| 19. |
Stylet knobs slightly cupped and rounded posteriorly; body
striae coarse, about 1.7 um apart at midbody; esophageal lobes elongate,
less than twice body width
|
P. agilis Thorne
& Malek, 1968
|
| 19. |
Stylet knobs tulip-shaped which are narrow and high; body
striae fine, less than 1 um apart at midbody; long isthmus and unusually
elongate esophageal lobe three times body width |
P. tenuis
Thorne & Malek, 1968
|
|
| 20. |
Lip region high, body striae fine, about 1.2
um
apart at midbody; posterior uterine branch about equal to body width at
vulva; tail conoid to broad
|
P. scribneriSteiner,
1943
|
| 20. |
Lip region low; body striae fine, less than 1 um
apart at midbody; posterior uterine branch less than one body width at
vulva; tail cylindrical |
P. crassi Das
& Sultana, 1979
|
|
| 21. |
Tail terminus crenate or with a distinct sub-ventral or
terminal projection
|
................22 |
| 21. |
Tail terminus smooth |
.................32
|
|
| 22. |
Males unknown; spermatheca without sperm 
|
...................23 |
| 22. |
Males common; spermatheca with sperm |
...................24 |
|
| 23. |
Vulva at 69 - 78%; lateral field with six lines ;
body annulation fine
|
P. teres Khan
& Singh, 1975
|
| 23. |
Vulva at 80 - 86%; lateral field with four lines ;
annulation prominent |
P. crenatusLoof,
1960
|
|
| 24. |
Spermatheca large, elongate
|
..................25 |
| 24. |
Spermatheca round, square, or broadly oval to rectangular |
..................26 |
|
|
