Trigonoscuta rossi 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Arthropoda Insecta Coleoptera Curculionidae

Scientific Name: Trigonoscuta rossi Pierce, 1975
Common Name(s):
English Fort Ross Weevil

Assessment Information [top]

Red List Category & Criteria: Extinct ver 3.1
Year Published: 2014
Date Assessed: 2014-01-10
Assessor(s): Lyal, C.
Reviewer(s): Gerlach, J.
This species is known only from one very small area. It has not been located since 1975 and is assessed as Extinct. The cause of extinction is not known.
Previously published Red List assessments:

Geographic Range [top]

Range Description:

This species was known only from the area around Fort Ross, California.

Countries occurrence:
Regionally extinct:
United States (California)
Additional data:
Upper elevation limit (metres):10
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:No data are available on the population. It was last recorded in 1975.
Additional data:

Habitat and Ecology [top]

Habitat and Ecology:It was found in coastal sand dune habitats.
Continuing decline in area, extent and/or quality of habitat:No

Threats [top]

Major Threat(s): The species was known from only one small area but has not been recorded since 1975 and is suspected to be extinct. In the Fort Ross area, the sand dunes are likely to be degraded by rising sea levels.

Conservation Actions [top]

Conservation Actions: The only recorded site for the species is in the Fort Ross State Historic Park, but the species is assumed to be extinct.

Citation: Lyal, C. 2014. Trigonoscuta rossi. The IUCN Red List of Threatened Species 2014: e.T22147A21424454. . Downloaded on 26 May 2018.
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