Nudibranch Similarities
Favorinus tsuruganus group
Flabellina exoptata group
Author: Richard Willan
Flabellina exoptata. Its consistent characters are the vivid orange rhinophores with numerous papillae on the posterior side and the central purple (or bluish violet) ring on the cerata.
Flabellina rubrolineata also has papillae on its rhinophores, but it has 3 longitudinal stripes on its body.
Flabellina delicata also has papillae on its rhinophores, but it has a purplish body and oral tentacles, and the tips of the cerata are dark purple.
Flabellina macassarana has lamellate rhinophores (i.e., numerous plate-like folds). It has a translucent pinkish to purplish white body, and the tips of the cerata are burnt orange.
Glossodoris cincta group
Author: Erwin Kodiat
These three species can be distinguished by visually observing the mantle margin.
In Glossodoris cincta, the mantle margin bordered by well-defined turquoise blue, black and gold concentric bands.
While in Glossodoris hikuerensis, they are bordered by concentric bands of brown, brownish white, dark greyish black and then brownish white.
In Glossodoris pullata, it is simply bordered by dark blue mantle margin.
(Summarized from Undersea Jewels book)
Glossodoris cruenta group
Author: Bill Rudman
Glossodoris rubroannulata is quite similar in colour to Glossodoris cruenta which differs in having a row of red spots along the inner edge of the white rather than a thin red line along the outer edge.
