龟类细胞遗传学的研究Ⅱ.——平胸龟的核型和银染核仁组织者区及其系统发育的意义

本文采用骨髓细胞染色体标本制作法和快速银染法,研究了平胸龟的核型和银染核仁组织者区。分析结果表明了平胸龟和乌龟、黄喉水龟染色体演化上的同源性。它们之间可能存在着罗伯逊关系。平胸龟较乌龟、黄喉水龟可能更为原始些。     

Geographic variability in the genetic polymorphism of the Isopod,Venezillo evergladensis

Influence of host on hook morphology, soluble protein profile and two polymorphic loci of the marine tapeworms, Hepatoxylon trichiuri and H. megacephalum were studied. It was found that hook lengths of the two parasites differed significantly and that they varied with the host species. Unweighted pair-group analysis of soluble protein similarity indices separated H. trichiuri and H. megacephalum into three groups by fish host species. Allozyme analyses revealed that a polymorphic locus, glucose-6-phosphate dehydrogenase, of H. trichiuri showed significant variations in the allelic and phenotypic frequencies between populations of parasites from different host species, but a second polymorphic locus, esterase, did not show any host-related variation. Owing to the small sample size of H. megacephalum statistical analysis was not carried out for the allozyme study. However, allelic frequencies of the Est locus differed significantly between the two parasites. The possible influence of fish hosts on parasite morphology, protein biochemistry and population genetics was discussed.     

安徽岳西大别山区爬行动物新记录——平胸龟(Platysternon megacephalum)

平胸龟是一种特殊的淡水龟,在以往的报道中它只分布在长江以南地区.2012年6月在岳西县响肠乡发现不明野生龟类一个,根据其形态特征使用工具书进行检索后,判断该龟应为平胸龟,综合此前的文献记载确定其为大别山地区的新记录.