1926 Ptilozamites nilssonii HARRIS, p. 69-70, Text-fig. 8, A, B, E;
1932 Ptilozamites nilssonii HARRIS, p. 71-75, Pl. 8, fig. 7, Text-figs. 29, 30;
1937 Ptilozamites nilssonii HARRIS, p. 35-36;

Systematics
Pteridospermopsida/Incertae sedis/Incertae sedis

Short description
Leaves tipically forked, with a symmetrical dichotomy. Pinnules usually triangular, elongated, inserted with their entire base to the rachis, entire margins and acute apex. Venation parallel, odontopteridian, simple or bifurcated. The substance of lamina and cuticles are very thick, coryaceous. Stomata have a continuous collar around the ostiole.

Discussion

Occurrence

Phytostratigraphy

Paleoecology

Material

References