130. 



Genus Actinolaimus Cobb, 1913 

 (Key to the species modified from Thome, 1939) 



1= Cuticle marked by longitudinal wing-like striae 2 



Cuticle without longitunidal striae ...o^.o.a....... 7 



2. Number of striae 16 . . o . . « . » . » » . papillatus Schneider, 1935 

 Number of striae 2li-U0 ».«oi><.«9<>. a«9. »»»..<>• 3 



3. Body length well over 3»0mm .o.»««^.oo«. »...»». U 

 Body length under 3»0 iwio ..i.»..»c»<.c» »<>.• 5 



U. Length near It.O mm, a = 50-60, V-39 . « o . =. costatus Schneider, 1935 

 Length 5.0 - 7.0 mm, a = 80-100, V-25 ...... radiatus Cobb, 1913 



5e Nimiber of striae 2U ,.....,,. e .,. . striatus Thome, 1939 

 Number of striae 32 or UO ,,.,»...<>.... c ...... . 6 



6. Spear length more than twice head width 



.....o... tenuiacleatus (Kreis, 1921;) Micol., 1925 



Spear length less than twice head width . . ruwenzorii de Coninck, 1935 



7. Key to females .....,, . 8 



8. Length over 5oO mm.,.....,,.,... africanus Pllipjev, 1929 

 Length near U.O mm or less. .....,,.,•.,.,....<,, 9 



9. Vulva near 69^ hutchinsoni FilipjeVj 1929 



Vulva near 50^ or less, ,....,.. . 10 



10, Body very slender, a=67 tenuis Schneider, 1935 



Body less slender, a = less than 60 .,,,,,,, , , . 11 



11, Pharyngeal walls posterior to onchia, only lightly cuticularized, , 12 

 Pharyngeal walls posterior to onchia, heavily cuticularized . . , .' 15 



12. Mural denticles present micoletzkyi Schneider, 1935 



Mural denticles absent ,...,. 13 



13. Width a = 50-60 m ichaelseni Steiner, 1916 



Width a = 32-38 lU 



lU. Head offset from body by slight constriction. . . . pooenis Gadea, 1950 

 Head without constriction ...,.,,, 15 



15, Pharyngeal walls ribbed , , surinamensis Micoletzky, 1925 



Pharyngeal walls plain neocyatholaimus Kreis, 1936 



16, Mural denticles present • 17 



Mural denticles absent .18 



17, Tail filifom, c = 6.8 filipjevi Schneider, 1935 



Tail attenuated, c = 10,7 microdentatus Thome, 1939 



