Campylaimus, Cobb, 1920

Villares, Gabriela, Martelli, Antonela, Russo, Virginia Lo & Pastor, Catalina, 2013, Three new species and one new record of Campylaimus (Diplopeltidae, Nematoda) from Argentine coasts (Buenos Aires and Santa Cruz, Argentina), Zootaxa 3613 (1), pp. 83-96 : 94-95

Key to species of Campylaimus

(Based on male characteristics)

1 Oral opening ventral...................................................................................2

- Oral opening dorsal.................................................................................... 4

2 Anterior border of the amphids anterior to oral opening....................................................... 3

- Anterior border of the amphids posterior to oral opening..................................... C. gerlachi Timm, 1961

3 One testis........................................................................ C. inaequalis Cobb, 1920

- Twotestes......................................................................... C. mirus Gerlach, 1950

4 With precloacal papillae................................................................................ 5

- Without precloacal papillae.............................................................................. 7 5 Tail with swollen tip................................................................................... 6

- Tail without swollen tip.......................................................... C. patagonicus Villares, 2012

6 With three precloacal papillae..................................................... C. bonariensis Villares, 2012

- With five precloacal papillae......................................................... C. arcuatus Villares, 2012

7 Gubernaculum absent.................................................................................. 8

- Gubernaculum present................................................................................. 10

8 Lateral field varying in width and is interrupted along the body lenght....................... C. ponticus Sergeeva, 1981

- Lateral field continuous over the body length................................................................ 9

9 Body longer than 1200 µm.......................................................... C. lefeverei Gerlach, 1956

- Body shorter than 800 µm........................................................... C. rimatus Vitiello, 1974

10 Tail conical......................................................................................... 11

- Tail cylindrical.......................................................... C. striatus Boucher & Helléouët, 1977

11 Value of a less than 20........................................................... C. tkatchevi Tchesunov, 1978

- Valueof a greater than 30.................................................. C. abnormis Thanh & Gagarin, 2011