VPA 221: Veterinary Entomology and Acarology (1+1)

TYPES OF PUPA

• It is the quiescent phase between larva and imago (adult)
• Also called Chrysalis inside which the Imago is formed- (i.e) imago is the  adult insect inside pupa

Types of Pupa

Exarate or Free Pupa

• Active pupa
• The wings and legs of developing adult can be seen externally and they are free from the rest of the body. e.g. beetles

Obtectate Pupa

• The legs and wings of developing adult is bound down to the body by moulting fluid
• They can be seen externally
• The adult emerges from pupa through a ‘T’ shaped opening. e.g. Brachycera, Nematocera

Coarctate Pupa

• Last larval skin is not cast off but forms a puparium inside which adult develops
• Developing adult cannot be seen externally
• Young adult emerges out through circular opening on pupal case e.g. pupa of house fly, stable fly