FIGURE 1. A in Repeatability and precision in proboscis length measurements for long proboscid flies

FIGURE 1. A. Three specimens of Philoliche gulosa showing the proboscis in various states of preservation: maximum ventral rostral membrane (VRM) displacement, moderate VRM displacement, full retraction of the prementum into the head (from top to bottom); B. Extension of the VRM changes the appearance of the proboscis length of two specimens with similar proboscis lengths (PL= prementum length, MFL=Maximum Functional length, C2T= Clypeus to tip length); C. Close up of proboscis belonging to top-most specimen in A and B above (SIM 1807B), showing the disarticulation of the syntrophium from the VRM and prementum (LBR=labrum, part of syntrophium).