Abstract

Osedaxrubiplumus(Annelida, Siboglinidae)uses heterotrophic bacteria to feed onvertebrate carcasses and is currently found in the Pacific, Antarctic and Indian Ocean.Here, we report its nearly complete mitochondrial genomes assembled for 2 individuals, one from the East Pacific and the other from the Southwest Indian Ocean. Recoveredmitogenomes were 15591 and 15972 bp in length, with both consisting of 37 typical metazoan mitochondrial genes. All genes were transcribed from the same strand, and arranged in the same order as the other siboglinids, revealing conserved gene arrangement withinSiboglinidae. Phylogeneticanalysis of 13 protein coding genes confirms the placement of Osedaxsister to the Vestimentifera+Sclerolinum clade.

摘要

Osedaxrubiplumus（Annelida，Siboglinidae）利用异养细菌饲养无脊椎动物的尸体，目前在太平洋，南极和印度洋发现，这里报道了其近乎完整的线粒体基因组，由2个个体组装而成，一个来自东太平洋，另一个来自西南印度洋。恢复的有丝分裂基因组长度为15591和15972 bp，均由37个典型的后生线粒体基因组成。所有基因均从同一条链转录而成，并以与其他血吸虫相同的顺序排列，从而揭示了西伯科的保守基因排列。13种蛋白质编码基因的系统进化分析证实，Osedax姐妹位于Vestimentifera + Sclerolinum进化枝中。