| 1. |
Lip region composed of two annules
|
..................................... 2 |
| 1. |
Lip region composed of three annules
|
................................... 21 |
| 1. |
Lip region composed of four annules |
................................... 56 |
|
| 2. |
Tail terminus crenate
|
|
....................................3 |
| 2. |
Tail terminus smooth |
|
....................................7 |
|
| 3. |
Males common; spermatheca filled with sperm 
|
.................................... .4 |
| 3. |
Males rare; spermatheca empty |
..................................... 6 |
|
| 4. |
Stylet 12 -13 mm long; vulva at 80% (76 - 85); tail with
16 - 18 annules
|
P. similis
Khan & Singh, 1975
|
| 4. |
Stylet 14 -17 mm long; vulva at 73% (70 - 77); tail with
18 - 39 annules |
..................................... 5 |
|
| 5. |
Tail with 18 - 24 annules; tail terminus bluntly rounded
(occasionally smooth around tip); posterior uterine branch short, about
one vulval body width long without a rudimentary ovary
|
P. flakkensis
Seinhorst,
1968
|
| 5. |
Tail with 24 - 39 annules; tail terminus truncate or broadly
rounded with shallow notch as the top or rarely bifurcate; posterior uterine
branch long, more than two vulval body widths long with a rudimentary ovary |
P. gibbicaudatus
Minagawa,
1982
|
|
| 6. |
Lateral field with four lines ;
stylet knobs flattened, rounded; vulva at 66 - 72%
|
P. impar
Kahn & Singh, 1975
|
| 6. |
Lateral field with six lines ;
stylet knobs slightly pointed and directed forward; vulva at 79 - 86% |
P. estoniensis
Ryss, 1982
|
|
