Helicotylenchus, Steiner, 1945

Bohra, P., Sanyal, A. K., Hussain, A. & Mitra, B., 2010, Five new records of nematodes from East Antarctica, Journal of Threatened Taxa 2 (6), pp. 974-977 : 974-975

Helicotylenchus diagonicus Perry in Perry, Darling & Thorne, 1959 ( Fig. 1 )

Material examined: 3 females, 14.i.1999, coll. A.K.

Sanyal, Reg.No. IV/1923. Host: Moss at the bank of PDL. Measurements: Female (3): L = 0.49-0.90 mm; a =

24-26; b = 5.5-6.0; c = 50-55; V = 10-1156 - 629-10

Description:

Female: Body spiral shaped. Lip region truncated with 3-4 annules. Stylet 20-22 µm long, basal knobs flattened slightly indented anteriorly. Spermatheca offset without sperms. Phasmids at the level of anus. Tail more curved dorsally with slight ventral projection.

Abbreviations: L = body length (mm/ µm); a = body length / maximum body width; b = body length / oesophageal length; C

= body length / tail length; c´ = tail length / body width at anus; V = distance from head end to vulva x 100 / body length

µm

50

B

Male: Not found.

Distribution: Canada, Greece, India, Poland, USA.

Remarks: First report from Antarctica.

Figures

Figure 1. Helicotylenchus diagonicus A - Female Anterior region; B - Posterior region.