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Zewdi J. Tsegai Nicholas B. Stephens Graham M. Treece Matthew M. Skinner Tracy L. Kivell Andrew H. Gee 《Comptes Rendus Palevol》2017,16(5-6):690-701
Bone form reflects both the genetic profile and behavioural history of an individual. As cortical bone is able to remodel in response to mechanical stimuli, interspecific differences in cortical bone thickness may relate to loading during locomotion or manual behaviours during object manipulation. Here, we test the application of a novel method of cortical bone mapping to the third metacarpal (Mc3) and talus of Pan, Pongo, and Homo. This method of analysis allows measurement of cortical thickness throughout the bone, and as such is applicable to elements with complex morphology. In addition, it allows for registration of each specimen to a canonical surface, and identifies regions where cortical thickness differs significantly between groups. Cortical bone mapping has potential for application to palaeoanthropological studies; however, due to the complexity of correctly registering homologous regions across varied morphology, further methodological development would be advantageous. 相似文献
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本文以人们极少关注的两栖动物北部湾棱皮树蛙(Thelodermacorticale)为研究对象,采用瑞氏-姬姆萨混合染色法与血细胞计数法观察并统计了北部湾棱皮树蛙外周血细胞的形态特征和数量比例。结果显示,北部湾棱皮树蛙的外周血由红细胞、嗜中性粒细胞、嗜碱性粒细胞、嗜酸性粒细胞、淋巴细胞(包括大、小淋巴细胞)和单核细胞、血栓细胞7种细胞组成。其中,红细胞的数量最多,平均含量为2.43×105个/mm3,多呈椭圆形或卵圆形,少数呈泪滴形、梨形、逗号形、梭形,具椭圆或圆形核,核染色质密集,偶尔可观察到正在进行直接分裂或有丝分裂的红细胞。白细胞的数量比红细胞少,平均含量为1.74×104个/mm3,其中,小淋巴细胞占40.02%±1.77%、大淋巴细胞占10.83%±2.53%、单核细胞占23.17%±3.16%、嗜中性粒细胞占10.08%±4.62%、嗜碱性粒细胞占9.25%±2.69%、嗜酸性粒细胞占6.72%±1.50%。血栓细胞呈纺锤形和梭形,常单独存在,或者呈圆形和不规则圆形,数个集合在一起。 相似文献
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A new record of the rhacophorid frog, Theloderma licin is reported from Gunung Serambu, in the Bau region of western Sarawak, East Malaysia, which comprises the first published record of the species from the Sundaic island of Borneo. The species was previously known from the Malay Peninsula (southern Peninsular Thailand and Peninsular Malaysia). Species of Theloderma are widespread in mainland and insular Southeast Asia, their arboreal habits perhaps contributing to our perception of rarity. 相似文献
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