antennule


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antennule

(ăn-tĕn′yo͞ol)
n. Zoology
A small antenna or similar organ, especially one of the first pair of small antennae on the head of a crustacean.

an·ten′nu·lar adj.

antennule

the foremost of two pairs of antennae that occur in some crustaceans; most antennae in other arthropods are homologous with the antennules of crustaceans.
References in periodicals archive ?
To our knowledge the present study is the first to use scanning electron microscopy to quantify variation in the entire structure of the cypris antennule.
Adult female holotype partially dissected as follows: habitus, right antennule, labrum, and P5 left intact and preserved in alcohol (ICML-EMUCOP-010815-11); left antennule, antennae, mandibles, maxillulae, maxillae, P1-P4 dissected (ICML-EMUCOP-010815-12) and mounted onto four slides; Colombia, Magdalena, Rodadero Bay, 11[degrees]14' North, 74[degrees]12' West; August 2015; coll.
In Chonopeltis, morphological differences include the absence of a pre-oral spine, trifoliate carpace and the absence of antennules (Tam et al.
A) Habitus, dorsal; B) Left antennule, ventral; C) Left antenna, posteromedial; D) Left antenna, anterolateral; E) Distal endopodal segment of left antenna, posterior; F) Left maxillule (MX1) and postoral process (POP), ventral.
A single pair of relatively large, ear-shaped cuticular processes is found on the anterior ventral surface between antennule bases and oral papilla (arrowed in Figs.
Another possibility is that it compares information between the left and right antennule every second and makes moment-by-moment decisions about where to move.
Based on its length, each antennule was divided into the lateral and medial flagella, and each flagellum was subsequently separated into three parts.
KEY WORDS: aesthetascs, sensory structures, chemoreception, mechanoreception, antennule, antenna, Macrobrachium rosenbergii, giant river prawn
In addition, she classified Farfantepenaeus into two groups according to the shape and position of the rostrum with respect to the segments and flagellum of the antennule and the ratio RL/CL: 1) F.