Pratylenchus Species Key
[Click on to see Picture Comparisons of characters]
13. Lateral field usually with six incisures on most of body ; stylet knobs rounded; valve of median bulb anterior to center 
P. hexincisus
Taylor & Jenkins, 1957
13. Lateral field with four, occasionally five lines 
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14. Vulva at 80 – 87% 
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14. Vulva at 72 – 80%
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15.  Lip region not set off, with anterior margin of apical lip annule convex, second annule wider than the first; central zone of lateral field with oblique striae; tail terminus rounded or slightly oblique 
P. neglectus (Rensch, 1924)
15. Lip region set off, cup-like with first annule larger thansecond; central zone of lateral field without oblique striae; tail terminus almost clavate
P. neocapitalus Khan & Singh, 1975
16. Stylet 14.5 – 15 um long 
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16. Stylet 15 um or more long
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17. Lip region high; “a” and “c” ratios greater (a = 26 – 32; c = 16 – 25); intestinal fasciculi present; tail conoid with a characteristic indentation on tail terminus 
P. jordanensis Hashim, 1983
17. Lip region low; “a” and “c” ratios smaller (a = 16.6 – 17; c = 12.7 – 13.5); intestinal fasciculi absent; tail cylindrical to broadly rounded with a smooth, rounded terminus 
P. stupidus Romaniko, 1977
17. Lip region low; “a” and “c” values smaller (a = 14.3 – 15; c = 17.5 – 18); intestinal fasciculi absent; tail with a variable tail terminus which has a broad process with a large acute terminal annule
P. variacaudatus
Romaniko, 1977
18. Basal esophageal lobes elongated, nuclei in tandem 
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18. Basal esophageal lobes broad, nuclei not in tandem
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