Art market news: Columbian-born artist Oscar Murillo to be represented by the David Zwirner Gallery Murillo applies studio debris to his rough-hewn canvases in what can be classed as a performance. Last summer, the auction record for one of these canvases leapt from £20,000 to £254,000 amid gossip that he was to be represented by the White Cube gallery. Until then he had shown with numerous galleries, particularly the Carlos Ishikawa Gallery in London. The British ceramic artist and bestselling author Edmund de Waal is the latest to enter the orbit of the gargantuan Gagosian Gallery, which launches his first show in New York this week. Gagosian has a nose for celebrity and sales, and de Waal has become a household name in America since the publication of his book, Hare with the Amber Eyes. However, the artist will continue to be represented by the Alan Cristea Gallery in London where he has shown for years. A reduced, life-size version of Mark Wallinger's projected 154-foot White Horse is currently grazing in the grounds of the New Art Centre sculpture park in Wiltshire with a £275,000 price on its head. Wallinger won the Ebbsfleet Landmark commission to make the horse in 2008, but the recession and effect on private fundraising put the £15 million project on hold. Earlier this year, his dealer, Anthony Reynolds, sold three of the life-size versions, one to the British Council, which is displaying it on The Mall in London. Two more versions from the edition of five are available, one of which looks so much at home in Wiltshire, it would be hard to find a more appropriate setting. The Berlin based art dealer, Martin Klosterfelde, who frequently provided one of the most thought-provoking and entertaining stands at the Frieze Art Fair where he was on the advisory committee until he opted to show at the FIAC in Paris instead, has closed his gallery and taken up employment with Phillips auctioneers as a director and international contemporary art specialist. Klosterfelde worked with a number of radical artists including John Bock, Elmgreen and Dragset, and Rivane Neuenschwander. The closure of his gallery, which took the art world by surprise, will be a sad loss to the Berlin art scene but a boon to Phillips.