Relating to or characterized by adelarthrosomata; having primitive or indistinct arthropod body structures.
From 'adelarthrosoma' plus the adjectival suffix '-tous,' describing the characteristics or qualities of having unclear joint-like body structures.
This is the kind of ultra-specific scientific term that only parasitologists and acarologists (mite scientists) would use regularly—it's technically precise but disappeared from mainstream science years ago.
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