Diplomystes chilensis

Taxonomy

Assessment Information

Geographic Range

Population

Habitat and Ecology

Threats

Conservation Actions

View Printer Friendly

Taxonomy [top]

Kingdom	Phylum	Class	Order	Family
ANIMALIA	CHORDATA	ACTINOPTERYGII	SILURIFORMES	DIPLOMYSTIDAE

Scientific Name:

Diplomystes chilensis

Species Authority:

(Molina, 1782)

Common Name/s:

English	–	Tollo, Tollo De Agua Dulce
Spanish	–	Bagre, Tollo, Tollo de agua dulce

Synonym/s:

Arius cacharioides Leybold, 1959

Arius micropterus Philippi, 1866

Arius papillosus Valenciennes, 1840

Arius squalus Philippi, 1866

Arius synodon Philippi, 1866

Arius villosus Philippi, 1866

Diplomystes papillosus (Valenciennes, 1840)

Silurus chilensis Molina, 1782

Assessment Information [top]

Red List Category & Criteria:

Data Deficient ver 3.1

Year Assessed:

2007

Assessor/s

Reis, R & Lima, F.

Evaluator/s:

Collen, B., Darwall, W., Ram, M. & Smith, K. (SRLI Freshwater Fish Evaluation Workshop)

Justification:
Assessed as Data Deficient due to the lack of information regarding its current status. As it has been considered extinct in the past, further research is required to determine whether this species persists, and if so, to ascertain its present range and continuing threats.

History:

1996	–	Endangered
1994	–	Endangered (IUCN)
1990	–	Endangered (IUCN 1990)
1988	–	Endangered
1986	–	Endangered (IUCN Conservation Monitoring Centre 1986)

Geographic Range [top]

Range Description:	This species is known from the Rapel River drainage basin between Chilean Regions V and VI.
Countries:	Native: Chile

Population [top]

Population:	Though this species has previously been regarded as extinct, two specimens attributed to this species were recently collected in the Rio Cachapoal, Rapel basin (Dyer 2000).
Population Trend:	Decreasing

Habitat and Ecology [top]

Habitat and Ecology:	D. chilensis is a demersal (living at or near the bottom of the water body) species.
Systems:	Freshwater

Threats [top]

Major Threat(s):	All diplomystids are considered to be potentially or actually threatened or endangered due to habitat deterioration and predation or competition by introduced trout, Oncorhynchus mykiss and Salmo trutta. Diplomystes chilensis may be extinct (Lundberg et al. 2004). This species is threatened by habitat degradation and contamination (Campos et al. 1998).

Major Threat(s):

All diplomystids are considered to be potentially or actually threatened or endangered due to habitat deterioration and predation or competition by introduced trout, Oncorhynchus mykiss and Salmo trutta. Diplomystes chilensis may be extinct (Lundberg et al. 2004).

This species is threatened by habitat degradation and contamination (Campos et al. 1998).

Conservation Actions [top]

Conservation Actions:	There are no conservation measures in place and research into the population trends and range of the species are required.

Conservation Actions:

There are no conservation measures in place and research into the population trends and range of the species are required.

Citation:	Reis, R & Lima, F. 2007. Diplomystes chilensis. In: IUCN 2009. IUCN Red List of Threatened Species. Version 2009.2. <www.iucnredlist.org>. Downloaded on 09 February 2010.
Disclaimer:	To make use of this information, please check the <Terms of Use>.
Feedback:	If you see any errors or have any questions or suggestions on what is shown on this page, please fill in the feedback form so that we can correct or extend the information provided