Ibero-mesornis

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Ibero-mesornis \Ibero-mesornis\ n.
     A sparrow-sized fossil bird of the Lower Cretaceous having a
     strutlike pectoral bone and vestigial tail; found in Spain;
     considered possibly the third most primitive of all birds.
     [WordNet 1.5]



From WordNet (r) 2.0 [wn]:

  Ibero-mesornis
       n : sparrow-sized fossil bird of the Cretaceous period having a
           vestigial tail; found in Spain; considered possibly the
           third most primitive of all birds