Double layer of cuticle.
Lateral field with 4 incisures.
Labial probollae twice as long as cephalic probollae, each fringed
with 6-8 tines, apical tines T-shaped.
Esophageal
corpus cylindrical, corpuse 4x longer than isthmus.
Excretory pore very anterior, 10-24 annules from head.
Tail of both sexes usually short.
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