Characteristics

Characteristics:

The monophyly of Greya is based on:

  

 
• a long, narrow membranous zone on the inner surface of the valva in the male genitalia
 
• a prominent pollex on the ventral margin of the valva (one species has a pectinifer in this position; it may be retention of the ancestral state or a result of a reversal.). See figures below.
 
• reversed size dimorphism between the sexes, with males being larger than females.
 

   

 Valvae of G. enchrysa and G. piperella showing pollex.