Mitogenomic phylogeny of Muricidae (Gastropoda: Neogastropoda)

Abstract

Muricidae is one of the most species-rich and morphologically diverse families in Gastropoda, with a worldwide distribution. The classification of Muricidae has traditionally been based on shell and radular characteristics; however, the phylogenetic relationships within the family are debated due to morphological convergence and plasticity. In this study, to explore the phylogenetic relationships of Muricidae, we sequenced 11 muricid mitochondrial (mt) genomes and compared them with 13 previously reported complete muricid mt genomes. All muricid mt genomes shared the same gene arrangement and exhibited conserved genome size and nucleotide composition. Three-nucleotide deletions in atp8 and nad4, and three-nucleotide insertions in nad2 were detected in Rapaninae. Both maximum likelihood and Bayesian inference analyses supported the monophyly of each subfamily studied (Ocenebrinae, Muricinae, Rapaninae and Ergalataxinae).Ergalataxinae was recovered as the sister taxon of Rapaninae, refuting the traditional morphology-based placement of Ergalataxinae within Rapaninae. In Rapaninae, Indothais was confirmed to be monophyletic and determined to be a valid genus. Similarly, Drupina was determined to be an independent genus rather than a subgenus of Drupa. Purpura was recovered as a paraphyletic group, with Purpura panama being sister to Reishia + Rapana + Indothais and clustering with Purpura bufo.

Characterization of the complete mitochondrial genome of Desmaulus extinctorium (Littorinimorpha, Calyptraeoidea, Calyptraeidae) and molecular phylogeny of Littorinimorpha

“…The mitochondrial genome of D. extinctorium encompasses a total of 13 PCGs, comprising a cytochrome b ( Cytb ), two ATPases ( ATP6 and ATP8 ), three cytochrome oxidases ( COI–III ), and seven NADH dehydrogenases ( ND1–6 and ND4L ). This configuration aligns with the established structural pattern observed in the Muricidae family [ 64 ]. The collective length of these 13 PCGs amounts to 11,484 bp.…”

“…ND4L). This configuration aligns with the established structural pattern observed in the Muricidae family [64]. The collective length of these 13 PCGs amounts to 11,484 bp.…”

“…Similar to the prevailing pattern in many invertebrate species [ 64 , 65 ], the mitogenome of D . extinctorium harbors a total of 22 tRNA genes.…”

“…Similar to the prevailing pattern in many invertebrate species [64,65], the mitogenome of D. extinctorium harbors a total of 22 tRNA genes. Among these, fourteen are encoded by the heavy strand (H-), while the remaining ones are encoded by the light strand (L-).…”