valida...its most likely incorrect and just a generic name we use for reference just like how we name stags torts, plating montis as caps, branching montis as digitatas, ...etc.
when i had my tank running i only had a few names for my corals: tort, tenuis, aculeus, valida, microthalma, blue stag, purple stag, tyree acro, paletta acro, pretty coral, roab coral..etc..LOL