accessory flagellum

accessory flagellum
(Order Amphipoda):
Small inner flagellum of antennule (as opposed to larger primary flagellum). Number of articles is of taxonomic importance [Stachowitsch, 1992].
(Order Isopoda):
In antenna of certain isopods, small, many-segmented flagellum projecting from fourth segment of peduncle [Stachowitsch, 1992].

Crustacea glossary. . 2011.

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