Magnetic resonance imaging (MRI) has failed to distinguish between smaller gut regions and larger haemal sinuses in sea urchins (Echinodermata: Echinoidea)
1 Marine Biology Research Division, University of California at San Diego, La Jolla, CA, 92093, USA
2 California Academy of Sciences, 55 Concourse Drive, Golden Gate Park, San Francisco, CA 94118, USA
BMC Biology 2009, 7:39 doi:10.1186/1741-7007-7-39Published: 13 July 2009
A response to Ziegler A, Faber C, Mueller S, Bartolomaeus T: Systematic comparison and reconstruction of sea urchin (Echinoidea) internal anatomy: a novel approach using magnetic resonance imaging. BMC Biol 2008, 6: 33.