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Genus Alethopteris
5-Felices 3 Pecopteridae
Genus Alethopteris, Sterhb? & Gopp.
Frond bipinnate or tripinnate or by tripinnatifid; secondary nerves rising perpendicularly or obliquely from the medial one, simple or dichotomous, and many times forked; margins of the pinnules often revolute; front unknown.
Alethopteris Aquilina
Alethopteris Aquilina Gopp. Esq. Geol. Penn 2p 864-Pecopteris aquilina Brongt
Frond bipinnatifid; pinnules very open, close, oblong, obtuse, united at the slightly decurrent base, or sometimes separated to the rachis; terminal leaflets oblong obtuse; secondary nerves perpendicular to the medial one, either bifurcate or with the nervules simple.
Coal Meannes U. States?
p. 2
Alethopteris distans, Lesquereux Geol. Penn 2p 865 pl 12 fig 2
Frond bipinnated; prime open linear=lanceolate; pinnules alternate, linear distant, crenulate, enlarged but distinct at the base; united only in the upper part of the terminal pinnae where they become broader, shorter, and obtuse; secondary nerves obsolete.
Coal Meannes Muddy Creek Pennia.