Aseelahella D. Vachard in Vachard et al., 2001 genus accepted

Kansaphyllum D.L. Baars, 1992 genus accepted

Neoprincipia P. Cózar & D. Vachard, 2003 genus accepted

Hortonella B. Mamet, 1995 genus accepted

Principia P.L. Brenckle in Brenckle et al., 1982 genus accepted

Archaeolithophyllum J.H. Johnson, 1956 genus accepted