Interactive Key to Nematodes Part III

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 III

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

Part
I	II	IV

64. (1) Body symmetrical

.....65

Body asymmetrical, bearing series of protuberances on side

.... Bunonema

65. (64) Lip appendages not elaborate .

....66

Lip appendages elaborate

......68

66. (65) Lateral lip appendages thorn-like directed laterally ..

... Diploscapter

Lateral lip appendages not thorn-like or directed laterally .....67

67. (66) Papillae or setae horn-like .

.... Macrolaimus

Lips flap-like and pointed anteriorly

..... Teratocephalus

68. (65) Lip appendages forked and elaborately fringed

....... Acrobeles

Lip appendages membranous and wing-like

..... Wilsonema

......Tylocephalus

69. (1) Post-cephalic setae absent

.....70

Post-cephalic seate present (may be very faint Ex. Tobrilus) .

....92

70. (69) Stylet absent

....71

Stylet present ..

...91

71. (70) Teeth absent, minute or indistinct .

....72

Teeth usually present, prominent

.....85

72. (71) Esophagus with basal expansions

.....73

Esophagus uniformaly cylindrical ..

...82

73. (72) Amphids oval, spiral, or stirrup-shaped

.....74

amphids circular

...80

74. (73) Amphids spiral

....75

Amphids not spiral ......79

75. (74) Cuticular punctations absent

.....76

Cuticular punctations present

....78

76. (75) Esophageal bulb without valves ..

...77

Esophageal bulb valvate

...... Plectus & Anaplectus

77. (76) Esophageal-intestinal valve elongate .

..... Paraplectonema

Esophageal-intestinal valve shortened ...

.. Paraphanolaimus

78. (75) Labial region characteristically flap-like ..

... Euteratocephalus

Labial region not flap-like, lips bluntly rounded

..... Ethmolaimus

79. (74) Amphids oval ...

.. Greenenema

Amphids stirrup-shaped ..

.... Chronogaster

80. (73) Esophageal-intestinal valve shortened

.....81

Esophageal-intestinal valve elongate .

... Desmolaimus

81. (80) Excretory pore and large excretory gland present ..

... Domorganus

Excretory pore and gland indistinct or absent .

.... Monhystera