Fig. 4. Eleven-segmented antennae in various coleopter species. (A)
Cupedidae: Tenomerga cinereus ; (B) Melyridae: Malachiinae; (C)
Chrysomelidae: Anomoea sp.; (D) Ptilodactylidae: Ptilodactyla sp.; (E)
Eucnemidae: Isorhipis obliqua. The Ptylodactylidae (D) are unique among
all insects in that the antenal segments 4 to 10 have a basal articulated
segment, rather than a simple expansion as in e.g. the Eucnemidae (E).