Locality

From Hollick (1930) (p. 40)

"Yukon River, north bank, at Fossil Bluff, about 6 miles above Nahochatilton (original No. 2AC238); collected by A.J. Collier and Sidney Paige in 1902 (lot 2962)."

 

Locality Map

 

Description

From Hollick (1930) (p. 40)

"Plate 28, Figure 5a"

"Onychiopsis nervosa (Fontaine) Berry. U. S. Nat. Mus. Proc., vol. 41, p. 327, 1911." (Berry 1911)

"Thyrsopteris nervosa Fontaine, The Potomac or younger Mesozoic flora: U. S. Geol. Survey Mon. 15, p. 122, pl. 25, figs. 4, 4a, 5, 16 ; pI. 37, figs. 2, 2a, 4, 4a; pl. 39, fig. 5; pl. 40, fig. 6, 1889." (Fontaine 1889)

 

Remarks

From Hollick (1930) (p. 40)

"Among the many closely related species and varieties that have been included from time to time in the genera Onychiopsis and Thyrsopteris it is difficult to select the particular one to which our specimen should be referred. It is evidently identical, however, with some one or another of the so-called species of Thyrsopteris from the lower part of the Potomac group (Patuxent formation) of Virginia, Maryland, and the District of Columbia described by Fontaine, and it agrees in all essential characters with the forms that Berry has grouped under the name Onychiopsis nervosa.

It is probable that, under some other name or names, the species has a considerably wider geographic distribution than is here recognized; but this is not the place for any such extended critical analysis of the species as would be necessary for a satisfactory investigation in this connection."