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Acanthodoris hudsoni

MacFarland, 1905

Robert Roy Not sure of ID on this one, possibly Adalaria jannae, or Acanthodoris lutea About 2 cm long, 10 m depth, Hussar Bay, near Port Hardy, British Columbia

Robert Roy hmm, don't think it's Doris Odhneri...

Evette Swindale Hi, found something similar in Nuweiba, Egypt at 4.5m the same size but brown/black, also was unable to find it in any reference books. I called mine a teddy bear nudi as it appears to be furry

Marli Wakeling Acanthodoris hudsoni.

Marli Wakeling It is paler in the yellow areas than most.

Gary Cobb I think this is Acanthodoris pilosa

Robert Roy Yes, I think A. pilosa is correct! Does not have yellow margin of A. hudsoni...

Marli Wakeling A.pilosa has no yellow. I will be stubborn on this one.

Gary Cobb I could not see a yellow margin and so thought it could be A. pilosa. As I look at this photo I can not make out yellow on the papillae. I can see some peppering of cream on the papillae. I know A. pilosa can have cream peppering or brown peppering on the papillae. I have attached a photo taken by Jim Anderson of A. pilosa showing some cream colouration to the papillae and no yellow margin. Hummmm...

João Pedro Silva Again, molecular studies will determine how important is the lack or presence of the yellow margin. A similar case occurs with the northern and southern variations of Cadlina laevis. http://www.seaslugforum.net/find/4793

Gary Cobb Very true Joao. Thanks! Marli don't give in!

Robert Roy Lol, it's interesting to watch the experts debate the ID of this one! I am no expert, but this nudi does not have the yellow margin at the base that seems characteristic of A. hudsoni. It does have long rhinophores that taper backwards, which according to some sources is characteristic of A. pilosi. This nudi does have a bit of yellow on its papillae but I am not sure if that would exclude it as being A. pilosi because A. pilosi is known to have significant colour variation.

Marli Wakeling Let's just call it A. hudlosa and be done with it. LOL. I may be stubborn, but I can also be wrong. I have just dug up this old photo of A. pilosa, and lo and behold, there is some faint yellow.

Gary Cobb Thank you guys for nice dialogue. You know without anaylising this animals DNA we can only hazard a guess based on what we observed in our experiences. You can see putting an ID to an a nudibranch can be tricky. Based on what I have seen I am happy with Acanthodoris pilosa. But everyone can have their own opinion - this is science!

Robert Roy I checked with a few experts who are not on Facebook, and I think the final verdict is Acanthodoris pilosa!

Animalia (Kingdom)
  Mollusca (Phylum)
    Gastropoda (Class)
      Heterobranchia (Subclass)
        Opisthobranchia (Infraclass)
          Nudibranchia (Order)
            Euctenidiacea (Suborder)
              Doridacea (Infraorder)
                Onchidoridoidea (Superfamily)
                  Onchidorididae (Family)
                    Acanthodoris (Genus)
                      Acanthodoris hudsoni (Species)
Associated Species