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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 changed the year on 8 January 2016 into 1830.
Yonow N. (2000) synonymized Phanerophthalmus smaragdinus (Rüppell & Leuckart, 1830) [Bulla] with
Phanerophthalmus olivaceus (Ehrenberg, 1828) [Cryptophthalmus]
I changed it again on 6 November 2018 and moved it from the family Smaragdinellidae A. Adams & Reeve, 1848 into the
family Haminoeidae Pilsbry, 1895.
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
Yonow N. (2000). Red Sea Opisthobranchia 4: The orders Cephalaspidea, Anaspidea, Notaspidea and Nudibranchia: Dendronotacea and Aeolidiacea.
Fauna of Arabia. 18: 87-131.
More information on Phanerophthalmus olivaceus as Phanerophthalmus smaragdinus are on Bill Rudman's Sea Slug Forum!
How to cite:
Köhler, E. (2018), published 6 November 2018, Phanerophthalmus olivaceus (Ehrenberg, 1828)
available from https://www.Philippine-Sea-Slugs.com/Cephalaspidea/Phanerophthalmus_olivaceus.htm