GTP-binding protein that may be involved in protein trafficking; may modulate vesicle budding and uncoating within the Golgi apparatus. Plays a role in male tail tip morphogenesis (PubMed:21408209). Localizes to cytoplasmic granules (puncta) during the later stage of male tail tip retraction. Expressed in neuronal cells (PubMed:21408209). Expression in hypodermal tissues is absent (PubMed:21408209). Expressed at low levels in hyp8-11 tail tip cells during the early L4 larval stage (PubMed:21408209). Occassionally, expression is high in hyp10 tail top cells during this time (PubMed:21408209). RNAi-mediated knockdown results in male tail tip defects. Belongs to the small GTPase superfamily. Arf family.