What's the difference between flabellum and labellum?

Flabellum

Definition:

(n.) A fan; especially, the fan carried before the pope on state occasions, made in ostrich and peacock feathers.

Example Sentences:

(1) A new subspecies, Diplodinium flabellum laterospinatum n.
(2) The subspecies is characterized by a peculiar structure of genital appendages of imago and a smaller number of rays in a big flabellum of larval mandibles.
(3) and allied species in having two dark longitudinal stripes on the dorsum and by the structure of genitalia in adult insects, by the number of setae in the great flabellum, by the structure of submentum and shape of the ventral incision in larvae and by the branching pattern of respiratory threads in pupa.

Definition:

(n.) The lower or apparently anterior petal of an orchidaceous flower, often of a very curious shape.
(n.) A small appendage beneath the upper lip or labrum of certain insects.

Example Sentences:

(1) On each side of the labellum there are 11 "largest" hairs (LH).
(2) Electrophysiological recordings showed that gustatory chemosensilla were located on the labellum, tip of labrum, labral food canal, foretarsi, tibia, and antennae.
(3) Taste hairs are located on the labellum and tarsi of blowflies.
(4) Some lines also show expression associated with other chemosensory organs at either the larval or adult stage, including the maxillary palps, labellum, and anterior wing margin.
(5) The neurons associated with the anteriormost (LH-1), posteriormost (LH-11), and one lateral (LH-6) hair on the labellum were stained selectively with cobaltous sulfide.
(6) Mature larvae protrude their anterior ends from the tip of the labellum.