Dirona albolineata & D. pellucida interaction

April 8, 2010
From: Jackie Hildering

Wanted to share this observation of the two Dirona species [Dirona albolineata & D. pellucida] interacting. Mistaken identity? They do appear to be lining up right side to right side.

Locality: Port Hardy , 63 feet , British Columbia, CANADA, Pacific Ocean, 02 April 2010, Wall . Length: 12 cm. Photographer: Jackie Hildering.

Jackie Hildering

earthlingenterprises@telus.net

Hildering, Jackie, 2010 (Apr 8) Dirona albolineata & D. pellucida interaction. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/23435

Dear Jackie,

In your last message on Dirona albolineata [#23212] I noticed the orange tinge on one of the animals, which is part of that species' colour variability but I also noticed the larger white animal had no white line bodering the head and foot, which I thought was one of the characters distinguishing this species from D. pellucida.

There are quite a few messages on the Forum showing colour variability in this species. Unfortunately I can't see any of these details in the orange animal. Far be it from me to query your identification but how do you distinguish an orange D. pellucida from the orange form of D. albolineata. In an earlier message [#18951] it seems that D. albolineata can sometimes have the white spots I thought were characteristic of D. pellucida.

If these two animals were mating then we need a closer look at these two species. I think this is the situation where it would have been acceptable to give them a gentle 'nudge' just to see what they were up to.

Best wishes,
Bill Rudman

Rudman, W.B., 2010 (Apr 8). Comment on Dirona albolineata & D. pellucida interaction by Jackie Hildering. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/23435

Factsheet

Dirona albolineata

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