byAdapted from:
Part III
Shih L. Chang (Environmental Protection Agency, Cincinnati, Ohio)
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64.
(1) Body symmetrical .....65
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65. (64) Lip appendages
not elaborate .....66
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66. (65) Lateral
lip appendages thorn-like directed laterally .....
Diploscapter
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67. (66) Papillae
or setae horn-like .....
Macrolaimus
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68. (65) Lip appendages
forked and elaborately fringed .......
Acrobeles
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69.
(1) Post-cephalic setae absent .....70
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70. (69) Stylet absent ....71
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71. (70) Teeth absent,
minute or indistinct .....72
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72. (71) Esophagus
with basal expansions .....73
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73. (72) Amphids
oval, spiral, or stirrup-shaped .....74
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74. (73) Amphids
spiral ....75
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75. (74) Cuticular
punctations absent .....76
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76. (75) Esophageal bulb
without valves .....77
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77. (76) Esophageal-intestinal
valve elongate ......
Paraplectonema
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78. (75) Labial region characteristically
flap-like .....
Euteratocephalus
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79. (74) Amphids oval .....
Greenenema
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80. (73) Esophageal-intestinal
valve shortened .....81
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81. (80) Excretory pore
and large excretory gland present .....
Domorganus
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