1153
The labium is immediately posterior to the first maxillae and is formed from the fusion of the second maxillae , although in lower orders including the Archaeognatha ( bristletails ) and Thysanura ( silverfish ) the two maxillae are not completely fused .
 Archaeognatha, Thysanura
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Archaeognatha, Thysanura