Assertion: eurypterid | /r/HasProperty | pterygotus
Facets:
Source sentences:
text: They consist of the primitive number of segments (seven), show the simplicity of segmentation by the subequality of the individual segments and possess a sharply pointed, practically clawless terminal segment, strikingly resembling those of some eurypterids (Pterygotus) and differing greatly from those of the recent scorpions.
text: The second largest eurypterid known is Pterygotus.