Chorioallantoic and yolk sac placentation in Thrichomys laurentinus (Echimyidae) and the evolution of hystricognath rodents - Oliveira, Moacir Franco de; Favaron, Phelipe Oliveira; Ambrósio, Carlos Eduardo; Miglino, Maria Angélica; Mess, Andrea Maria (Journal of Experimental Zoology - Part B: Molecular and Developmental Evolution, 2012)