An unusual polar lipid was isolated from the red alga Gracilaria verrucosa. Inositol, sphingosine bases, fatty acids, and phosphate were identified by GC and GC-MS analysis among the products of its acid methanolysis. On the basis of the lipid composition, chromatographic behavior, chemical properties, and mass spectra, the inositolphosphoceramide structure was proposed for this lipid. Similar lipids were previously found only in fungi and some protozoa. The English version of the paper: Russian Journal of Bioorganic Chemistry, 2004, vol. 30, no. 2; see also http://www.maik.ru.