Assertion: scorpion's chelicera | /r/HasProperty | the most important appendages
Facets:
value: from a taxonomical standpoint
type: MANNER
value: historically
type: TEMPORAL
Source sentences:
text: Historically, the chelicerae were considered the most important appendages from a taxonomical standpoint since they only occurred in two general types: a eurypterid type with small and toothless pincers and a pterygotid type with large pincers and teeth.