01319nas a2200157   4500008004100000245013300041210006900174260000900243300001000252490000700262520078400269100002101053700002401074700001801098856004501116       2000                        eng d00aAdaptive morphology of Capulus subcompressus Pelseneer, 1903 (Gastropoda : Capulidae) from Terra Nova Bay, Ross Sea (Antarctica)0 aAdaptive morphology of Capulus subcompressus Pelseneer 1903 Gast  c2000  a11-160 v233 aCapulus subcompressus Pelseneer, 1903 (Gastropoda: Capulidae) is a small epibiont gastropod living at Terra Nova Bay (Ross Sea) down to 540 m on the calcareous tubes of its unique host, the serpulid Serpula narconensis Baird, 1865. This polychaete forms bush-like aggregates which host a rich microfauna of crustaceans, hydroids and molluscs. In contrast to all other capulids, C. subcompressus shows an evident oval shell aperture, which is due to an allometric growth that call be imputed to the Serpula tube morphology. Since the allometric growth is detectable in all size classes, it could be deduced that the compressed shape of the C. subcompressus shell is the stable result of a significant evolutionary history which binds tightly these two species in Antarctic waters.1 aSchiaparelli, S.1 aCattaneo-Vietti, R.1 aChiantore, M.  uhttps://annelida.myspecies.info/node/167