Re: Opisthobranch ova & capsules

October 21, 2000
From: Chad Sisson


Concerning your message. This past summer I found an extraordinarily large Dendronotus frondosus in Eastport, Maine. I collected an egg mass an was surprised to find that some of the capsules had 2 embryos. I have never seen this before in this species, and attribute it to the enormous size of the parent. The double embryo capsules developed normally and hatched with their siblings, but I do not know if they were metamorphically competent because they are planktotrophic larvae. The hatched veligers did have a shell much larger than any other D. frondosus larvae I have collected.

Unfortunately, I do not have photos or any other data to share, but if I see it again I will let you know.

Chad Sisson

Sisson, C., 2000 (Oct 21) Re: Opisthobranch ova & capsules. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Dear Chad,
Thanks for the information. I think your reply arrived within 15 minutes of me posting Cynthia's message. That must be a bit of a record!
Best wishes,
Bill Rudman.

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