Campylaimus

Fadeeva, Natalia, Mordukhovich, Vladimir & Zograf, Julia, 2016, RevIsIon of the genus Campylaimus (DIplopeltIdae, Nematoda) wIth descrIptIon of four new specIes from the Sea of Japan, Zootaxa 4107 (2), pp. 222-238 : 236-237

Key to species of Campylaimus (based on male and female characters)

1 (2) Lateral field absent.............................................................. С. abditus Bussau, 1993 . 2 (1) Lateral field present

3 (20) Lateral field a prominent narrow ala

4(15) Ventral and dorsal parallel limbs without gap between them

5 (12) Ventral and dorsal limbs almost equal in length

6 (7) Cuticular annules with transverse banding....................................... C. striatus Boucher, Helléouët, 1977 7 (6) Cuticular annules smooth

8 (9) Body> 1 mm, tail cylindrical........................................................ C. cylindricus Gerlach, 1956 9 (8) Body <1 mm, tail conical

10 (11) Index c =5........................................................................ C. minor Timm, 1961 11(10) Index c>5.......................................................................... .. C. pulcher sp.nov.

12(5) Ventral and dorsal limbs not equal in length

13(14) Small limb shorter than length of the pharynx......................................... C. inaequalis Cobb, 1920 14 (13) Ventral limb of amphid extends to the end of the pharynx.................................. C. amphidialis sp. nov 15(4) Amphid with widely spaced limbs

16 (19) Spicules cephalated at proximal end

17 (16) Spicule with gubernaculum........................................................... .. C. orientalis sp. nov. 18 (17) Spicule without gubernaculum......................................................... C. rimatus Vitiello, 1974 19 (16) Spicules non-cephalated at proximal end................................................... C. mirus Gerlach,1950 20 (3) Wide lateral field completely fused with ventral amphideal limb of equal width

21 (31) Precloacal papillae absent

22(23) Tail> 7 anal body diameter.................................................. C. siwaschensis Sergeeva, 1981 23 (22) Tail <7 anal body diameter

24(28) Lateral field 3–4 µm wide

25(26) Tail <5 anal body diameters............................................................... C. minutus sp. nov. 26 (25) Tail> 5 anal body diameters

27 (28) Spicules <20 µm long............................................................. C. gerlachi Timm, 1961 27(27) Spicules> 20 µm long........................................................... C. ponticus Sergeeva, 1981 28 (24) Lateral field>4 µm wide

29 (30) Spicules <20 µm long............................................................ C. tkatchevi Tchesunov, 1978 30 (29) Spicules> 20 µm long............................................................ C. lefeverei Gerlach, 1956 31 (21) Precloacal papillae present

32 (35) Tail tip swollen

33(34) Males with three precloacal papillae....................... C. bonariensis Villares, Martelli, Lo Russo & Pastor, 2013 34(33) Males with five precloacal papillae C. arcuatus Villares, Martelli, Lo Russo & Pastor, 2013 35(32) Tail tip not swollen................................... C. patagonicus Villares, Martelli, Lo Russo & Pastor, 2013 .