RESUMEN
Apple snails of the genus Pomacea Perry, 1810 (Mollusca: Caenogastropoda: Ampullariidae) are native to the Neotropics and exhibit high species diversity, holding cultural and ecological significance as an important protein source in Peru. However, most genetic studies in Pomacea have focused mostly on invasive species, especially in Southeast Asia, where they are considered important pests. In this study, we assembled and annotated the mitochondrial genomes of two Pomacea species native to the Peruvian Amazon: Pomacea reevei Ampuero & Ramírez, 2023 and Pomacea aulanieri (Deville & Hupé, 1850). The mitogenomes of P. reevei and P. aulanieri comprise 15,660 and 16,096 bp, respectively, and contain the typical 37 genes of the animal mitochondria with a large control region of 292 bp in P. reevei and 524 bp in P. aulanieri-which fall within the range of what is currently known in Pomacea. Comparisons with previously published mitogenomes in Pomacea revealed differences in the overlapping of adjacent genes, the size of certain protein-coding genes (PCGs) and the secondary structure of some tRNAs that are consistent with the phylogenetic relationships between these species. These findings provide valuable insights into the systematics and genomics of the genus Pomacea.
Asunto(s)
Genoma Mitocondrial , Animales , Perú , Filogenia , Genoma Mitocondrial/genética , Caracoles/genética , Mitocondrias/genéticaRESUMEN
Resumen Los Pleurobranchida son babosas marinas que agrupan alrededor de 100 especies distribuidas en los mares a nivel mundial, pero con una mayor diversidad en ambientes costeros tropicales y templados. En el Pacífico Oriental se han reportado 2 familias, 4 géneros y más de 10 especies de Pleurobranchida. La especie Berthellina ilisima Marcus & Marcus 1967 común en la Provincia del Pacifico Oriental Tropical se registra formalmente en aguas costeras de Tumbes, Perú. Se describe la anatomía de los sistemas digestivo, circulatorio, reproductor y nervioso de B. ilisima, el cual constituye la primera descripción de la anatomía interna de un Pleurobranchida para Perú.
Abstract The Pleurobranchida are sea slugs that group around 100 species distributed in the seas worldwide, but with a greater diversity in tropical and temperate coastal environments. In the Eastern Pacific, 2 families, 4 genera and more than 10 species of Pleurobranchida have been reported. The species Berthellina ilisima Marcus & Marcus 1967 common in the Eastern Tropical Pacific Province is formally recorded in coastal waters of Tumbes, Peru. The anatomy of the digestive, circulatory, reproductive and nervous systems of B. ilisima is described, which constitutes the first description of the internal anatomy of a Pleurobranchida for Peru.
RESUMEN
During the past century eight species of sea hares of the genus Aplysia were recorded from Peru. However, there is disagreement about how many of these species are valid and their taxonomy needs to be critically evaluated. Based on detailed morphological examinations, this study presents a redescription of Aplysia nigra d'Orbigny, 1837 and Aplysia inca d'Orbigny, 1837, the most common species of Aplysia along the Peruvian coast. They showed consistent morphological differences, mainly in the foot, parapodia development, opaline gland, jaws, radular teeth and penial morphology. Anatomical data for both species are provided for the first time, as well as a comparison with other species of Aplysia reported for the Eastern Pacific. The records of Aplysia keraudreni Rang, 1828, Aplysia dactylomela Rang, 1828 and Aplysia juliana Quoy & Gaimard, 1832 for Peruvian waters are likely erroneous and need to be verified based on collected specimens.