The complete mitochondrial genome of the photosymbiotic sea slug Berghia stephanieae (Valdés, 2005) (Gastropoda, Nudibranchia)

Abstract

Berghia stephanieae (Nudibranchia, Cladobranchia) is a photosymbiotic sea slug that feeds exclusively on sea anemones from the genus Exaiptasia. It then specifically incorporates dinoflagellates belonging to the Symbiodiniaceae obtained from their prey. Here, we present the complete mitochondrial genome sequence of B. stephanieae combining Oxford Nanopore long read and Illumina short-read sequencing data. The mitochondrial genome has a total length of 14,786 bp, it contains the 13 proteinencoding genes, 23 tRNAs, and two rRNAs and is similar to other nudibranchs except for the presence of a duplicated tRNA-Ser 1.

The complete mitochondrial genome of Spurilla braziliana MacFarland 1909 (Nudibranchia, Aeolidiidae)

“…The gene order is identical to that of Sakuraeolis japonica and Hermissenda emurai , both of which belong to the superfamily Aeolidioidea, the same as S. braziliana. Berghia stephanieae, which belongs to the same family, Aeolidiidae, as S. braziliana, has been reported to exhibit tRNA-Ser 1 gene duplication (Clavijo et al 2021). However, this feature was not observed in S. braziliana.…”

“…(Yu et al 2018), Glossodoris acosti (MZ823409), Hypselodoris festiva (KU365323) , Verconia nivalis (OL800586) (Do et al 2022), Polycera hedgpethi (MZ713367), Triopha modesta (MW387958) (Do et al 2022), Doris odhneri (OL800585) (Do et al 2022), Asteronotus hepaticus (MW559976), Carminodoris armata (OL800584) (Do et al 2022), Notodoris gardineri (DQ991934) (Medina et al 2011), Phyllidiopsis krempfi (MT726194) (Kim et al 2021), Phyllidiella pustulosa (MK279705) , Roboastra europaea (AY083457) (Grande et al 2004), Phestilla sp. (ON553001), Dermatobranchus otome (MT527185) (Do et al 2020), Tritonia diomedea (KP764765) (Sevigny et al 2015), Melibe leonina (KP764764) (Sevigny et al 2015), Sakuraeolis japonica (KX610997) , Hermissenda emurai (MK279704) , Berghia stephanieae (MW027646) (Clavijo et al 2021).…”

The complete mitochondrial genome of Spurilla braziliana MacFarland 1909 (Nudibranchia, Aeolidiidae)

“…Berghia stephanieae , which belongs to the same family, Aeolidiidae, as S. braziliana , has been reported to exhibit tRNA-Ser 1 gene duplication (Melo Clavijo et al. 2021 ). In our S. braziliana sample as well, gene duplications of tRNA-Ser were observed, and these tRNAs exhibited a unique secondary structure with a missing D-arm ( Supplementary Data 2 ).…”