A congenital malformation of the systemic heart complex inSepia officinalis L. (Cephalopoda)
© Biologische Anstalt Helgoland 1998
In semi-adultSepia officinalis L. (Cephalopoda) from the Bay of Arcachon (France) a congenital malformation of the systemic heart is described by macro-and microscopical methods. It concerns an atypical doubling of the site of insertion at the cephalic aorta at the apical ventricle. Its comparison with the paired anlagen of the systemic heart complex in normal embryogenesis and the central circulatory system ofNautilus gives rise to interpret it as a form of atavism. The possible causal role of mutagenic antifoulings is discussed.