Re: Mating Thuridilla hopei

August 1, 2002
From: Kathe R. Jensen

Dear Bill and Andreas,
Concerning your discussion - Development in Thuridilla hopei has been described by Thompson & Salghetti-Drioli (1984). It has lecithotrophic development, and both eggs and extra-capsular yolk is red at first, the colour of the eggs fading as embryological development progresses. Copulation has been described by Gascoigne (1985).

All species of Thuridilla for which egg masses have been described, have red or orange eggs, and most have extra-capsular yolk of the same colour (Jensen, 1992).

References:
• Gascoigne, T. (1985) A provisional classification of families of the order Ascoglossa (Gastropoda: Nudibranchiata). Journal of Molluscan Studies, 51: 8-22.
• Jensen, K.R. (1992) Anatomy of some Indo-Pacific Elysiidae (Opisthobranchia: Sacoglossa (=Ascoglossa)), with a discussion of the generic division and phylogeny. Journal of Molluscan Studies, 58: 257-296.
• Thompson, T.E. & Salghetti-Drioli, U. (1984) Unusual features of the development of the sacoglossan Elysia hopei in the Mediterranean Sea. Journal of Molluscan Studies, 50: 61-63.

Best wishes,
Kathe

jensen@ait.ac.th

Jensen, K.R., 2002 (Aug 1) Re: Mating Thuridilla hopei. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/7677

Thanks Kathe,
Bill Rudman

Factsheet

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