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Abstract：
Parabreviscolexniepini is a recently described caryophyllidean monozoic tapeworm from schizothoracine fish on the Tibetan Plateau. In the present study, the complete mitochondrial genome of P.niepini is determined for the first time. The mitogenome is 15,034 bp in length with an A+T content of 59.6%, and consists of 12 protein-encoding genes, 22 tRNA genes, two rRNA genes, and two non-coding regions. The secondary structure of tRNAs exhibit the conventional cloverleaf structure, except for trnS1 (AGN) and trnR, which lack DHU arms. The anti-codon of trnS1 (AGN) in the mitogenome of P.niepini is TCT. The two major non-coding regions, 567 bp and 1428 bp in size, are located between trnL2 and cox2, trnG and cox3, respectively. The gene order of P.niepini shows a consistent pattern with other caryophyllideans. Phylogenetic analysis based on mitogenomic data indicates that P.niepini has a close evolutionary relationship with tapeworms Breviscolexorientalis and Atractolytocestushuronensis.
摘要：
Parabreviscolexniepini是最近描述的一种来自青藏高原裂刺鱼鱼的石竹单生tape虫。在本研究中,首次确定了尼皮尼完整的线粒体基因组。有丝分裂基因组长度为15,034bp，A+T含量为59.6%，由12个蛋白质编码基因组成，22个tRNA基因，两个rRNA基因,和两个非编码区。tRNA的二级结构表现出常规的苜蓿叶结构，除了trnS1(AGN)和trnR，缺乏DHU武器。尼皮尼有丝分裂基因组中trnS1(AGN)的反密码子为TCT。两个主要的非编码区，大小为567bp和1428bp，分别位于trnL2和cox2、trnG和cox3之间。Niepini的基因顺序与其他果石素一致。基于有丝分裂基因组学数据的系统发育分析表明，尼皮尼与liscoexorientalis和castushuronensis有密切的进化关系。
