- biforous spiracle
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(ARTHROPODA: Insecta)An immature\'s spiracle having two entrances (air tubes); annular-biforous spiracles.
Online Dictionary of Invertebrate Zoology. A.R. Maggenti and S.L. Gardne. 2005.
biforous spiracle
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annular spiracle — (ARTHROPODA: Insecta) 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… … Dictionary of invertebrate zoology
