Ulminium pattersonensis Page, 1967 species doubtful

Ulminium mulleri Page, 1967 species doubtful

Perseoxylon antiquum Felix, 1887 species doubtful

Ulminium diluviale Unger, 1842 species doubtful

Laurinoxylon deccanense Wheeler et al., 2017 species accepted

Laurinoxylon diluviale Unger, 1883 species accepted

Laurinoxylon aromaticum Felix, 1884 species accepted

Perseoxylon californicum Platen, 1907 species doubtful

Perseoxylon eberi Platen, 1907 species doubtful

Laurinoxylon brandonianum Jeffrey & Chrysler, 1906 species accepted

Ulminium artabeae Brea, 1998 species doubtful

Ulminium mucilaginosum Brea, 1998 species doubtful

Ulminium chubutense Brea, 1995 species doubtful

Ulminium atlanticum (Romero, 1970) species doubtful

Laurinoxylon lesquereuxiana Knowlton, 1889 species accepted

Laurinoxylon branneri Knowlton, 1889 species accepted

Laurinoxylon atlanticum (Romero, 1970) species synonym

Laurinoxylon pulchrum Knowlton, 1899 species accepted

Perseoxylon aromaticum (Felix, 1896) species homotypic synonym