Mariosousa usumacintensis (Lundell) Seigler & Ebinger Mariosousa usumacintensis (Lundell) Seigler & Ebinger, Novon 16 (3): 419. 2006 sec. Seigler & Ebinger 2006≡Acacia usumacintensis Lundell, Contr. Univ. Michigan Herb. 4: 8, 1940 syn. sec. Seigler & Ebinger 2006