New record and re-description of a gall-forming aphid (Hemiptera: Aphididae), commonly confused in the north of South America, associated with an ant (Hymenoptera: Formicidae)

The gall-forming aphid Tetraneura fusiformis is recorded for the first time for Northern South America. Its identity is clarified, and descriptions of this species and that of T. nigriabdominalis, with which it is commonly confused, are offered. The association of this sap sucking insect with the ant Linepithema angulatum (Hymenoptera: Formicidae) is recorded for the first time as well