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Cuticle finely striated.
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Lateral alae with two wings; ending at
level of phasmids in females and at base of terminal tail mucro in
males.
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Labial region crown-shaped with six
well-developed, leaflike, lips with hexaradial symmetry. Lips
separated by narrow, sometimes internally sclerotised U-shaped
clefts lacking guarding pieces. Each lip supported by a strong
radial ridge. All lips similar in shape and size. Each lip with a
minute setiform cephalic probola.
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Labial probolae absent. Lip region
with six labial and four cephalic papillae.
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Amphidial opening more or less oval.
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Stoma typically cephaloboid; cheilostom
barrel-shaped; cheilorhabdia strongly sclerotised, bacilliform in
median optical section. Gymnostom short cylindrical, as wide as
cheilostom; gymnorhabdia sclerotised, platelike in median optical
section. Stegostom cylindrical, subdivided into four sets of
rhabdia.
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Pharynx cephaloboid. Basal pharyngeal bulb
with strongly developed grinder.
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Phasmids located at 20-50% of tail length.
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Tail conoid, curved ventrad; tail terminus
bearing a terminal mucro of different shape (simple conical,
harpoon-like, arrowhead-like, forked) and size.
Ref: Holovachov and Bostrom, 2006
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