湖南省蛇类新纪录——龙胜小头蛇

2008年7月,在湖南省莽山自然保护区内(24°58′N,112°52′E,1000m)采集到蛇类标本1号,经鉴定,该蛇为龙胜小头蛇Oligodon lungshenensis,是湖南省蛇类新纪录。标本保存于西华师范大学生命科学学院标本室。标本为雄性成体,头体长390mm,尾长58mm。头较短小,与颈部区分不明显;背面棕褐色,有4条深色纵纹,中间2条较粗,各约占2枚背鳞,两边的2条较细,各约占半枚背鳞;从头至尾,有9条枣红色镶黑边的波状横纹,体背8条,尾背1条;每个横纹由4个波峰状斑相连而成;头部有3个黑色倒“V”字形纹,最后一个与颈背中间两条黑纵纹相连。腹面正中为一条桔红色纵纹,腹鳞和尾下鳞两侧或一侧有黑色正方块斑。吻鳞较大,显露于头部背面;前额鳞2枚,与鼻间鳞愈合;额鳞1枚呈六角形,长超过宽,长超过与其吻端的距离,稍短于顶鳞;顶鳞1枚,鼻鳞1枚,无颊鳞,眶前鳞1枚,眶后鳞2枚,眶上鳞1枚;前颞鳞2枚,后颞鳞2枚;上唇鳞6枚,2-2-2式,第一枚最小;下唇鳞7枚,前4枚切颔片,第4枚最大;前、后颔片各2枚。背鳞光滑无棱,通身15行;腹鳞167,肛鳞2枚,尾下鳞34对;尾端部最后一枚鳞片形成一个尖角。根据标本...

Exposure to chronic constant light impairs spatial memory and influences long-term depression in rats

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Co-occurrence of A1555G and G11778A in a Chinese family with high penetrance of Leber's hereditary optic neuropathy

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野生猕猴应激与抗应激的研究

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咖啡天牛的生存对策、 防治策略及其应用

通过分析咖啡旋皮天牛 Acalolepta cervinus (Hope)和咖啡灭字虎天牛 Xylotrechus quadripes Chevr.的生态对策、种间竞争策略,并结合有害生物综合管理(IPM)理论、咖啡林生态系统的特性、咖啡天牛的发生特点,提出了咖啡天牛的防治策略。

P16蛋白和生精细胞凋亡对热压和11酸睾酮诱导的恒河猴无精子症和少精子症中的作用

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The reproductive strategies of an endemic Tibetan fish, Gymnocypris selincuoensis

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