Volvatella sp. 01  Genus: Pease, 1860

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Volvatella sp.01 has a light coloured shell with a moderately long posterior end.
It is Volvatella sp.1 in
Gosliner, Terrence M., David W. Behrens & Ángel Valdés. 2008. Indo-Pacific Nudibranchs and Sea Slugs. Sea Challengers Natural History Books.
Gig Harbor, Washington. 426pp. at page 64
It was posted on 30 May 2011 at these websites as Volvatella sp. A  Genus: Pease, 1860,
for some genera, such as Trinchesia was the alphabet almost through. I had to change the distinguishing alphabetic character into a number. I have chosen 2-digit numbers, even though '01' looks a little bit stupid, and now is only the genus italic written.