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The genus Phanerophthalmus has a remarkable resemblance to members of the family Aglajidae, and until quite recently was considered to be a member of that family. It is an herbivorous opisthobranch, closely related to the genus Haminoea, with a similar radula and gizzard plates.
The photographer Klaus Stiefel writes on this 2 specimens:"Found in the shallow waters next to mangrove roots, quite abundant in San Remigio."
This species was published on 21 June 2011 on these websites as Phanerophthalmus smaragdinus (Rüppell & Leuckart, 1828) [Cryptophthalmus],
I know since a few days that Rüppell & Leuckart (1828 - 1830) is online, see reference. This text was published in 2 parts,
the pages 1 - 22 in 1828, and the pages 23 - 47 in 1830. Bulla smaragdina appears on page/Seite 26 and on plate/Tafel XI,
that is the year must be 1830, and it was not desribed as Cryptophthalmus, I don't remember from where I got this information.
I changed it on 8 January 2016 into Phanerophthalmus smaragdinus (Rüppell & Leuckart, 1830) [Bulla].
Rüppell E. & Leuckart F.S. (1828-1830). Mollusca [in] Atlas zu der Reise im nördlichen Afrika von Eduard Rüppell. 1. Abth. Zoologie. 5. Neue wirbellose Thiere des Rothen Meers.
Frankfurt, H.L. Brönner pp. 1-22, pl. 1-12 , pp. 23-47 [probably 1830], page(s): 26, plate XI, Figure 2a - 2d
available online at http://www.biodiversitylibrary.org/item/114235#page/349/mode/1up
More information on Phanerophthalmus smaragdinus are on Bill Rudman's Sea Slug Forum!
How to cite:
Köhler, E. (2016), published 15 December 2016, Phanerophthalmus smaragdinus (Rüppell & Leuckart, 1830)
available from https://www.Philippine-Sea-Slugs.com/Cephalaspidea/Phanerophthalmus_smaragdinus.htm