鼩鼱科内6个种的阴茎形态学(英文)  

Phallic morphology of six species of Soricid shrew

作　　者：涂飞云[1,2] 刘少英[2] 刘洋[2] 孙治宇[2] 朱天辉[1] 

机构地区：[1]四川农业大学,雅安625014 [2]四川省林业科学研究院,成都610066

出　　处：《兽类学报》2010年第3期278-282,共5页Acta Theriologica Sinica

基　　金：funded by the National Natural Science Foundation of China (30970330)

摘　　要：阴茎形态学特征是研究哺乳动物亲缘关系的有力工具,尤其是在近缘种之间。本试验选取鼩鼱科内的黑齿鼩鼱(Blarinella quadraticauda)、小纹背鼩鼱(Sorex bedfordiae)、大纹背鼩鼱(S.cylindricauda)、云南鼩鼱(S.excelsus)、四川短尾鼩(Anourosorex squamipes)和灰麝鼩(Crocidura attenuata)6个种共31号阴茎标本观察其阴茎形态学特征。研究结果表明:这6个种的阴茎均缺乏阴茎骨;在6个种的阴茎横切面上,尿道靠近阴茎腹侧面为阴茎海绵体包裹,没有单独的尿道海绵体存在,输精管由阴茎海绵体包裹,在阴茎末端形成两条输精管侧支;黑齿鼩鼱的阴茎具有独特的舌状结构,可作为鉴定黑齿鼩鼱的一个重要特征,鼩鼱属内的小纹背鼩鼱、大纹背鼩鼱和云南鼩鼱的阴茎头界限很难观察到,而黑齿鼩鼱、四川短尾鼩和灰麝鼩的阴茎头则具有明显的界限。The features of phallic morphology are powerful tools in understanding the phylogenetics of relationships in many mammalian species,especially sibling species.However,the traits of phallic morphology within the Soricidae remain poor-ly known.In this study,phallic morphological features from thirty-one penis specimens representing six species within the Soricidae were investigated and sketched.The results showed that the baculum of these penis specimens was absent as shown by examination of tissue sections.The urethra was dorsal to the corpus cavernosum which partially surrounds it,and no single corpus spongiosum urethra was present.The spermaducts were surrounded by the cavernous body of penis,and two branches of the spermaducts were conjoined in the distal part of the penes in these six species.A lingulate structure might be regarded as a unique feature within Blarinella quadraticauda,which was treated as a taxonomic criterion to identi-fy this species.Within Sorex（Sorex bedfordiae,S.cylindricauda,S.excelsus）,the boundary line of the glans penes was hardly observed.In contrast,the boundary line of glans penes was observed significantly within Blarinella（B.quadraticauda）,Anourosorex（Anourosorex squamipes） and Crocidura（Crocidura attenuata）.

关 键 词：阴茎 阴茎形态学 鼩鼱科 

分 类 号：Q954[生物学—动物学]