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Assessment Results




© 2016 David Wake (1 of 5 )

AmphibiaWeb species account




IUCN Red List assessment


Conservation Needs Assessment

Pseudoeurycea brunnata ,   Brown False Brook Salamander
Assessed for:  Mexico   on: 06 Sep 2018   by: Todd Pierson  
Assessment Status: Completed  
Order:   Caudata     Family:   Plethodontidae

IUCN Global Red List:   Critically Endangered (CR)   
IUCN National Red List:   (not assessed)   
Distribution:     Guatemala, Mexico  
Evolutionary Distinctiveness score:   11.20412439 
Recommended Conservation Actions:   Rescue  , In Situ Conservation  , In Situ Research  , Biobanking   
Additional Comments:   Completed by T.W. Pierson in September 2018. 

Question #Short NameQuestion TextResponseComments
1 Extinction risk Current IUCN Red List category. [Data obtained from the IUCN Red List.] Critically Endangered (CR)
2 Possibly extinct Is there a strong possibility that this species might be extinct in the wild? Yes / probably Rovito et al. (2009) report that this species "may be extinct". It was once abundant, but it has not been seen for many years, despite repeated surveys.
3 Phylogenetic significance The taxon’s Evolutionary Distinctiveness (ED) score, as generated by the ZSL EDGE program. (These data are not editable by Assessors). ED value < 20
4 Protected habitat Is a population of at least 50% of the individuals of the taxon included within a reliably protected area or areas? No / unlikely This species is protected under the "Special Protection" category of Mexican law, but it is not found in protected areas.
5 Habitat for reintroduction Does enough suitable habitat exist, either within or outside of currently protected areas that is suitable for potential reintroduction or translocation? Yes / probably Rovito et al. (2009) note that this the decline of this species does not seem to be tied to habitat loss, as it was once found even in disturbed areas, and some pristine habitat still remains. The latter evaluation seems to be made of Guatemala; I was unable to find information about the status of habitat in Mexico.
6 Previous reintroductions Have reintroduction or translocation attempts been made in the past for this species? No
7 Threat mitigation Are the threats facing the taxon, including any new and emerging threats not considered in the IUCN Red List, potentially reversible? Threats cannot / will not be reversed in time to prevent further decline / extinction This species is likely extinct. See Rovito et al. (2009) for a description of this enigmatic loss, coincident with frog declines in nearby regions.
8 Over-collection from the wild Is the taxon suffering from unsustainable collection within its natural range, either for food, for the pet trade or for any other reason, which threatens the species’ continued persistence in the wild? No / unlikely Acevedo et al. (2008) state that the decline of this species is "not a result of overcollection of specimens."
9 Population recovery Is the known population of this species in the wild large enough to recover naturally, without ex situ intervention if threats are mitigated? No / unlikely
10 Biological distinctiveness Does the taxon exhibit, for example, a distinctive reproductive mode, behaviour, aspect of morphology or physiology, within its Class (e.g. Amphibia, Reptilia etc.)? No aspect of biology known to be exceptional
11 Cultural/socio-economic importance Does the taxon have a special human cultural value (e.g. as a national or regional symbol, in a historic context, featuring in traditional stories) or economic value (e.g. food, traditional medicine, tourism) within its natural range or in a wider global context? No
12 Scientific importance Is the species vital to current or planned research other than species-specific ecology/biology/conservation? (e.g. human medicine, climate change, environmental pollutants and conservation science), within its Class (e.g. Amphibia, Reptilia etc.)? No research dependent on this species
13 Ex situ research Does conserving this species (or closely related species) in situ depend upon research that can be most easily carried out ex situ? Yes A better understanding of the susceptibility of this species to chytrid fungi (or, because it is likely extinct, closely related species) could likely be gained from experiments in the laboratory.
14 Husbandry analog Do the biological and ecological attributes of this species make it suitable for developing husbandry regimes for more threatened related species? i.e. could this species be used in captivity to help to develop husbandry and breeding protocols which could be used for a similar, but more endangered species at a later stage? No
15 Captive breeding Has this species been successfully maintained and bred in captivity? Not held in captivity to date I could find no record of this species in long-term captivity. One photo on AmphibiaWeb (0000 0000 0516 0530) depicts an animal apparently photographed in captivity in Chicago, Illinois. It is unclear how long this specimen was kept alive.
16 Educational potential Is the species especially diurnal/active/colourful and therefore suited to be an educational ambassador for conservation of this group of species? No
17 Mandate Is there an existing conservation mandate recommending the ex situ conservation of this taxon? Yes Yes--it is IUCN Critically Endangered.
18 Range State approval Would a proposed ex situ initiative for this species be supported (and approved) by the range State (either within the range State or out-of-country ex situ)?
19 Founder specimens Are sufficient animals of the taxon available or potentially available (from wild or captive sources) to initiate the specified ex situ program? No / unlikely
20 Taxonomic status Has a complete taxonomic analysis of the species in the wild been carried out, to fully understand the functional unit you wish to conserve (i.e. have species limits been determined)? Unknown This species was known from a series of disjunct populations in Mexico and Guatemala, and I am unaware of any assessment of variation within the species.

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