The phospholipid composition of 30 species of brown algae belonging to
eight different orders has been analysed by TLC. A new amino acid-con
taining phospholipid was detected in members of the orders, Ectocarpal
es, Chordariales, Dictyotales, Desmarestiales, Scytosiphonales, Lamina
riales and Fucales. The occurrence of this new amino acid-containing p
hospholipid has chemotaxonomic value for brown algae.