四种平胸鸟类蛋壳的微观结构比较及其意义  

Comparative Study on the Eggshell Microstructures of Four Extant Species of Ratite and Their Significance

作　　者：王烁[1] 张蜀康[2] 

机构地区：[1]天津师范大学生命科学学院,天津300387 [2]中国科学院古脊椎动物与古人类研究所

出　　处：《四川动物》2008年第4期493-496,共4页Sichuan Journal of Zoology

基　　金：天津师范大学科研专项(1CHS02B);天津师范大学校长基金资助

摘　　要：利用扫描电镜对现生非洲鸵鸟Struthio camelus、美洲鸵Rhea americana、鸸鹋Dromaius novaehollandiae和鹤鸵Casuarius casuarius蛋壳进行了对比。描述了4种蛋壳内外表面及径切面的形态特征和层次。结果显示鸸鹋与鹤鸵蛋壳外表面粗糙,具有明显的网状层;而非洲鸵和美洲鸵蛋壳更加近似。因而推测它们分别在形态发生和进化上存在某些联系,这与现代分子进化的研究结果一致。The microstructures of four extant species of ratite eggshells were compared among four species of ratites ： Stru- thio camelus, Rhea americana, Dromaius novaehollandiae and Casuarius casuarius through SEM. The features of inner and outer surface as well as the gradation of their cross-sections of these eggshells were also described. The results show that the outer surface that the eggshells of the Dromaius novaehollandiae and Casuarius casuarius eggshells are rough and their blocky crystal units are developed. On the other hand, Struthio camelus and Rhea americana are quite alike. Thus this suggests that the Dromaius novaehollandiae and Casuarius casuarius as well as the Struthio camelus and Rhea americana have some simi- larities in mophogenesis and evolution separately, which is consonant with the molecular evolution results.

关 键 词：蛋壳 超微结构 平胸类 

分 类 号：Q954[生物学—动物学]