3种鹭骨骼比较形态学研究

Comparative morphology study of the skeletons of three species of egrets

采集夜鹭、白鹭和池鹭3种成鸟制成骨骼标本,比较3属3种鹭骨骼形态结构。结果表明头部骨块愈合较好,腭罩不完整。腭骨成一对细的前后平伸的骨片,颌骨及左右颌骨在中部不合并,犁骨亦在中央开口分裂成索腭型。胸骨内面中线后部有大小不一的卵圆形凹穴,不同个体凹穴大小有差别,其原因可能与个体发育程度不同有关。

With the skeleton specimens made of fully grown Nycticorax nycicorax,Egretta garztta and Areeola bacchus,the morphological structures of these three species of egrets from three genera are studied and compared.The results show that the bones on the head heal up well,but palatal plates are incomplete.The jawbones are a pair of thin bone pieces extending flatly to the front and the rear;the maxilla and the left and right maxillas dont consolidate in the central section.The vomers in the middle split into desmognathism.Besides,the investigation shows that therere oval concave openings may attribute to the different development degrees of different individuals.