RT journal article T1 New mitogenomes of Runcinidae and Facelinidae: two understudied heterobranch families (Mollusca: Gastropoda) A1 Galià-Camps, Carles A1 Araujo Moreira, Ana Karla A1 Carmona Barnosi, Leila A1 Martín-Hervás Santos, María del Rosario A1 Pola, Marta A1 Palero, F. A1 Cervera Currado, Juan Lucas A2 Biología K1 Mitochondrial genome K1 phylogenomics K1 neglected taxa K1 type taxon K1 systematics K1 GC content K1 specific primer design AB Here, we present the mitochondrial sequences of two sea slugs (Heterobranchia): Runcina aurata and Facelina auriculata, the latter being the type species of the family. The mitochondrial genomes are 14,282 and 14,171bp in length, respectively, with a complete set of 13 PCGs, 2 rRNAs, and 22 tRNAs. None of the mitogenomes show gene reorganization, keeping the standard mitogenomic structure of Heterobranchia. Nucleotide composition differs significantly between them, with R. aurata showing themost AT-rich mitogenome (25.7% GC content) reported to date in Heterobranchia, and F. auriculata showing a rich GC content (35%) compared with other heterobranch mitochondrial genomes. PB Taylor & Francis SN 2380-2359 YR 2024 FD 2024 LK http://hdl.handle.net/10498/34256 UL http://hdl.handle.net/10498/34256 LA eng DS Repositorio Institucional de la Universidad de Cádiz RD 13-nov-2026