Antecurrent see prosocline

antefrons n.pl. [L. ante, before; frons, forehead] (ARTHRO: Insecta) Frons situated anterior to the antennal base lines.

antefurca n.; pl. -furcae [L. ante, before; furca, fork] (ARTHRO: Insecta) The internal chitinous forked process projecting into the thoracic cavity from the anterior thoracic segment.

antehumeral a. [L. ante, before; humerus, shoulder] (AR-THRO: Insecta) Designating the area immediately anterior to the basal portion of the wing.

antelabrum n. [L. ante, before; labrum, lip] (ARTHRO: Insecta) The anterior part of the labrum when differentiated.

antemarginal process (ARTHRO: Insecta) In Scarabaeoidea, a process distad of the lateroproximal marginal region of the phallobase.

ante mortem a. [L. ante, before; mors, death] Before death. see post-mortem.

antenna n.; pl. -nae [L. antenna, feeler] 1. Analogous, un-segmented structures in mollusks, polychaete worms and rotifers. 2. (ARTHRO) A movable sensory appendage of various arthropods; usually segmented and located on the head above the mouth parts; most arthropods bear antennae, although some are greatly reduced; missing in all arachnids. 3. (ARTHRO: Crustacea) The second antennae proper; the second pair of appendages posterior to anten-nules; primarily sensory in function, but often adapted for other functions; derived from appendages on primitive third preoral somite; postantennal appendages; no homologous appendage in insects. see antennua, anten-nule.

antennal appendage (ARTHRO: Insecta) In Anoplura, protu berance on the first or third antennal segment of male biting lice.

antennal carina (ARTHRO: Crustacea) A prominent ridge extending posteriorly from a decapod antennal spine.

antennal club (ARTHRO: Insecta) The enlarged distal segment of a clubbed antenna.

antennal fossa (ARTHRO: Insecta) A cavity or depression in which the antenna is located; antennal groove; antafossa.

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