Complex sentence: It was initially provisionally assigned to the "rhyniophytes", but this group is defined as having terminal sporangia, whereas those of "Huia" are lateral, suggesting affinity with the zosterophylls.
Split into simpler sentences: It was initially provisionally assigned to the "rhyniophytes". However, this group is defined as having terminal sporangia, whereas those of "Huia" are lateral, suggesting affinity with the zosterophylls.