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. 2024 Jun 17;9(6):766-770.
doi: 10.1080/23802359.2024.2363346. eCollection 2024.

Complete mitochondrial genome of the giant triton snail Charonia tritonis (Tonnoidea: Charoniidae)

Shifeng Wang  1   2 , Chengbin He  1 , Jianlong Li  1 , Hongbin Lu  1 , Yongcan Zhou  1   2   3 , Xiang Zhang  1
Affiliations

Complete mitochondrial genome of the giant triton snail Charonia tritonis (Tonnoidea: Charoniidae)

Shifeng Wang et al. Mitochondrial DNA B Resour. .

Abstract

The giant triton snail, Charonia tritonis (Linnaeus, 1758), crucial for coral reef ecosystems as a primary predator of the crown-of-thorns sea star, is experiencing a significant decline due to overfishing for its ornamental shell, underscoring the urgent need for conservation and deeper understanding of its role within marine biodiversity. This study presents the first complete mitogenome sequence of C. tritonis. Spanning 15,346 bp, the C. tritonis mitogenome comprises 13 protein-coding genes (PCGs), 22 tRNA genes, and two rRNA genes. Phylogenetic analysis of 88 Littorinimorpha mitogenomes confirms C. tritonis and C. lampas are grouped together within the family Charoniidae as a sister group to the remaining Tonnoidea families. This research not only enhances the taxonomic classification and conservation efforts for marine gastropods but also serves as a vital reference for future evolutionary and genetic studies within the Caenogastropoda.

Keywords: Charonia tritonis; Tonnoidea; mitochondrial genome; phylogenetic analyses.

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Conflict of interest statement

No potential conflict of interest was reported by the author(s).

Figures

Figure 1.
Figure 1.
The specimen of Charonia tritonis (male). This photo was taken by Xiang Zhang.
Figure 2.
Figure 2.
Mitochondrial genome map of Charonia tritonis (GenBank accession number MT043269). In the inner circle, the shaded parts indicate the GC content. Represented with arrows, the transcription directions for the inner and outer genes are listed clockwise and anticlockwise, respectively.
Figure 3.
Figure 3.
A simplified maximum-likelihood (ML) tree was constructed based on the amino acid sequence alignment of 13 protein-coding genes (PCGs) from 12 mitogenomes of Tonnoidea. The two newly sequences of Charonia tritonis are highlighted by an asterisk and bold. The best-fitting model, mtMet + F + R10, selected based on the Bayesian information criterion, was implemented for the ML analysis. Ficoidea was used as outgroup. Branch support values were inferred using the ultrafast bootstrap method via the IQ-TREE web server. The NCBI GenBank accession numbers of all mitogenomes and their citations are shown in the figure and Table 1, respectively. The following mitogenomes were used: OR522697 (direct submission), MW376482 (direct submission), MT408027 (Zhong et al. 2020), MW316790–MW316792 (Sanders et al. 2021), KP716635 (Osca et al. 2015), EU827200 (Cunha et al. 2009), KU237290 (Choi and Hwang 2021), MG181942 (Cho et al. 2017), MT043269 (this study), OR251120.2 (this study), OR282483 (direct submission), and OR506572 (direct submission).
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