MOSCOW, April 4 (Reuters) - The Russian rouble

weakened slightly against the U.S. dollar on Thursday.

By 0715 GMT, the rouble was 0.17% down at

92.47 to the dollar after trading in a range of 92.288 to

92.480.

Against the euro, the rouble weakened by

0.32% to 100.16 and dropped 0.11% to 12.74 against the yuan

.

Brent crude oil, a global benchmark for Russia's

main export, was flat at $89.31 a barrel.

Russian stock indexes fell. The dollar-denominated RTS index

was down 0.13% at 1,155.84. The rouble-based MOEX

Russian index lost 0.09% to 3,392.70.

($1 = 92.4650 roubles)

(Reporting by Reuters

Editing by David Goodman

)