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)
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    Part II
     
     
     
     
     

    Shih L. Chang (Environmental Protection Agency, Cincinnati, Oh


    Part
     I
    III
    IV
    49. (39) Lip region with rib-like armature ... Mononchoides
  • Lip region without rib-like armature . ......Diplogaster 
  • 50. (38) Esophagus with basal expansions .....51
  • Esophagus uniformly cylindrical .....60
  • 51. (50) Esophagus without mid-region expansion .....52
  • Esophagus expanded at mid-region .....55
  • 52. (51) Amphids distinct .....53
  • Amphids indistinct .......54
  • 53. (52) Stomat walls anteriorly inflated with minute tooth ..... Microlaimus
  • Stoma walls without tooth and with straight, tapering sides ..... Leptolaimus 
  • 54. (52) Stoma with 3 rod-like thickenings ..... Rhabdolaimus
  • Stoma without rod-like thickenings ..... Monochromadora 
  • 55. (51) Gonads paired ....... 56
  • Gonads single .....58
  • 56. (55) Stomal walls straight amalgamated ....57
  • Stomal walls separated, not straight ..... Alloionema 
  • 57. (56) Moderately swollen metacorpus, stoma not excessively elongate ..... ......Rhabditis
  • Elongate, cyclindrical metacorpus, stoma elongate ..... Cylindrocorpus 
  • 58. (55) Tail with sharp terminus .....59
  • Tail bluntly conical ... Cephalobus 
  • 59. (58) Anterior part of stoma a broad, open chamber ..... Panagrolaimus
    60. (50) Stoma absent or indistinct .....61
  • Stoma distinct .....63
  • 61. (60) Lip region narrow, tooth absent .....62
  • Lip region broad, small denticle apparent in stomal area ..... Tripyla 
  • 62. (61) Amphid aperture appearing as large slit ....... Amphidelus
  • Aphid aperture appearing as minute pores .... Alaimus 
  • 63. (60) Stoma narrow and long ..... Cryptonchus
  • Stoma wide and shallow ..... Bathyonchus 
  • To Part III