Cosmocercoides

Rizvi, Anjum Nasreen, 2009, Two new species of amphibian nematodes from Bhadra Wildlife Sanctuary, Western Ghats, India., Zootaxa 2013, pp. 58-68 : 63-64

Key to the species of Cosmocercoides

Key to the 18 species of Cosmocercoides is being provided for the first time.

1 Lateral alae present ....................................................................................................................................................... 2

- Lateral alae absent ...................................................................................................................................................... 13

2 Somatic papillae present ............................................................................................................................................... 3

- Somatic papillae absent ............................................................................................................................................... 7

3 Esophagus with 1 or 2 prebulbar swelling.................................................................................................................... 4

- Esophagus lacking prebulbar swelling ......................................................................................................................... 5

4 Esophagus with one prebulbar swelling ............................................................................................. C. multipapillata

- Esophagus with two prebulbar swelling ............................................................................................... C.nainitalensis

5 Male with median papillae.............................................................................................................................. C.tridens

- Male lacking median papillae ....................................................................................................................................... 6

6 Male with both rosette and simple papillae ..................................................................................................... C.rickae

- Male lacking simple papillae ........................................................................................................................ C.kumaoni

7 Male with 2 equal spicules............................................................................................................................................ 8

- Male with unequal spicules..................................................................................................................... C.barodensis

8 Male less than 2 mm in length ................................................................................................................. C.lanceolatus

- Male more than 2 mm in length................................................................................................................................... 9

9 Median papilla present............................................................................................................................... C.variabilis

- Median papilla absent ................................................................................................................................................. 10

10 Gubernaculum present ................................................................................................................................................ 11

- Gubernaculum absent ............................................................................................................................... C.microhylae

11 Esophagus with prebulbar swelling ................................................................................................................ C.bufonis

- Esophagus without prebulbar swelling…………………………………….. ............................................................ 12

12 Gubernaculum less than 50um................................................................................................................. C.oligodentis

- Gubernaculum more than 50 um ...................................................................................................................... C. ranae

13 Male with somatic papillae ................................................................................................... C.karnatakaensis sp.nov.

- Male lacking somatic papillae .................................................................................................................................... 14

14 Male with both rosette and simple papillae ................................................................................................................ 15

- Male lacking simple papillae ...................................................................................................................................... 17

15 Male with gubernaculum ............................................................................................................................................ 16

- Male lacking gubernaculum ................................................................................................................................. C.lilloi

16 Male with many simple preanal papillae ........................................................................................................ C.pulcher

- Male lacking simple preanal papillae ......................................................................................................... C.tibetanum

17 Male with equal spicules .................................................................................................................................... C.dukae

- Male with unequal spicules ............................................................................................................................. C.fotedari