Relating to or characteristic of cladoselache or primitive sharks of that type.
From 'Cladoselache' + '-ian' (relating to). Standard adjectival form used in paleontology since the late 1800s.
When paleontologists call something 'cladoselachian,' they're saying it shares features with these ancient sharks—a helpful shorthand for describing 360-million-year-old creature blueprints.
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