from mountainous rivers and streams generally 0.5-4 m wide and 0.2-1 m deep, with clear waters running over sandy and rock-pebble substrates, at elevations of about 500-2,500 m. Stomach contents include dipteran larvae (Chironomidae and Ceratopogonidae), coleopterans (Elmidae), and ostracod crustaceans (Ref. 43677).
 IUCN Red List Status: Not Evaluated  (Ref. 96402)
 Threat to humans:  harmless
 Country info:   
 

 Entered by: Sa-a, Pascualita - 20.05.98
 Modified by: Capuli, Estelita Emily - 17.01.09

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