Typhloplanoida Graff, 1908 see Suborder Typhloplanida Family Trigonostomidae Graff, 1905 (1882) Genus Trigonostomum Schmidt, 1852 Trigonostomum marki Graff, 1911 see Trigonostomum penicillatum (O. Schmidt, 1857) Micoletzky, 1910