Protobarinophyton

Kenrick and Crane in 1997 placed the genus Protobarinophyton along with two species of Barinophyton in the Barinophytaceae in their Sawdoniales, well nested within the zosterophylls.^[1] A summary cladogram produced by Crane et al. in 2004, shows Protobarinophyton in the core of a paraphyletic stem group of broadly defined zosterophylls, basal to the lycopsids (living and extinct clubmosses and relatives).^[2]

The phylogenetic position of the barinophytes remains disputed. Taylor et al. in 2009 considered the barinophytes to be possible lycopsids rather than zosterophylls.^[3] Hao and Xue in 2013 suggested that they were not lycopsids, instead falling between this group and the euphyllophytes.^[4]

• Cladogram from Crane, Herendeen & Friis 2004

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