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We report the complete mitochondrial genome (mitogenome) of the giant ramshorn snailMarisa cornuarietis, a biocontrol agent of freshwater weeds and snail vectors of schistosomes. The mitogenome is 15,923 bp in length, encoding 13 protein-coding genes, 22 transfer RNAs and 2 ribosomal RNAs. The mitogenome is A+T biased (70.0%), with 28.9% A, 41.1% T, 16.7% G, and 13.3% C. A comparison withPomacea canaliculata, the other member in the same family (Ampullariidae) with a sequenced mitogenome, shows that the two species have an identical gene order, but their intergenic regions vary substantially in sequence length. The mitogenome data can be used to understand the population genetics ofM. cornuarietis, and resolve the phylogenetic relationship of various genera in Ampullariidae. [ABSTRACT FROM PUBLISHER]

Despite the importance of many species of Faviidae as structural-forming corals, only five species in three genera had a sequenced mitochondrial genome. We report the sixth complete mitochondrial genome in this family from the brain coral Platygyra carnosus, which is 16,463 bp in length and AT rich (67.0%). It has the typical coral mitochondrial gene arrangement, consisting of 13 protein-coding genes, 2 ribosomal RNA (rRNA) genes and 2 transfer RNA (tRNA) genes (tRNA-Met and tRNA-Trp). The ND5 gene is interrupted by a large group I intron which contains 10 protein-coding genes and 12S rRNA. Compared with related species from the same family, the three non-coding regions that are longer than 200 bp are less conserved in sequences than the coding regions, indicating potential markers for population genetic studies. [ABSTRACT FROM AUTHOR]