Interactive Diagnostic Key to Plant Parasitic, Freeliving, and Predaceous Nematodes

by

UNL Nematology Lab

Adapted from:
An Illustrated Key to Nematodes Found in Fresh Water 
Armen C. Tarjan (University of Florida, Lake Alfred)
Robert P. Esser (Florida Department of Agriculture, Gainesville)
 
 

Part IV
 

Shih L. Chang (Environmental Protection Agency, Cincinnati, Ohio)

Part
 I
II
III

 
82. (72) Stoma wide and shallow, conspicuous, 
  tail filiform....... Prismatolaimus
  • Stoma narrow, elongate, collapsed or inconspicuous .....83


  • 83. (82) Gonad single ..... Cylindrolaimus
  • Gonads paired .....84 


  • 84. (83) Amphids inconspicuous ..... Tripyla
  • Amphids conspicuous ..... Aphanolaimus 


  • 85. (71) Terminal fifth or sixth of esophagus an ovoid bulb ..... 86
  • Esophagus uniformly cylindrical, stoma with massive teeth ......Ironus 


  • 86. (85) Cuticular punctations present .....87
  • Cuticular punctations absent .....89


  • 87. (86) Amphids not spiral .....88
  • Amphids spiral .... Achromadora


  • 88. (87) Four longitudinal rows of cuticular markings present .... . Chromadora
  • No longitudinal rows of cuticular markings present ..... Prochromadorella 


  • 89. (86) Amphids distinct ....90
  • Amphids indistinct ..... Butlerius 


  • 90. (89) Female gonad double, amphid hook-shaped .....Anonchus
  • Female gonad single, amphid circular .... Monhystrella 


  • 91. (70) Lip region annulated, not set off ..... Atylenchus
  • Lip region smooth, set off .... Eutylenchus 


  • 92. (69) Esophagus with basal expansion .....93
  • Esophagus uniformly cylindrical .....98


  • 93. (92) Cuticular punctation present, amphids not circular ......94
  • Cuticular punctation absent, amphids circular........97


  • 94. (93) Ocelli (eye spots) present ...... 95
  • Ocelli absent .....96 


  • 95. (94) Stoma with three equal-sized teeth ..... Chromadorina
  • Stoma with at least one large tooth ..... Punctodora 


  • 96. (94) Cuticule with lateral longitudinal rows of punctation ..... Hypodontolaimus
  • Cuticle without lateral differentiations ..... Chromadorita 


  • 97. (93) Esophageal bulb valvate ..... Prodesmodora
  • Esophageal bulb without valves ..... Odontolaimus 


  • 98. (92) Amphid anterior on body .....99
  • Amphid posteroirly located ..... Bastia 


  • 99. (98) Amphid spiral ..... Paracyatholaimus
  • Amphid cup-shaped or obscure .....100 


  • 100. (99) Stomal teeth massive ..... Oncholaimus
  • Stomal teeth small ...... Tobrilus 



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