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p. 1
Alethopteris laevis, Lesquereux, Geol. Penn. 2 p 865
Differs from A. nervosa, Gopp. by its entirely smooth surface, with no trace of nerves.
Coal Meannes New Philadelphia Pa.
p. 1
Alethopterus lonchitidis, Sternb Lesq. Geol. Penn. 2p 864
Frond 2-3-pinnate; pinnae open, alternate, the inferior ones bipinnatifid; the superior ones pinnatifid; pinnules open alternate, lanceolate=linear, long acute, slightly oblique, decurrent at the base, and united or distinct, convex on the margins; medial nerve broad, canaliculate, nearly excurrent; nervules perpendicular slender, close, simple or dichotomous.
Coal Measures: Cuyahoga Falls Ohio Kenawha Salines Va - Pottsville Pa Pictu & South Joggins Nova Scotia Zanesville O.
p. 2
Althopteris lonchitidis Sternb. Lesg. Geol. Penn. 2 p 864
Pecopteris lonchitica, Bronguant Hist. Veg. Foss. pl. 84 Lin. HcH. Vol. 2 p. 197 pl. 153
P. blechnoides, Brongn. Alethopteris lonchiticus & A. vulgatior, Sternb. Filicutes lonchitious Schloth. See also Am. Jour. Sc. vol. 29 p. 34 & 105 pl. 4 fig. 8, pl. 18 fig. 47, & pl. 30 fig. 4. Ortripinate
Bifinnated; lobes long narrow, usually decurrent, contracting, however, at the base towards the lower part of the punoe; accute, acuminate, or rather obtuse; towards the end of the pinnoe they become confluent, diminishing very much in size, and at last ending in a long lobe, resembling those at the base of the pinnoe both in size & form; all strongly marked by the midrib, on which are placed almost perpendicularly a number of close fine veins, usually simple, but sometimes forked.
-When the primules are decurrent, it is the A. lonchitidis- when rounded at the base the A. vulgatior.
p. 3
Carboniferous
Pottsville Pa,
Picton &, South Joggins, Nova Scotia Tallmage, Summit Co. & Zanesville Ohio, Salvies (Keuhawa river) Va.
(Also in Europe)