Dendrodoris sp. or Doriopsis granulosa ?

January 30, 2006
From: Yukari Tani


Dear Dr.Bill,
I could not show you this Sea slug's gills because we did not see them, yet.
We always can find it in the neighborhood of Doriopsis pecten (maybe).

Locality: Saipan, Northern Mariana Islands, Pacific Ocean. Eelgrass Beds. Depth: 1.5 m. Length: 5 mm. 4 January 2006. on the dead coral across blue sponge. Photographer: Yukari Tani

Would you tell me which one this is, please ?
Best regards,
Gon

dswith@isletwind.com

2006 (Jan 30) Dendrodoris sp. or Doriopsis granulosa ?. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/15626

Dear Gon,
If it is on this deep blue sponge, Terpios, then I am pretty sure it is Doriopsis pecten. Even if you can't see the fan-shaped gills, in your photo alongside the flat shelf-like flap over the gill pocket is clearly visible - and that is only found in species of Doriopsis. If look at the Fact Sheets on D. pecten and D. granulosa you will see that both species can have a greenish brown form. D. granulosa is usually found on an orange-yellow sponge and appears to have a different sized and coloured egg ribbon. 
Best wishes,
Bill Rudman

Rudman, W.B., 2006 (Jan 30). Comment on Dendrodoris sp. or Doriopsis granulosa ? by Yukari Tani. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/15626

Factsheet

Doriopsis pecten

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