Monday, 6 August 2012

Two new species of freshwater Isopod Crustaceans from Lake Pedder in Tasmania.

In 1972 two small shallow lakes in southwest Tasmania, Lake Pedder and Lake Edgar, were inundated to create a reservoir to feed a hydroelectric power scheme, also called Lake Pedder, in the Serpentine River Valley. This was a source of great concern to biologists as the lakes were known to be host to a number of highly endemic species, some of which had never been formally described by scientists, including Isopod Crustaceans.

In a paper published in the journal Zootaxa on 1 August 2012, George Wilson of the Australian Museum in Sydney and Andrew Osborn and Nigel Forteath of the Queen Victoria Museum & Art Gallery in Launceston, Tasmania describe two new species of Isopod Crustaceans recovered by hand dredging Lake Pedder at the sites of the original Lake Pedder and the former Lake Edgar. Both species are placed within the previously described genus Colubotelson.

Map showing the locations where the new Crustaceans were found. Wilson et al. (2012).

The first new species is named as Colubotelson edgarensis; having been found within the extent of the former Lake Edgar, although it has subsequently been found among undescribed specimens collected from the original Lake Pedder in 1972. It was found at a depth of 9.2 m, the deepest point in the former Lake Edgar being 1.7 m, and the deepest point in the original Lake Pedder being slightly under 3 m. Colubotelson edgarensis is an (average length) 10 mm, Isopod Crustacean. It is brown-to-beige in colour, with cream patterning on its semi-translucent white head and a dark brown band between the eyes.

Colubotelson edgarensis, two male specimens, scale bars are 1.0 mm. Wilson et al. (2012).

The second species is named Colubotelson pedderensis, having been found within the extent of the original Lake Pedder, at a depth of 14.2 m. It is an (average length) 10 mm, brown Crustacean with irregular white bars.

Colubotelson pedderensistwo male specimens, scale bars are 5.0 mm. Wilson et al. (2012).

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  1. a creature similar to this one found only in shore lines of Aklan, Philippines. It grow upto about 5inches. its been a seasonal delicacy for centuries, taste really good buttery,sweet and salty taste that explodes in your mount best eaten with rice. It is a bottom dweller and only goes out after a storm. When water from mountains goes down to the sea, carrying sediments, these creatures go out for whatever reason mating or food, disturbed... i dont know. I dont know if there are studies for it yet. i don't even know the scientific name. Its only known by its local name "KAMANTAHA"

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