Progress of the Ecnomiohyla valancifer program
at Universidad Nacional Autónoma de México


Ecnomiohyla valancifer

Common Name(s)

Rana-de Arbol De San Martin

Region where program is based


Country where program is based


The authority that recommended this species for an ex situ program

Has a genetic analysis been performed on wild populations to define the target taxon, i.e., verify that single, viable Evolutionarily Significant Units (ESU's) that are managed as separate populations, are not confounded by cryptic species or polymorphisms?

Name of the institution managing the ex situ population

Universidad Nacional Autónoma de México

Year the program started


Is at least some portion of the captive population maintained in range country?


Are sufficient resources available to manage the ex situ population?


Are adequate numbers of skilled staff available with the appropriate ex situ amphibian experience?


Is sufficient space available for the required population size?


Additional Support required

Water filtration equipment, lockdown improvements, material for decoration and field data collection for further releases.

Has a Taxon Management Coordinator for the ex situ population been appointed?


Taxon Management Coordinator

Víctor H. Jiménez-Arcos of Universidad Nacional Autónoma de México

Has a Taxon Management Group or Recovery Team been established?


Has a Taxon Management Plan, Recovery Plan or Species Action Statement been written?

In preparation

Web link to Taxon Management Plan

Have Husbandry Guidelines been written?

In preparation

Web link to Husbandry Management Guidelines

Have any knowledge gaps in the species biology or in their interaction with potential threats been identified that could benefit from research using the ex situ population?


List of knowledge gaps

Life history attributes, reproduction requirements, description of adult specimens and tadpoles.

Have founder needs been calculated using the AArk Amphibian Population Management Guidelines ?


Have sufficient potential founders been collected? ( AArk Amphibian Population Management Guidelines recommends a minimum of 20 pairs of found animals).


If sufficient founders have not been collected, is there an ongoing search for additional founders?


Is the ex situ population managed by nationals from the range country?


What tools are used to maximize retention of genetic diversity?


Has the population produced viable offspring?


Have the first generation captive-bred animals bred successfully?


Is the ex situ population housed in permanent isolation from other populations occurring outside its range?


Is work being supported to study and mitigate threats to the species in the wild, either by the institution or by a regional wildlife agency?


Have captive-bred or captive-reared animals been released into the wild?


If releases were undertaken, have disease screening protocols or veterinary health checks been conducted prior to releases to the wild?

Is follow-up work being carried out to monitor progress of the released animals?

Is the taxon again secure in the wild, even if it might still require some ongoing in situ management? i.e. has the need for a captive assurance population been obviated such that we can call this a successfully terminated captive rescue program?



The founders were donated from illegal trafficking in the vicinity of the type locality. A male and an adult female have been described; the formal description of the tadpole is lacking. The biology and ecology of the species is virtually unknown. It faces serious threats associated with habitat loss and fragmentation and potentially climate change as well as emerging diseases. We hope to implement a diagnostic program and monitor or on-site as soon as possible with the goal of being able to evaluate genetic diversity, environmental education in human communities and possible releases of specimens.
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