Rempel Emma M, Marcus Jeffrey M, Detwiler Jillian T
Department of Biological Sciences, University of Manitoba, Winnipeg, MB, Canada.
Mitochondrial DNA B Resour. 2021 Oct 11;6(11):3181-3183. doi: 10.1080/23802359.2021.1975508. eCollection 2021.
The file ramshorn snail Baker, 1926 (Gastropoda: Hygrophila: Planorbidae) is a widespread herbivorous North American freshwater snail found in diverse habitats, including standing and moving water bodies. Genome skimming by Illumina sequencing allowed the assembly of a complete nuclear rRNA repeat sequence and a complete circular mitogenome of 13,720 bp from consisting of 75.3% AT nucleotides, 22 tRNAs, 13 protein-coding genes, 2 rRNAs and a control region in the typical order found in panpulmonate snails. features a rare TTG start codon while and exhibit incomplete stop codons completed by the addition of 3' A residues to the mRNA. Phylogenetic reconstruction of mitochondrial protein-coding gene and rRNA sequences places as sister taxon to (Planorbidae) within family Planorbidae, which is consistent with previous phylogenetic hypotheses.
椎实螺属贝克种,1926年(腹足纲:基眼目:椎实螺科)是一种广泛分布的北美食草淡水螺,见于多种栖息地,包括静水和流动水体。通过Illumina测序进行基因组浅层测序,得以组装出一个完整的核rRNA重复序列以及一个来自椎实螺的13720 bp的完整环状线粒体基因组,该基因组由75.3%的AT核苷酸、22个tRNA、13个蛋白质编码基因、2个rRNA和一个控制区组成,其排列顺序为泛肺螺类蜗牛中的典型顺序。(某个基因)具有罕见的TTG起始密码子,而(另外两个基因)表现出不完全终止密码子,通过在mRNA上添加3' A残基而完成。线粒体蛋白质编码基因和rRNA序列的系统发育重建将(该物种)置于椎实螺科内(椎实螺属的某个种)的姐妹分类单元位置,这与先前的系统发育假说一致。