Ptilodictya
Unbranched, bifoliate, and proximally tapering zooarium (lanceolate), with subrectangular zooecia arranged in multiple long straight rows.
Species
Ptilodictya flagellum Nicholson
Occurrence: Whitewater
Reference: Dalvé, 1948
Ptilodictya magnifica Miller
Occurrence: Whitewater
Reference: Bassler, 1906; Dalvé, 1948
Forms broad fronds
Ptilodictya nodosa James, 1879
Occurrence: Whitewater
Reference: Bassler, 1906; Dalvé, 1948
Straight, parallel-sided frond, with strong nodes in longitudinal series.
Ptilodictya plumaria James, 1878
Occurrence: Whitewater
Reference: Bassler, 1906; Dalvé, 1948
Sword-shaped, up to 2.5 cm across; intermediate in shape between P. nodosa and P. magnifica.
