Species Information

Thaumatodon spirrhymatum

Species Authority

Solem, 1973

Species Status

Critically Endangered

Organism Type

Mollusc

Taxonomy

Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Order: Stylommatophora
Family: Endodontidae

Environment/System

terrestrial

Invasive Species Threat Summary

This Critically Endangered ground-dwelling detritivorous snail is endemic to tropical lowland moist forest on Cicia island in the Lau group of Fiji. About 10% of original forest remains on the island and is mostly confined to ravines (Google Earth, images December 2005). Loss and disturbance of moist-forest habitat is ongoing through processes such as shifting cultivation and harvesting of wood. Pacific rats (Rattus exulans) and black rats (Rattus rattus) are established on Cicia. These invasive mammals along with domestic fowl (Gallus gallus), pigs (Sus scrofa), cattle (Bos taurus), horses (Equus caballus) and goats (Capra hircus) are likely threats to this snail though disturbance of the microhabitat of the forest floor and/or predation. Other predatory invasive species of concern are ants (Solem 1990); bicoloured trailing ants (Monomorium floricola) are already established on Cicia (Ward and Wetterer 2006).

Invasive Species Management Summary

Surveys to determine the current distribution and population status of this snail are recommended. Continued biosecurity measures are critical to prevent the giant African snail (Achatina fulica), predatory rosy wolf snail (a href=http://www.issg.org/database/species/ecology.asp?si=92&fr=1&sts=&lang=EN>Euglandina rosea) and predatory flatworm (Platydemus manokwari) from establishing in Fiji. The giant African has the potential to displace indigenous land snails and has recently been shown to have predatory behaviour (Meyer et al. 2008). The predatory rosy wolf snail is used as a biological control against the giant African snail with resulting devastating consequences for indigenous land snail prey species (Cowie 2001, Barker and Efford 2004).

References

 Refresh   |         
CountryLocationTypeInvasive SpeciesCommon NameImpact Mechanism
FijiCiciaIslandRed JunglefowlHabitat alteration (potential)
FijiCiciaIslandBicolored Trailing AntOther-physical disturbance
FijiCiciaIslandPolynesian ratPredation (potential)
FijiCiciaIslandblack ratPredation (potential)
FijiCiciaIslandferal pigPredation (potential)
FijiCiciaIslandCattleGrazing/Herbivory/Browsing (potential)
FijiCiciaIslanddomestic goatGrazing/Herbivory/Browsing (potential)
FijiCiciaIslandHorseTrampling (potential)
FijiCiciaIslandred junglefowlHabitat alteration (potential)

PARTNERS
Implemented by
DONORS
An Initiative of the ACP Group, funded by the European Union under the 10th EDF