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Photo GalleryAtelostomata (apical system)
Description The two extant orders differ in the plate scheme of the apical system: Left: Holasteroida: The arrangement is elongated, the ocular plates OII and OIV toch each other and separate the anterior (G2/G3) and the posterior (G4/G1) genital plates. The ocular plates OI and OV form the posterior end (Corystus relictus; modified after Mooi & David 1996). Right: Spatangida: The apical system is more compact, the enlarged genital plate G2 (madreporite) expands to the posterior, separating G1 and G4 and the ocular plates O I and O V (Brissus; after Mortensen 1951).Scale 2 mm. JPG file - 138.41 kB - 2 332 x 1 032 pixels added on 2009-02-232 980 viewsERMS taxaScan of drawing Spatangoidachecked Kroh, Andreas 2021-02-24Scan of drawing Brissus Gray, 1825checked Kroh, Andreas 2021-02-24Scan of drawing Atelostomatachecked Kroh, Andreas 2021-02-24Scan of drawing Holasteroidachecked Kroh, Andreas 2021-02-24Scan of drawing Corystus relictus (de Meijere, 1902)checked Kroh, Andreas 2021-02-24 From reference Schultz, H. (2009). Sea urchins II: Worldwide irregular d... Download full size ![]() Click here to return to the thumbnails overview Disclaimer: MarBEF does not exercise any editorial control over the information you may find at our species gallery. However, if you come across any misidentifications, spelling mistakes or low quality pictures, your comments would be very much appreciated. We will correct the information or remove the image from the website when necessary or in case of doubt © Copyright Notice To download: Acknowledge photographer (and copyright if different) when using these pictures in publications or web sites. VLIZ does not have copyright for these pictures, unless for those where it is explicitly stated. Click here for complete Copyright Notice. To upload: By uploading a picture you declare you have the right to do so. Please give as much information on the picture as possible; minimum requirement is photographer and/or copyright holder. Click here for complete Copyright Notice. | ![]() |
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