V. lyonii Powell et al. (2000)[1] Ventarura is a genus of extinct vascular plants of the Early Devonian (around 420 to 390 million years ago).
Some features, such as bivalved sporangia borne laterally and the anatomy of the xylem, relate this genus to the zosterophylls.
Spore-forming organs or sporangia were borne on the sides of the stems, attached without clear stalks.
[2] Ventarura was described too late to be included in the cladistic studies published by Kenrick and Crane in 1997 which are the source of much of the information on the phylogeny of early land plants (see Polysporangiophytes: Taxonomy).
[3] The shape of the sporangia and their lateral position as well as the anatomy of the xylem show a clear relationship to the zosterophylls.