Data PolicyPublications | Persons | Institutes | Projects IMIS Photogallery » References Palaeobrissus hilgardi (peristomial area) Description Peristomial area: The labrum is formed like a mushroom and slightly arched at the peristomial edge.Scale 5 mm. Author Mortensen, Theodor JPG file - 72.08 kB - 564 x 643 pixels added on 2009-02-23416 viewsFrom reference Schultz, H. (2009). Sea urchins II: Worldwide irregular d... © 2009 Mortensen, Theodor Click here to return to the thumbnails overview