Fig. 1From: Diversification of the ant odorant receptor gene family and positive selection on candidate cuticular hydrocarbon receptorsThe number of functional Or genes vs. genome size in different insects. Triangle Diptera; circle Lepidoptera; open diamond/closed diamond Hymenoptera/ants; asterisk Coleoptera; plus symbol Hemiptera; open square Phthiraptera. Reference: Phthiraptera: [74]; Diptera: [32, 35, 75–80]; Hemiptera: [51, 81]; Lepidoptera: [30, 31, 82–85]; Hymenoptera: [20–28, 86, 87]; Coleoptera: [88, 89]Back to article page