That was true until Kluge, believe in 91, reclassified them under Boa Dumerili. In other papers they are also classified under B. Dumerili, but Acrantophis Dumerili is/was the norm. The Madagscan ground and tree boas were also affected.

Acrantophis dumerili JAN 1860
Boa dumerili — BOULENGER 1893: 120
Acrantophis madagascariensis dumerili — STULL 1935: 405
Acrantophis dumerili — STIMSON 1969
Acrantophis dumerili — KLUGE 1991: 8
BOA DUMERILI - KLUGE 1991:48
Acrantophis dumerili — GLAW & VENCES 1994: 327
Boa dumerili — MCDIARMID, CAMPBELL & TOURÉ 1999: 185
Acrantophis dumerili — VENCES et al. 2001