On two new Phyllidia species (Gastropoda, Nudibranchia, Doridina) and some histology from the Coral Triangle

Two new species of Phyllidia from North Sulawesi, Indonesia, Phyllidia fontjei sp. nov. and Phyllidia ovata sp. nov., are described based on morphology and molecular barcoding of CO1 and/or 16S. Both species are rare and distinctive and can be easily recognised by their colouration. Additionally, histological sections were made of the holotype of Phyllidia fontjei sp. nov. and a similarly sized Phyllidia ocellata and these morphologies are compared with the only other detailed histological examination of the Mediterranean Phyllidia flava.