November 10, 2007
From: Gary Cobb
Hi Bill and everyone!
Concerning your request in message #21049 - Well the wait is over. After 6 days of observing, a 38 mm long Glossodoris vespa has finally laid an egg mass. Measurements are indicated on the photos. The mass in upright and sloping inward. There are two whorls. The yolks are about .25 mm in diameter and are cream in colour. Note how gravity has pulled all the yolks to the bottom of the egg capsule which is clear and have no extra-capsular yolk. Also note two photos were taken from the the ventral view and you can see the tops raising out of focus.
Locality: Old Woman Island, Mooloolaba, Sunshine Coast, 14 m, Queensland, Australia, Pacific Ocean, 09 November 2007, Subtidal. Length: 38 mm. Photographer: Gary Cobb.
I hope this observation can of be useful.
firstname.lastname@example.orgCobb, G.C., 2007 (Nov 10) Egg mass of Glossodoris vespa. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/21104
Thanks very much. This egg mass fits Nerida Wilson's report so its very good to get some illustrations of it. She reports the development to be ametamorphic which means the larvae, as they develop, don't go through a veliger stage. The egg just begins to divide and gradually develops directly into a small crawling slug. Its interesting to see an example of an egg ribbon in which the ribbon slopes inwards.
More feeding pics of Glossodoris vespa
From: David Mullins, December 11, 2008
Glossodoris vespa feeding
From: Gary Cobb, December 11, 2008
Glossodoris vespa hatching today
From: Gary Cobb, February 8, 2008
Glossodoris vespa eggs - progress report
From: Gary Cobb, December 11, 2007
Glossodoris vespa eggs at 10 days old
From: Gary Cobb, November 21, 2007
Re: Egg mass of Glossodoris vespa
From: Gary Cobb, November 20, 2007
Re: Glossodoris vespa endemic to sthn Queensland
From: David Mullins, October 31, 2007
Glossodoris vespa endemic to southern Queensland, Austr
From: Gary Cobb, July 4, 2007
Glossodoris from Mooloolaba
From: Wayne Ellis, May 26, 1998