†Chitinozoa Eisenack, 1931 - chitinozoans Order †Prosomatifera Eisenack, 1972 Family †Lagenochitinidae Eisenack, 1931 Subfamily †Ancyrochitininae Paris, 1981 Genus †Sommerochitina Costa Cruz & Quadros, 1985 1 †Sommerochitina langei Costa Cruz & Quadros, 1985