Charcteristics of orders of class Polyplacophora with examples

a) Order1:Lepidopleurida

i) They have shell with valves that are not provided by 

   insertion plates or if present without insertion teeth.

   Examples:- Lepidopleurus, Hnleya

Lepidopleurus

  








        

 b) Order2:- Chitonina

             i) They have shell with valves that are provided by 

               insertion plates and insertion teeth.

     Examples:-Tonicella, Chiton, Cryptlchiton,Choneplex

Tonicella lineata

chiton