|Scientific Name:||Procambarus morrisi|
|Species Authority:||Hobbs & Franz, 1991|
|Red List Category & Criteria:||Critically Endangered B1ab(iii)+2ab(iii) ver 3.1|
|Assessor(s):||Crandall, K.A. & Cordeiro, J.|
|Reviewer(s):||Collen, B. & Richman, N.|
|Contributor(s):||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.|
Procambarus morrisi has been assessed as Critically Endangered B1ab(iii)+B2ab(iii). This species is known from a single cave and has an extent of occurrence of less than 100 km² and an area of occupancy of less than 10 km² (the diameter of the cave is 0.308 km²). It is experiencing a continual decline in quality of habitat from garbage dumping and recreational activities. Site area protection is urgently needed to prevent further degradation of suitable habitat.
|Previously published Red List assessments:||
|Range Description:||This species is found in Devil's Sink Cave in Putnam County, Florida (Hobbs and Franz 1991).|
Native:United States (Florida)
|Estimated area of occupancy (AOO) - km2:||0.308|
|Number of Locations:||1|
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||This species is known from 15 specimens, one collection of seven and a second of eight individuals (K. Crandall pers. comm. 2009).
|Current Population Trend:||Unknown|
|Habitat and Ecology:||This species is found in subterranean pools with large amounts of detritus (Hobbs and Franz 1991). The water depth varies between 31.7 m and 37.1 m with a water temperature of 22oC (K. Crandall pers. comm. 2009).|
|Major Threat(s):||This species is threatened by public access and recreational activities. The interior of the cave was described by Hobbs and Franz (1991) as being severely degraded by SCUBA divers on the eastern and southern sides. In the shaft area a Volkswagen car has been dumped (Hobbs and Franz 1991). In a recent dive by Tom Morris (1995), the silt cone from eroding sandstone around the pit to the sink, had grown to nearly cut off the entrance to the cave.|
This species has been given a NatureServe Global Heritage Status Rank of G1, and has been assigned an American Fisheries Society Status of 'endangered' based on its restricted range and ongoing habitat degradation (Taylor et al. 2007, NatureServe 2009). Site area protection is urgently needed with restricted access to the cave.
Hobbs, H.H.Jr and Franz, R. 1991. A New Troglobitic Crayfish Procambarus (Lonnbergius) morrisi, (Decapoda: Cambaridae) from Florida. Proceedings of the Biological Society of Washington 104(1): 55-63.
IUCN. 2010. IUCN Red List of Threatened Species (ver. 2010.3). Available at: http://www.iucnredlist.org. (Accessed: 2 September 2010).
NatureServe. 2009. NatureServe Explorer: An online encyclopedia of life [web application]. Version 7.1. Internet
Taylor, C.A., Schuster, G.A., Cooper, J.E., DiStefano, R.J., Eversole, A.G., Hobbs III, H.H., Robison, H.W., Skelton, C.W. and Thoma, R.F. 2007. A Reassessment of the Conservation Status of Crayfishes of the United States and Canada after 10+ Years of Increased Awareness. Fisheries, American Fisheries Society 32(8): 372-389.
|Citation:||Crandall, K.A. & Cordeiro, J. 2010. Procambarus morrisi. The IUCN Red List of Threatened Species 2010: e.T18205A7804935. http://dx.doi.org/10.2305/IUCN.UK.2010-3.RLTS.T18205A7804935.en . Downloaded on 07 October 2015.|
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