Mitchell's rainforest snail (''Thersites mitchellae'') is a

species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...

of large, air-breathing

land snail A land snail is any of the numerous species of snail that live on land, as opposed to the sea snails and freshwater snails. ''Land snail'' is the common name for terrestrial molluscs, terrestrial gastropod mollusks that have gastropod shell, shel ...

, a

terrestrial Terrestrial refers to things related to land or the planet Earth, as opposed to extraterrestrial. Terrestrial may also refer to: * Terrestrial animal, an animal that lives on land opposed to living in water, or sometimes an animal that lives on o ...

pulmonate Pulmonata or pulmonates is an informal group (previously an order, and before that, a subclass) of snails and slugs characterized by the ability to breathe air, by virtue of having a pallial lung instead of a gill, or gills. The group inclu ...

gastropod Gastropods (), commonly known as slugs and snails, belong to a large Taxonomy (biology), taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, freshwater, and fro ...

mollusc Mollusca is a phylum of protostome, protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant taxon, extant species of molluscs are recognized, making it the second-largest animal phylum ...

in the family

Camaenidae Camaenidae is a Family (biology), family of air-breathing land snails, terrestrial molluscs, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea, the typical snails and their allies. This is one of the most diverse families i ...

. This species is native to

Australia Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...

. It is an endangered species.

Description

The shell of this species measures up to 5.5 cm across and is reddish brown to black with two distinct yellow bands. The visible soft parts of the animal are black.

Ecology

While it prefers and enjoys palm and fig trees, the Mitchell's rainforest snail is usually traveling along the forest floor among fallen leaves or under the bark on many trees. This

nocturnal Nocturnality is a ethology, behavior in some non-human animals characterized by being active during the night and sleeping during the day. The common adjective is "nocturnal", versus diurnality, diurnal meaning the opposite. Nocturnal creatur ...

animal feeds upon leaf litter, fungi and lichen, making these substances its primary diet. Despite the fact the Mitchell's rainforest snail is nocturnal, it can be spotted year-round and has no specific season in which it may disappear or hibernate

Distribution and threats

The snail used to be commonly found in

rainforests Rainforests are forests characterized by a closed and continuous tree Canopy (biology), canopy, moisture-dependent vegetation, the presence of epiphytes and lianas and the absence of wildfire. Rainforests can be generally classified as tropi ...

and swampy parts of northern coastal lowlands and prefers palms and fig trees within rainforests. It also used to be found throughout coastal floodplain wetlands, coastal swamp forests, eastern riverine forests, littoral rainforests, northern warm temperate rainforests, and subtropical rainforests. Unfortunately, ''Thersites mitchellae'' is on the endangered species list due to numerous threats. These threats include, but are not limited to animals that have been introduced to the snail’s small habitat such as rats and birds. Other major threats consist of the use of herbicides and pesticides, fires, weed invasion, and is also largely tied to deforestation. This critically endangered snail is now largely restricted to a range of less than 5 km² of remnant lowland rainforest, scattered around the

Tweed Tweed is a rough, woollen fabric, of a soft, open, flexible texture, resembling cheviot or homespun, but more closely woven. It is usually woven with a plain weave, twill or herringbone structure. Colour effects in the yarn may be obtained ...

Byron George Gordon Byron, 6th Baron Byron (22 January 1788 – 19 April 1824) was an English poet. He is one of the major figures of the Romantic movement, and is regarded as being among the greatest poets of the United Kingdom. Among his best-kno ...

and Ballina Shires of northern New South Wales. A significant population can still be found on the Stotts Island Nature Reserve on the Tweed River. Scientists believe that less than 500 mature individuals remain in the wild.

References

Threatened Species Profile for Mitchell's Rainforest Snail

Rainforest Snail - Northern Rivers: Distribution and vegetation associations in the Northern Rivers

The IUNC Red List of Threatened Species - Thersites mitchellae

Thersites mitchellae — Mitchell's Rainforest Snail

Mitchell's Rainforest Snail - Priority actions

External links

{{Taxonbar, from=Q3075383 Camaenidae Gastropods described in 1864