Fig. 1. Electron micrographs of antennae of male Eriocrania
semipurpurella. (A) Scanning electron micrograph showing two sensilla
auricillica (arrows) and sockets from dislodged scales (arrowheads). The short
hairs present on the antennal surface are non-innervated cuticular structures
(compare C). Scale bar, 5 µm. (B) In addition to the auricillic sensilla,
trichoid sensilla (arrows) occur basally on the flagellomeres. Stout chaetic
sensilla (arrowhead) are found on the distal parts of the flagellomeres. Scale
bar, 10 µm. (C) Transmission electron micrograph showing a transverse
section of sensilla above the antennal surface (bottom) of a male E.
semipurpurella. The auricillic sensillum (au) contains numerous branches
of the dendritic outer segments, whereas the trichoid sensilla (tr) have
moderately branched dendritic outer segments. Non-innervated hairs
(arrowheads) are present between the sensilla. Scale bar, 1 µm.
