Land snails of the Kimberley
Fifty snail species have been described on the Kimberley’s islands of Boongaree, Bigge and Augustus alone, and it’s likely there are more to be discovered in the region.
It’s this remarkable land snail diversity that has prompted this part of the Kimberley to be placed on the National Heritage List.
This small selection of Kimberley land snails show the ways in which some have spectacularly adapted to their local environment, providing sublime evidence of evolution in action.
Discover some of the Kimberley’s land snails:
Globorhagada wunandarra
This species, described in 2011, is endemic to Boongaree Island. It’s about 2cm in height, uniform almost chestnut brown and nearly globose in shape. The shell surface is covered with dense, very fine pustules.
Globorhagada prudhoensis
Having a uniform yellowish-brown shell, this is one of the larger species in the Kimberley, reaching perhaps up to 5cm in shell height.
Amplirhagada boongareensis
With 80 species in total, the genus Amplirhagada is the most diverse land snail genus in Australia. This species, endemic to Boongaree Island, is one of the largest, and arguably most beautiful, in this genus.
Kimberleymelon tealei
The shell of this species is similar to that of Globorhagada sp., but its vastly different reproductive anatomy reveals that both taxa are not closely related. Similar shell features may therefore represent convergent adaptation to a similar environment.
Amplirhagada katerana
Already discovered in 1981, this species is named after the island it calls home, Katers Island. Its shell may vary in colour somewhat, but is usually dominated by chocolatey brown tones.
Kimberleydiscus fasciatus
Another endemic to the Kimberley, this species is only distantly related to all others representing its own genus. It’s endemic to Bigge Island and its name refers to its distinctive disc-shaped and spirally striped shell.
