Mehedi Hasan ruthlessly exploited England's top-order deficiencies against spin to inspire Bangladesh to the most famous Test victory in their history.
The teenager made a mockery of his inexperience to run through England's fragile top order, taking five wickets as the tourists dramatically collapsed from 100 without loss to 139 for six after tea in an ultimately fruitless pursuit of 273.
Shakib Al Hasan took four wickets before Mehedi fittingly wrapped up proceedings as Bangladesh won by 108 runs inside three days in Dhaka for just their eighth Test success in 95 matches and first over England in 10 attempts.
A pulsating, see-saw series therefore finished all-square with one win apiece - and England will now move on to a five-Test series against India with serious question marks over their ability to play in subcontinent conditions.
Several of their batsmen have looked ill-at-ease against the turning ball, most notably Gary Ballance, who was out for his fourth consecutive single-figure score as England were all out for 164, losing all 10 wickets inside a session.
England's spinners were also considerably outperformed by their Bangladesh counterparts, and most notably Mehedi, who took 12 wickets in just his second Test with five-fors in both innings.
England captain Alastair Cook admitted after the match that his side had "a lot to work on" to improve in subcontinental conditions.
"Probably today we showed our inexperience in these conditions," Cook told Sky Sports 2.
"A lot of these guys have not played many Test matches and when that ball got rolling we found it very hard to stop.
"I was out there for a lot of it as well and I couldn't stop that ball.
"Credit to Bangladesh, they bowled well and caught well."
- Watch highlights on ITV4 at 6pm