Simple categories matching chordate:

• tissue,
• trait,
• structure,
• relative,
• feature,

Members with property chordate:

• amphioxus,
• notochord,
• neural_tube,
• pharyngeal_tissue,
• pharynx,
• nerve,
• endoderm,
• tail_muscle,
• muscle,
• muscular_tail,
• brain,
• heart,
• nerve_tube,
• cns,
• pharyngeal_slit,
• tail,
• skeletal_muscle,
• gill_opening,