Stigmaria
sp.
Lycopod Root Fragment
General abundance:
Rare
wood fragments without such markings are Common
References:
A Field Guide to Fossils of Texas
second edition
page 27 photo 4
An Introduction
To Paleobotany
Chester A. Arnold - 1947
Viewer Comments:
The majority of stigmariae belongs
to the artificial species
Stigmaria ficoides, however an examination of the internal
system is necessary for the species classification. The
stigmarae are the subaerial system of rootlike rogans of the
Paleozoic lycopods such as Lepidodendron, Lepidophloios
and Sigillaria. Those connected with different plants show few
distinguishing characters that enable one to separate them.
The small circular pitlike depressions mark the places of
attachment of lateral appendages of "rootlets".
This fossil appears to be a sand cast.
Michael Orock
Pennsylvanian
Fossils of Missouri