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Fallicambarus hortoni

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA ARTHROPODA MALACOSTRACA DECAPODA CAMBARIDAE

Scientific Name: Fallicambarus hortoni
Species Authority: Hobbs & Fitzpatrick, 1970
Common Name(s):
English Hatchie Burrowing Crayfish

Assessment Information [top]

Red List Category & Criteria: Critically Endangered B1ab(iii) ver 3.1
Year Published: 2010
Date Assessed: 2010-06-01
Assessor(s): Crandall, K.A.
Reviewer(s): Collen, B. & Richman, N.
Contributor(s): Livingston, F., Livingston, F., Soulsby, A.-M., Batchelor, A., Dyer, E., Whitton, F., Milligan, H.T., Smith, J., Lutz, M.L., De Silva, R., McGuinness, S., Kasthala, G., Jopling, B., Sullivan, K. & Cryer, G.
Justification:

Fallicambarus hortoni has been assessed as Critically Endangered under criterion B1ab(iii). This species has an estimated extent of occurrence of 80 km2, and is known from a single tributary of the Hatchie River. Many of the tributaries of the Hatchie River system have undergone a decline in water quality as a result of sedimentation from channelization, agriculture, and deforestation. Monitoring of the population numbers of this species is required, along with characterization of site-specific threats to better define required conservation measures.

History:
1996 Endangered

Geographic Range [top]

Range Description: This species is known from 2 sites (Williams and Bivens 2001) on a tributary of Cypress Creek (in the Hatchie River drainage) in McNairy County, Tennessee (Hobbs and Fitzpatrick 1970). This species has an estimated extent of occurrence of 80 km2.
Countries:
Native:
United States (Tennessee)
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: The type colony of this species probably does not exceed 100 adults (Williams and Bivens 2001).
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: This is a burrowing species that was described from a roadside ditch, and is known to occur within a tributary of Cypress Creek (Hobbs and Fitzpatrick 1970). It is also known to burrow in sandy soil on herbaceous shrubland (NatureServe 2009).
Systems: Freshwater

Threats [top]

Major Threat(s): This species is known from a tributary of the Hatchie River system. The Hatchie has undergone a significant decline in water quality as a result of sedimentation, contaminants, and alteration to its hydrology. Most of these threats originate from previous channelisation of many tributaries (The Nature Conservancy 2009). Furthermore, sedimentation rates have been exacerbated by intensive cotton farming and deforestation in the surrounding catchment (US Fish and Wildlife Service 2009).

Conservation Actions [top]

Conservation Actions:

This species has been given a NatureServe Global Heritage Status Rank of G1, and was assigned an American Fisheries Society Status of 'endangered' based on its restricted range (Taylor et al. 2007, NatureServe 2009). Further research is required to determine the abundance of this species, and to what extent it is being impacted upon by threats within its range.




Citation: Crandall, K.A. 2010. Fallicambarus hortoni. The IUCN Red List of Threatened Species. Version 2014.2. <www.iucnredlist.org>. Downloaded on 27 August 2014.
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