@article{Oliver_2012, title={Taxonomy of some Galeommatoidea (Mollusca, Bivalvia) associated with deep-sea echinoids}, url={https://europeanjournaloftaxonomy.eu/index.php/ejt/article/view/97}, DOI={10.5852/ejt.2012.12}, abstractNote={<p>The type species of <em>Axinodon ellipticus</em> Verrill &amp; Bush, 1898 and <em>Kellia symmetros</em> Jeffreys, 1876 are re-described. It is concluded that the two species are not conspecific and that <em>K. symmetros</em> cannot be placed in the genus <em>Axinodon</em>. The family affinity of <em>Axinodon</em> is not resolved, although it is probable that this genus belongs to the Thyasiridae. <em>Kellia symmetros</em> is the type species of <em>Kelliola</em> and is placed in the Montacutidae. <em>Kelliola symmetros</em> is most probably associated with the echinoid <em>Aeropsis rostrata</em> and is not the species previously recorded from North Atlantic <em>Pourtalesia</em> echinoids under the name of <em>Axinodon symmetros</em>. This commensal associated with the North Atlantic <em>Pourtalesia</em> is here described as new and placed in the new genus as <em>Syssitomya pourtalesium</em> gen. nov. sp. nov., <em>Syssitomya</em> gen. nov. differs from all other genera in the Montacutidae by having laminar gill filaments modified for harbouring symbiotic bacteria and it is thus assumed to be chemosymbiotic. A montacutid associated with the hadal <em>Pourtalesia heptneri</em> is described as <em>Ptilomyax hadalis</em> gen. nov. sp. nov.</p>}, number={12}, journal={European Journal of Taxonomy}, author={Oliver, Graham}, year={2012}, month={Apr.} }