G-protein coupled receptor specific for adipokinetic hormone/corazonin-related peptide (ACP) (EC(50)=10.25 nM). Is not activated by the closely related peptides AKH and CRZ, or other tested peptides. Highly expressed in abdominal ganglia, and also observed in the carcass, accessory reproductive tissue, testes, head, hindgut, and thoracic ganglia of adult mosquitoes. Is more expressed in adult males than in females. Much more expressed in adults than in larvae. Belongs to the G-protein coupled receptor 1 family.