Kingdom Animalia Linnaeus, 1758 - animals Phylum †Hyolitha (Marek, 1963) see Class Hyolitha Marek, 1963 Order †Orthothecida Marek, 1966 Genus †Bactrotheca Novák, 1891 Genus †Nephrotheca Marek, 1966 Genus †Orthotheca Novák, 1887 Genus †Quadrotheca Sysoev, 1957 Genus †Tcharatheca Sysoev, 1972