
Stigmaria are a type of branching tree root fossil found in Carboniferous rocks. They were the roots of coal forest lycopsid trees such as Sigillaria and Lepidodendron. Each trunk tended to have four of those roots. Stigmaria is a form taxon, as the genus and species of the plant bearing the root is not identified. ...
Found on
http://en.wikipedia.org/wiki/Stigmaria

• (n.) The fossil root stem of a coal plant of the genus Sigillaria.
Found on
http://thinkexist.com/dictionary/meaning/stigmaria/

(from the article `Lepidodendron`) ...known to belong definitely to Lepidodendron: cones (Lepidostrobus), leaves (Lepidophylloides, or Lepidophyllum), seeds (Lepidocarpon), and ...
Found on
http://www.britannica.com/eb/a-z/s/162
Stig·ma'ri·a noun [ New Latin See
Stigma .]
(Paleon.) The fossil root stem of a coal plant of the genus
Sigillaria .
Found on
http://www.encyclo.co.uk/webster/S/197
No exact match found.