Mitochondrial genome ofTesseropora rosea: molecular evidence for non-monophyly of the genusTetraclita

Abstract

The complete mitochondrial genome of Tesseropora rosea (Tetraclitidae) was presented. The genome is a circular molecule of 15,330 bp, which encodes 13 PCGs, two rRNA genes, and 22 tRNA genes. The length of all non-coding regions is 768 bp, with the longest one speculated as the control region (255 bp), which is located between 12S rRNA and trnK. Phylogenetic analysis based on mitochondrial PCGs shows that T. rosea is nested within the genus Tetraclita, more closely related to Tetraclita japonica than to Tetraclita rufotincta or Tetraclita serrata. Thus, the monophyly of the genus Tetraclita is not supported.

Complete mitochondrial genome of Tetraclita squamosa squamosa (Sessilia: Tetraclitidae) from China and phylogeny within Cirripedia

“…Song et al (2017) compared genome of four species from family Tetraclitidae, and found the mitochondrial gene order was highly conserved in the family. However, it has been reported that the genus Tetraclita does not constitute a monophyletic assemblage (Cai et al 2018); and Tetraclitidae is not monophyletic (Tsang et al 2015). Our result is consistent with these previous reports.…”

“…Result shows that T. squamosa squamosa is clustered with T. serrata into a branch (BP ¼ 100), and the two group with T. rosea and T. japonica, with T. rufotincta and T. divisa as the most distantly related species (Figure 1). In the tree, T. divisa as the most distantly related species within Tetraclitidae, which was consistent with the previous results (Song et al 2017;Cai et al 2018). Chelonbia testudinaria (Coronulidae) clusters with species from Tetraclitidae, which is consistent with Song et al (2017).…”

“…The length of coding sequences is 10,958 bp (72.13%), and it is shorter than Tesseropora rosea which was the lowest among the available mitochondrial genomes of Tetraclitidae in previous report (Cai et al. 2018 ). Both rRNAs are encoded on the light strand, as in the other crustacean and barnacle mitochondrial genomes.…”

“… 2017 ; Cai et al. 2018 ). Chelonbia testudinaria (Coronulidae) clusters with species from Tetraclitidae, which is consistent with Song et al.…”

The first mitochondrial genome ofMegabalanus tintinnabulum(Sessilia: Balanidae) from China: phylogeny within Cirripedia based on mitochondrial genes

“…In the phylogenetic tree, M. tintinnabulum clustered with M. ajax into a branch (BP ¼ 100), and they grouped with M. volcano with high support (BP ¼ 100). Amphibalanus amphitrite as the most distantly related species within Balanidae, which was consistent with the previous results (Song et al 2017;Cai et al 2018). Besides, Austrobalanidae is nested within Tetraclitidae, and two families (Balanidae and Archaeobalanidae) are revealed non-monophyletic.…”