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Abstract <p>A comprehensive analysis of the mitochondrial genome sequence of <i>Morula spinosa</i> has been conducted to enhance the classification and systematics of the subfamily Ergalataxinae within the evolutionary framework of Muricidae. Its mitochondrial genome encompasses 16 102 base pairs and includes a total of 37&#xa0;genes. These genes consist of 13 protein-coding genes (PCGs), 22 transfer RNA (tRNA) genes, and 2 ribosomal RNA (rRNA) genes, which indicates a conspicuous AT bias. In this species, unlike certain species with isolated tRNA genes, <i>tRNA</i><sup><i>Ser1</i></sup> cannot form a typical secondary structure due to the absence of the DHU arm, while the remaining 21 tRNA molecules all maintain complete secondary structures. A comparative analysis with ancestral gastropods has revealed significant differences in three gene clusters, which comprise 15 tRNA genes and 8 PCGs. Inversions and transpositions are the primary types of rearrangements observed in the gene order of <i>M. spinosa</i>. The phylogenetic analysis robustly supports the monophyly of all six subfamilies within the family Muricidae. Furthermore, it positions <i>M. spinosa</i> in close association with <i>Tenguella</i> and <i>Drupella</i>, forming the Ergalataxinae subfamily branch. In summary, this study enriches the <i>Morula</i> mitochondrial dataset and enhances the refinement of systematic evolutionary relationships within the family Muricidae.</p>

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The Complete Mitochondrial Genome of Morula spinosa (Gastropoda: Neogastropoda), Gene Rearrangements, and Phylogenetic Relationships of Muricidae

  • 期刊论文

  • 发表日期：

    2025年6月1日

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  • Yanwen Ma,
  • Shengping Zhong,
  • Shan Huang,
  • Yingying Ye,
  • Man Zhang

摘要

Abstract

A comprehensive analysis of the mitochondrial genome sequence of Morula spinosa has been conducted to enhance the classification and systematics of the subfamily Ergalataxinae within the evolutionary framework of Muricidae. Its mitochondrial genome encompasses 16 102 base pairs and includes a total of 37 genes. These genes consist of 13 protein-coding genes (PCGs), 22 transfer RNA (tRNA) genes, and 2 ribosomal RNA (rRNA) genes, which indicates a conspicuous AT bias. In this species, unlike certain species with isolated tRNA genes, tRNASer1 cannot form a typical secondary structure due to the absence of the DHU arm, while the remaining 21 tRNA molecules all maintain complete secondary structures. A comparative analysis with ancestral gastropods has revealed significant differences in three gene clusters, which comprise 15 tRNA genes and 8 PCGs. Inversions and transpositions are the primary types of rearrangements observed in the gene order of M. spinosa. The phylogenetic analysis robustly supports the monophyly of all six subfamilies within the family Muricidae. Furthermore, it positions M. spinosa in close association with Tenguella and Drupella, forming the Ergalataxinae subfamily branch. In summary, this study enriches the Morula mitochondrial dataset and enhances the refinement of systematic evolutionary relationships within the family Muricidae.