Re: Petalifera ramosa with probable eggs

February 1, 2008
From: Leanne & David Atkinson

Concerning message #21237:

Dear Bill,
We've been working on that "to do list".
We found what we think is Petalifera ramosa laying eggs. You can see the start of yellow to orange zigzag of eggs under its mouth. We took quite a few photos before it left the Halophila. This doesn't look as long as the one in Ron Greer's shot, think we must have disturbed it with all the flashing and holding the seagrass to get a better shot. There are more photos than we can send in one message so we will send them over a series so your expert eye can pick the ones that show the process best. They do show that the Petalifera was moving its head from one side of the leaf to the other. You can also see that the zigzag of eggs has grown during the sequence of photos.

Locality: The Pipeline, Port Stephens, 8 metres, New South Wales, Australia, Pacific, 22 December 2007, Sandy silty bottom with scattered seagrass, sponges, ascidians, bryozoans, soft corals and gorgonians.. Length: 40 mm. Photographer: Leanne & David Atkinson.

Best wishes,
Leanne & David Atkinson

atk@hunterlink.net.au

Atkinson, L. & D., 2008 (Feb 1) Re: Petalifera ramosa with probable eggs. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/21324

Dear Leanne & David,

Thanks for your photos. I have only included a few of them here but I think we can be pretty sure now that this species lays its egg ribbon in this zigzag pattern. Which is a useful bit of information when relationships within the sea hares [Aplysioidea] are being considered.

Best wishes,
Bill Rudman

Rudman, W.B., 2008 (Feb 1). Comment on Re: Petalifera ramosa with probable eggs by Leanne & David Atkinson. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/21324

Factsheet

Petalifera ramosa

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