Marine Biodiversity and Ecosystem Functioning
EU Network of Excellence

 
Main Menu

· Home
· Contacts
· Data Systems
· Documents
· FAQ
· Links
· MarBEF Open Archive
· Network Description
· Outreach
· Photo Gallery
· Quality Assurance
· Register of Resources
· Research Projects
· Rules and Guidelines
· Training
· Wiki
· Worldconference

  

Add an imageAdd albumRSS

Photo Gallery

Photo Gallery » Species » Echinodermata (Echinoderms) » Echinoidea (sea urchins)
Echinosigra phiale (ontogeny of apical system)
Echinosigra phiale (ontogeny of apical system)
Description Development of the apical system during ontogeny. a. The plates from a continuous, compact disc, the anterior genital plate having only a single hydropore. b. The anterior genital plate begins to differentiate into two plates, G2 and G3. c. With the opening of the gonopores G3 forms a distinct plate with a second gonopore. d. The posterior part of the apical system, G1 and G4, plus ocular plates OI and OV, shifted to the posterior. The anterior part, containing ocular plate OIII, the two perforated anterior genital plates G2 and G3, and the two ocular plates OII and OIV is now separated from the posterior part. This posterior part being continuous distinguishes Echinosigra from Pourtalesia, where the posterior genital plates G1 and G4 are disrupted also from the posterior oculars OI and OV. Author Schultz, Heinke JPG file - 144.64 kB - 1 664 x 681 pixels added on 2009-02-23608 viewsERMS taxaScan of drawing Echinosigra phiale (Thomson, 1873) represented as Echinosigra (Echinosigra) phiale (Thomson, 1873)checked Kroh, Andreas 2021-02-24 From reference Schultz, H. (2009). Sea urchins II: Worldwide irregular d... Download full sizeDownload full size © 2009 Schultz, Heinke
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.

 
Quick links

MarBEF WIKI

Erasmus Mundus Master of Science in Marine Biodiversity and Conservation (EMBC)
Outreach

Science
Responsive Mode Programme (RMP) - Marie Nordstrom, copyright Aspden Rebecca
WoRMS
part of WoRMS logo
ERMS 2.0
Epinephelus marginatus Picture: JG Harmelin
EurOBIS

Geographic System

Datasets

 


Web site hosted and maintained by Flanders Marine Institute (VLIZ) - Contact data-at-marbef.org