215402
Dimorphic subdvision Like many species of the Pheidole genus , P. purpurea is dimorphic , with workers visibly differentiated by head size and shape into " minor " and " major " ( or soldier ) workers .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None