English: Apical view of the shell of Oxygyrus keraudrenii from the Pliocene. Locality: sample Anda1, Anda, Pangasinan, Luzon, Philippines. Registration number (RGM) 539 782.
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Janssen A. W. (2007). "Holoplanktonic Mollusca (Gastropoda: Pterotracheoidea, Janthinoidea, Thecosomata and Gymnosomata) from the Pliocene of Pangasinan (Luzon, Philippines)". Scripta Geologica 135. http://www.scriptageologica.nl/07/nr135/a02. Plate 16, Figure 2a.
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{{Information |Description={{en|Apical view of the shell of ''Oxygyrus keraudrenii'' from the Pliocene. Locality: sample Anda1, Anda, Pangasinan, Luzon, Philippines. Registration number (RGM) 539 782.}} |Source= Janssen A. W. (2007). "Holoplanktonic Mollu