Two furan FAs were present in the scales, 11-(3,4-dimethyl- 5-propyl-2-furyl)-undecanoic acid and 11-(3,4-dimethyl- 5-pentyl-2-furyl)-undecanoic acid. The Wrst partly overlapping with 20:4n3 and the second as a distinct peak between 20:5n3 and 22:5n3.