Family APHELENCHOIDIDAE

                                 Revised 08/28/08

Classification:

      Secernentea
       Tylenchida
        Aphelenchina
         Aphelenchoidea
          Aphelenchoididae

Morphology and Anatomy:

      Family characterized by large metacorpus (median bulb), esophageal glands 
      usually not enclosed in a bulb (overlapping). Dorsal esophageal gland 
      opens into metacorpus.  Males have caudal papillae.  Often, but not 
      exclusively, associated with ferns, gymnosperms, and monocotyledons; also 
      with insects.
      Maggenti suggests that the Aphelenchina are an earlier evolutionary group 
      than the Tylenchina.

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