'Globetrotting' New Worms Discovered on Great Barrier Reef and Swedish Coast
ScienceDaily (Mar. 8, 2010) — Between the grains of sand on the sea floor there is an unknown and unexplored world. Pierre De Wit at Gothenburg University knows this well, and has found new animal species on the Great Barrier Reef, in New Caledonia, and in the sea off the Gullmarsfjord in the Swedish county of Bohuslän.
The new species of Grania discovered off the Gullmarsfjord. (Credit: Pierre De Wit)
The layer of sand on ocean floor is home to a large part of the vast diversity of marine species. Species representing almost all classes of marine animals live here. The genus Grania, which belongs to the class of annelid worms Clitellata, is one of them.
Grania the globetrotter
Grania is a worm around two centimetres in length and mostly white, which is encountered in marine sand throughout the world, from the tidal zone to deep down in the ocean. The researcher Pierre De Wit, at the Department of Zoology of the University of Gothenburg, is analysing exactly how many species of Grania there are and how they are related to other organisms.
Four new species
De Wit has conducted studies at the Great Barrier Reef in Australia, where he and his colleagues have found four entirely new species of the Grania worm. One of them is the beautifully green-coloured Grania colorata. "These worms are usually colourless or white, and we have not been able to work out why this particular species is green," says De Wit.
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Read more here/Leia mais aqui: Science Daily
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De Wit's doctoral thesis Systematics of Grania (Clitellata: Enchytraeidae), an interstitial annelid taxon was publicly defended on 5 March 2010. Abstract/Resumo , Thesis/Tese [9.8 MB]
