†Chitinozoa Eisenack, 1931 - chitinozoans Order †Prosomatifera Eisenack, 1972 Family †Lagenochitinidae Eisenack, 1931 Subfamily †Ancyrochitininae Paris, 1981 1 Genus †Alpenachitina Dunn & Miller, 1964 2 Genus †Ancyrochitina Eisenack, 1955 3 Genus †Clathrochitina Eisenack, 1959 4 Genus †Plectochitina Cramer, 1964 5 Genus †Sommerochitina Costa Cruz & Quadros, 1985