The first phylogenetic study of Goniobranchus annulatus (Mollusca: Nudibranchia) in subtidal area of Chabahar, Oman Sea, Iran:, based on sequence of cytochrome oxidase C subunite I gene

Nudibranches are the largest group of Hetrerobranches, (a sub-branch of Opisthobranchia) and are widespread and cosmopolitan species. They vary in shape and colors and occur in all waters from intertidal to deep sea zones and from polar to the tropics regions. Nudibranches are subdivided in two main groups including Anthobranchia and Cladobranchia. In the present study, based on morphology the svudied species was identified as Goniobranchus annulatus that belong to Anthrobranchia group. In molecular analysis the sequences of the partial mitochondrial COI gene of Goniobranchus annulatus species from Iran with 15 similar sequence of nudibrnaches from genbank were compared. Phylogenetic based on Neighbor_joining analyze showed a monophyly relationships between families of nudibranches and also revealed that Goniobranchus vibratus is a sister taxa to the Gonidbranchus annulatus from Iran Goniobranchus annulatus with 100% bootstrap support.