Class Mammalia Linnaeus, 1758 - mammals Subclass Boreosphenida Luo, Cifelli & Kielan-Jaworowska, 2001 - tribotherians see Clade Boreosphenida Luo, Cifelli & Kielan-Jaworowska 2001 Family †Holoclemensiidae Aplin & Archer, 1987, incertae sedis [monotypic] Genus †Holoclemensia Slaughter, 1968 [monotypic] 1 †Holoclemensia texana (Slaughter, 1968)