A NEW SPECIES MYLONCHULUS · WASIMI ( MONONCHIDA : NEMATODA ) FROM SOUTH 24-PARGANAS , W . B . , INDIA

A new species Mylonchulus wasimi n. sp. under the genus Mylonchulus Cobb (1916) from South 24-Parganas, West Bengal, India, has been described and il1ustrated. No male, but eight female representatives are found under this proposed new species. The genus Mylonchulus is under the family Mylonchulidae Jairajpuri (1969) and subfamily Mylonchulinae Jairajpuri (1969). The present species was colIected during July, 2004. Jairajpuri and Khan (198 I) mentioned 34 species under the genus Mylonchulus and Andrassy (1992) provided the key of 56 species under this genus.


INTRODUCTION
A new species Mylonchulus wasimi n. sp.under the genus Mylonchulus Cobb (1916) from South 24-Parganas, West Bengal, India, has been described and il1ustrated.No male, but eight female representatives are found under this proposed new species.The genus Mylonchulus is under the family Mylonchulidae Jairajpuri (1969) and subfamily Mylonchulinae Jairajpuri (1969).
The present species was colIected during July, 2004. Jairajpuri and Khan (198 I) mentioned 34 species under the genus Mylonchulus and Andrassy (1992) provided the key of 56 species under this genus.

MATERIALS AND METHODS
Nematodes were extracted from soil samples using 'Baermann's Funnel Method' (Christie and Perry, 1951), fixed in hot, diluted 4% FA (formalin-acetic acid mixture) (Seinhorst, 1966), mounted in anhydrous glycerin and sealed properly.Preserved specimens were observed under different magnifications with an Olympus BX-51 trinocular light microscope (Olympus Inc., Japan).Figures were drawn with the aid of a Camera Lucida attached to the microscope.Images were captured with a CCD digital camera system (CooISnapPro) integrated with the microscope.amphid aperture cup-shaped and its opening 13.8% of the adjacent body width, buccal capsule mylonchuloid type.Nerve ring situated at about 22% of oesophageal length from anterior end.
Oesophagus long, slender; oesophago-intestinal junction non-tuberculate.Gonad didelphicamphidelphic, anterior gonad shorter than the posterior gonad mostly; ovary reflexed at both the side, pars p roxima lis, pars refringes and pars distalis vagina are prominent.A distinct liplike protuberance at the opening of vulval region; one pre-and one post-advulval papillae present, though variations in their riumber (pre-advulval papillae: 0-2 and post-advulval papillae: 0-2) were found.Tail one anal diameter long.Shape of the tail is digit-like and dorsally bent.
Caudal glands three in number, large and much developed; clear spinneret with sub-terminal openIng.
Male: Not found.

Table 1 .
: Measurements of Mylonchulus wasimi n. sp.(n = numbers, all measurements are in ~m, only 'L is in mm).