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   » » Wiki: Yunia
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Yunia
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Yunia is a of extinct from the (Pragian or Siegenian stage, around ). It was first described from the Posongchong Formation of , China. The leafless plant consisted of spiny stems, some wide, which branched dichotomously at wide angles in a cruciate arrangement. Each stem contained with one or two strands of protoxylem. The spore-forming organs () were elongated and borne on short stalks. The spores had a relatively smooth sculptural pattern and were trilete (i.e. each spore has three lines on it resulting from its formation in a tetrahedral set of four spores)., p. 262

In 2004, Crane et al. published a simplified for the polysporangiophytes in which Yunia is basal to the (clubmosses and relatives). It had previously been placed in the "" (a group now thought to be paraphyletic), which were considered to have given rise to all the other vascular plants except the lycophytes.

Hao and Xue in 2013 considered the genus as a questionable zosterophyll.


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