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Year
Total: 4
supragenus
valid
Family
Pseudopecopteridaceae
Lesq.
Sec. Geol. Surv. Pennsylvania Rept. Progr., 1884, P(3):
750.
25 Oct 1884
non-fossil
supragenus
valid
Subclass
Equisetidae
Lesq.
Rep. (Annual) Dept. Geol. Nat. Hist. Indiana, 13(1883), (2):
36.
Oct 1884
supragenus
valid
Class
Cordaitopsida
Lesq.
Sec. Geol. Surv. Pennsylvania Rept. Progr., 1880, P(2):
iv, 525.
21 Jan 1881
supragenus
valid
Family
Alethopteridaceae
Lesq.
Sec. Geol. Surv. Pennsylvania Rept. Progr., 1884, P(3):
745.
25 Oct 1884
