* Spreadbetter sees opening losses for European bourses
* Crude futures dive after producers' supply talks break down
* Nikkei skids as investors assess Kumamoto quake impact
* Safe-haven yen rallies against dollar, euro
* Brazil's Rousseff loses crucial impeachment vote
By Lisa Twaronite
TOKYO, April 18 (Reuters) - Tumbling crude oil futures knocked Asian shares on Monday after producers' talks failed to agree on a plan to curb the global supply glut, while Tokyo stocks skidded as investors assessed the impact of a devastating earthquake in southwestern Japan.
The gloom was expected to spread to European bourses, with financial spreadbetter IG predicting Britain's FTSE 100 would open 0.9 percent lower and Germany's DAX was seen opening down 0.8 percent.
Some 18 oil exporting nations, including OPEC members, had gathered in Doha, the capital of Qatar, over the weekend in an attempt to agree to stabilise output at January levels until October 2016. The pact fell apart after Saudi Arabia demanded that Iran join in.
Brent crude futures tumbled about 4.2 percent to $41.31, while U.S. crude slid about 4.4 percent to $38.59.
MSCI's broadest index of Asia-Pacific shares outside Japan was 0.8 percent lower, pulling away from a five-month intraday high touched on Friday.
China's blue-chip CSI300 index was down 1.4 percent, while the Shanghai Composite Index lost 1.5 percent.
S&P 500 e-mini futures dropped 0.7 percent. Wall Street ended with modest losses on Friday but major indexes still posted weekly gains.
The Nikkei stock index ended down 3.4 percent, as investors and companies assessed the impact of devastating earthquakes in southwestern Japan's Kyushu island on manufacturers' supply chains.
A 7.3 magnitude tremor struck early on Saturday, following a smaller quake on Thursday, centred on the region's Kumamoto prefecture, an important manufacturing hub.
"We're seeing a perfect storm of the kind of negativity that feeds into people's fears and underscores the dangers lurking in a market where sentiment is very sensitive," said Stefan Worrall, director of Japan equity sales at Credit Suisse.
"It's unsurprising the yen's recent weakness has reversed given the sour macro sentiment arising from events like the natural disaster, the failure of the OPEC meeting to follow through on the encouraging promise it had shown, as well as smaller geopolitical risks like the impeachment going on in Brazil."
Brazilian President Dilma Rousseff lost a crucial impeachment vote in the lower house of Congress on Sunday and appeared almost certain to be forced from office. That could end 13 years of leftist Workers Party rule in Latin America's biggest economy.