annular spiracle
From ZooTerms (Dictionary of Invertebrate Zoology)
Revision as of 23:34, 13 September 2013 by Andreas Plank (Talk | contribs) (1 revision: import_simple_(-definition))
annular spiracle: 1. In immature Lepidoptera and Hymenoptera, simple, ring-like spiracles with a single opening with no accessory chambers.
2. In other immature insects, may be biforous, having two small or large accessory or secondary chambers usually adjacent to the margin; uniforous, when opening occurs on the margin, or multiforous if three or more openings are present.
