(Psyllidae) This family has less than 150 genera including around 1,500 species found throughout the world. Small in size, no more than a fraction of millimeter, this family feeds on sap of plants using a special stylet. Members of this family are usually associated to one species of a plant or a few related plants. Their feeding can lead to the death of the plant. Due to the growing importance of psyllid-spread diseases, “International Psyllid Genome Consortium”, Texas, USA, has been established to combat this epidemic. In Qatar, a new species of psyllids was classified in Mesaieed City. It was found on Usnea that is common on the small sand dunes in Sealine area. However, this new species, called Calliardia Ummsaidensis, doesn’t cause noticeable damage to plants.
