lagena (foraminifera) lagena (foraminifera) lagena is a genus of foraminifera in the superfamily nodosariacea. lagena illustration of lagena sulcata (e) and lagena marginata (f) scientific classification domain: eukaryota (unranked): sar (unranked): rhizaria phylum: retaria subphylum: foraminifera order: lagenida superfamily: nodosariacea family: lagenidae genus: lagenawalker & boys, 1784 species more than 500 synonyms capitellina marsson, 1878 ectolagena a.silvestri, 1900 lagena (capitellina) franke, 1925 (subgenus) lagenulina terquem, 1876 pygmaeoseistron patterson & richardson, 1987 vermiculum montagu, 1803