The Fran?ois's langur(Trachypithecus francoisi)is a nationally protected animal in China.Individual identifi-cation of the Fran?ois's langurs is essential for monitoring,research,and conservation management.Mayanghe National Nature Reserve in Guizhou Province is the largest habitat for wild populations of the Fran?ois's langur.In this study,three groups of wild Fran?ois's langurs within the experimental area of Mayanghe Reserve were selected.The instanta-neous scan sampling method was used to observe the gibbon groups,and digital cameras were used to photograph the ventral groin patches of 16 adult and sub-adult females.By comparing the results,we found that there were individual differences in the patterns of ventral groin patches among Fran?ois's langurs,suggesting that these patterns can be used as a method for identifying individuals.This study provides newinsights and research methods for individual identifica-tion of Fran?ois's langurs and contributes to the fundamental data for studying their behaviorin the wild.Furthermore,it offers a scientific basis for the conservation and management of Fran?ois's langurs.

通过比较研究茶黑刺粉虱Aleurocanthus camelliae Kanmiya&Kasai和樟刺粉虱Aleurocanthus cinnamomi Takahashi形态特征,有助于更好地区分这两种刺粉虱种类.采集这两种粉虱标本,通过体视显微镜和扫描电镜对茶黑刺粉虱和樟刺粉虱不同龄期形态结构进行了系统观察和比较研究;同时将伪蛹制作玻片标本观察.茶黑刺粉虱和樟刺粉虱卵、1龄若虫和2龄若虫形态结构比较相似,但是伪蛹形态不同,刺的数量及分布有较大的区别.茶黑刺粉虱中央区隆起,尤其是管状孔区域更明显,位于一个凸起的瘤突上;亚缘区上有10～11对刺排列,樟刺粉虱亚缘区具有刺14对,其中头胸部5对,腹部9对.茶黑刺粉虱管状孔隆起,亚心形或近圆形,盖瓣心形,几乎充塞了整个管状孔区域;樟刺粉虱管状孔半圆形,盖瓣半圆形,充塞管状孔一半区域.两种刺粉虱成虫整体上比较相似,复眼、胸部和腹部及前翅基部为橙黄色;前后翅及身体上的白色粉状物都是由后足将腹部蜡盘分泌物覆盖上的,茶黑刺粉虱的粉状物比樟刺粉虱要多.前后翅上有不同形状的白色斑纹,左右翅斑相连,但是樟刺粉虱前翅后缘全白,而茶黑色粉虱前翅后缘仅有部分白斑.本研究结果有助于更好地区分樟刺粉虱和茶黑刺粉虱,为农林生产过程中准确鉴定和防治提供一定的参考资料.

目的 研究海南省口腔黏膜疾病发病规律,为临床预防及诊疗提供流行病学依据.方法 选取2011年10月至2020年5月中南大学湘雅医学院附属海口医院就诊的口腔黏膜疾病患者4 347例,收集临床资料,对患者发病情况、病种分布、性别、年龄及民族构成进行分析.结果 4 347例患者中男女比例接近1∶1,21～30岁年龄段口腔黏膜疾病最多发,疾病分类中占比前3位的分别为唇舌疾病(1 515例次,31.05％),溃疡类疾病(1 492例次,30.57％)和斑纹类疾病(1 282例次,26.27％).常见的口腔黏膜伴发类疾病为口腔黏膜下纤维性变伴发口腔白斑,伴发率51.6％.结论 海南地区唇炎发病率较高,黏膜下纤维性变高发于年轻男性,需进行针对性预防工作.