UPPER: Egg ribbons showing large direct-developing eggs. Coffs Harbour region, New South Wales, Australia. December 1990. AM C64554.
LOWER: Rhinophores. Long Reef, Sydney, NSW, Australia, 28 Aug 1986. AM C151078. PHOTOS: Bill Rudman.
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Egg ribbon: The egg ribbon consists of a thick rigid jelly containing a coiled string of large bright orange eggs. The egg ribbon consists of one to two and one half coils. The embryos pass through a reduced veliger stage with a cap-shaped shell before hatching as benthic juveniles fourteen or fifteen days after the eggs are laid.
Rhinophores: The rhinophore stalk is short and inflated, and the ovate club has approximately ten lamellae arranged almost horizontally, with only a slight downward slope posteriorly. There is a rounded terminal knob to the rhinophore club.Authorship details
Rudman, W.B., 2002 (February 4) Rostanga arbutus - Anatomy. [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/rostarbuanat