Assertion: chorioallantoic placenta | /r/AtLocation | marsupial
Facets:
value: in mammals above marsupials
type: LOCATION
value: with long gestation periods
type: OTHER
Source sentences:
text: Chorioallantoic placentas (i.e., a large chorion fused with a large allantois) occur in certain lizards, in marsupials with long gestation periods, and in mammals above marsupials.