Berthella plumula
Berthella plumula - oral veil
Berthella plumula - shell
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Berthella plumula (Montagu, 1803)
Medium sized species found under rocks. The general shape is oval to elongated with a foot that is hidden below the notum. The oral veil is flattened and the rhinophores are folded. The overall colour is a pale lemon yellow to orange with net-like markings and occasional short white lines. A gill is present, visible on the right side of the body under the notum. A large internal shell is present. In juvenile specimens the shell covers most of the body.
Size range: 6-25mm

Specific characteristics: The body colour and net-like marking are sufficient characters to separate from related taxa. It may sometimes be confused with B. stellata from which it may be distinguished by the lack of a central white mark.

Identification by Dr. A. Perrone
Links:
Marine species
18mm Qajjenza <1m depth 1/4/93
Oral veil
Internal shell
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PLEUROBRANCHOMORPHA
Pleurobranchidae