红嘴相思鸟的骨骼系统解剖  

Studies on Skeletal System of Leiothrix Lutea

作　　者：王夕龙[1] 袁施彬[1] 周材权[1] 齐赛飞[1] 

机构地区：[1]西华师范大学生命科学学院珍稀动植物研究所西南野生动植物资源保护教育部重点实验室,四川南充637009

出　　处：《西华师范大学学报（自然科学版）》2011年第1期55-62,共8页Journal of China West Normal University(Natural Sciences)

基　　金：西华师范大学博士科研启动项目(08B081)

摘　　要：采用常规方法对30只(9♂,21♀)红嘴相思鸟Leiothrix lutea骨骼进行详细的观察、描述和测量,为雀形目的进化与适应、系统发育和分类提供骨骼方面的资料.其特征是头骨薄而轻,颅腔较大;眶间距小,眼眶大;胸骨后侧缘具一对缺刻,龙骨突发达;尺骨外侧具6-7个突起;跗跖骨的第二跖骨滑车发达,滑车面宽,与第三趾骨滑车间距大;第一趾骨发达.胸骨的长度与深度之比(L/H)和宽度与深度之比(W/H)的平均值分别是2.25和1.25.对雌雄骨骼测量数据比较分析发现,除枕骨孔横径、枕骨孔纵径和耻骨长差异显著(P<0.05)外,其它骨骼参数差异不显著.这些骨骼特征与红嘴相思鸟快速而短暂地在灌木丛中穿梭,树枝间频繁的来回跳跃,在快速飞行时能迅捷且稳当地降落在树枝上的生态习性相适应.Leiothrix lutea is a kind of small singing bird of the order Passeriformes of the family Timaliidae.The skeletal system of Leiothrix lutea has been described and measured based on 30（9♂,21♀） specimens.It＇s characterized by the following： the skull is thin and light with a big cranial cavity;eye socket is large and interorbital distance is small.Two open notches are located symmetrically at lateral sides of caudal sternum which has well developed keel.The clavicle bears a lamellar interclavicle at the end.There are 6~7 protuberances outboard of the ulna.The trochleae of metatarsal Ⅱ is large and strong,and there is a crack between the trochle of metatarsal Ⅱ and tarsometatarsus.The phalange of hind toe is long and strong.The ratio of sternum＇s length and the depth（L/H） and width and the depth（W/H） are 2.25 and 1.25 respectively.Statistic analysis of the data show that there are significant differences in the transverse diameter and the vertical diameter of foramen magnum and the length of pubis between male and female.All these facts indicate that the skeleton structure of Leiothrix lutea conforms to their ecological habits.

关 键 词：红嘴相思鸟 骨骼 解剖 

分 类 号：Q954[生物学—动物学]