Pterophyllum fissum (Feistmantel, 1879) species doubtful

Nilssonia fissa (Feistmantel, 1879) species synonym

Nilssonia brevis Brongniart, 1825 species doubtful

Nilsonia nipponensis Yokoyama, 1889 species doubtful

Pterophyllum crassum (Morris, 1863) species doubtful

Nilsonia parvula (Heer, 1876) species synonym

Nilssonia princeps (Oldham & Morris, 1862) species doubtful

Anomozamites fissus (Feistmantel, 1879) species synonym

Nilsonia pasaytensis Penhallow, 1907 species doubtful

Nilsonia californica (Fontaine, 1894) species synonym

Nilsonia polymorpha Schenk, 1867 species doubtful

Taeniopteris gibbsii (Newberry, 1863) species doubtful

Nilsonia compta Phillips, 1905 species doubtful

Nilssonia distans (Morris, 1863) species synonym

Pterophyllum hislopianum Oldham, 1863 species synonym

Nilsonia sambucensis Ward, 1905 species doubtful

Nilsonia gibbsii (Newberry, 1863) species synonym

Nilsonia pterophylloides Nathorst, 1878 species doubtful

Nilssonia bindrabunensis Seward & Sahni, 1920 species doubtful

Nilsonia schaumbergensis Dunker, 1889 species doubtful

Nilsonia oregonensis (Fontaine, 1905) species synonym

Taeniopteris parvula (Heer, 1876) species doubtful

Nilssonia crassum (Morris, 1863) species synonym

Nilsonia johnstrupi Heer, 1882 species synonym

Nilsonia lata Dawson, 1882 species doubtful

Pterophyllum distans (Morris, 1863) species doubtful

Nilsonia stantoni Ward, 1905 species doubtful

Nilssonia sahnii Gupta, 1959 species doubtful

Nilsonia orientalis Heer, 1878 species doubtful

Pterophyllum californicum (Fontaine, 1894) species doubtful

Sapindopsis oregonensis (Fontaine, 1905) species doubtful

Nilsonia nigracollensis Wieland, 1905 species doubtful