Hammerschmidtiella Chitwood, 1932

Shah, Manjur, 2011, Nematode parasites of invertebrates from Manipur, North East India (Diagnosis, keys and illustration), Zootaxa 3107, pp. 1-37 : 21

Key to all known species of Hammerschmidtiella Chitwood, 1932

1. Presence of pear-shaped eggs......................................... H. hochi Jex, Schneider, Rose & Cribb, 2005

- Oval eggs or ovoid eggs that are flattened on one side.........................................................2

2(1). Male with multiple crest or ridges behind anus........................................ H. cristata Spiridonov, 1984

- Multiple crest or ridges behind anus absent in male...........................................................3

3(2). Presence of highly curved corpus over end bulb in female oesophagus.................... H. poinari Gupta & Kaur, 1978

- Corpus not curved in female oesophagus................................................................... 4

4(3). Vulva provided with three cuticularised plates......................................... .. basiri Singh & Kaur, 1988

- Vulva without plates................................................................................... 5

5(4). Caudal papillae and spicule present in male................................................................. 6

- Caudal papillae and spicule absent in male................................. H. aspiculus Biswas & Chakravarty, 1963

6(5). Spicule=18µm long....................................................................................7

- Spicule more than 18µm long............................................................................ 9

7(6). Female= 1.926–2.022mm long.......................................................... H. acreana Kloss, 1966

- Female more than 2.022mm long......................................................................... 8

8(7). Female= 2.20–3.77mm and tail= 0.250–0.290mm; male= 0.520–0.560mm ............................................................................................ H. mackenziei (Zervos, 1987) Adamson & Van Waerebeke, 1992

- Female=3.0– 3.33mm and tail 0.78mm; male= 0.81–0.96 mm ................................. H. manohari Rao, 1958

9(6). Female= 1.81mm long; spicule=20µm long............................................ H. singhi Rao & Rao, 1965

- Female=more than 1.81mm long; spicule=more than 20µm long...............................................10

10(9). Male= 0.487–0.853mm long.................................... H. diesingi ( Hammerschmidt, 1838) Chitwood, 1932

- Male = more than 0.853mm long........................................................................ 11

11(10). Caudal papillae in male=5pairs, gubernaculum present........................ .. H. andersoni Adamson & Nasher, 1987

- Caudal papillae = 3 pairs, gubernaculum absent.................................... H. nayrai Serrano Sanchez, 1945