Data PolicyPublications | Institutes | Persons | Datasets | Projects | Maps IMIS Photogallery » References Holopneustes porosissimus (ambulacral plates) Description a. Half column of ambulacral plates: The interporiferous zone is set with numerous irregularly arranged pore-pairs bordered by two fairly regular series.Scale 1 mm. Author Mortensen, Theodor JPG file - 136.92 kB - 979 x 646 pixels added on 2005-02-23286 viewsFrom reference Schultz, H. (2006). Sea urchins: A guide to worldwide sha... © 2005 Mortensen, Theodor Click here to return to the thumbnails overview