Data PolicyPublications | Persons | Institutes | Projects IMIS Photogallery » References Phyllacanthus parvispinus (peristomial ambulacrum) Description Peristomial ambulacrum: In the genus Phyllacanthus the pore-pairs are arranged biserially in contrast to most other cidarids where there is just a single row of pore-pairs.Scale 6 mm. Author Mortensen, Theodor JPG file - 115.26 kB - 566 x 821 pixels added on 2011-02-23192 viewsFrom reference Schultz, H. (2011). Sea urchins III: Worldwide regular de... © 2011 Mortensen, Theodor Click here to return to the thumbnails overview