Complex sentence: The class Zosterophyllopsida sensu Kenrick & Crane may be restricted to this core clade, leaving many genera (e.g. "Hicklingia", "Nothia") with no systematic placement other than Lycophytina sensu Kenrick & Crane, but nevertheless still informally called "zosterophylls".
Split into simpler sentences: The class Zosterophyllopsida sensu Kenrick & Crane may be restricted to this core clade. This leaves many genera (e.g. "Hicklingia", "Nothia") with no systematic placement other than Lycophytina sensu Kenrick & Crane, but nevertheless still informally called "zosterophylls".