Rhabditis gracilicauda de Man.

Allgén, C. A., 1953, Terrestrial nematodes from Jan Mayen, Annals and Magazine of Natural History 12 (6), pp. 665-688 : 687

Rhabditis gracilicauda de Man.

de Man, 1876, p. 79, pl. ix, fig. 37 a - e.

Dimensions.—Body-length = 0.603 mm., max. width= 0.0 2 0 mm., oesophagus= 0.131 mm., t a i l =0.1 7 6 mm., α =3 0.1 5, β =4.6 0, γ =3.43. Body-lcngth =0. 600 mm., max. width = 0. 0 2 0 mm., oesophagus=0.1 2 3 ram., t a i l =0.1 7 2 mm., α= 3 0. 0, β=4.88, γ= 3.4 9. Body -length=0.5 8 5 mm., max. width = 0.020 mm., oesophagus = 0-135 mm., tail =0.1 5 5 mm., α.=29.25, β =4.3 3, y =3.77.

I n its general shape this species, of which only one female and three adult specimens were f o u n d in the sample from Q7, is v e r y similar t o R. filiformis de Man, 1884 . F r o m t h a t species it differs, however, b y the evidently more elongated a n d exceedingly thin tail, in which respect it seems to be closely related t o R. gracilicauda de Man , a species regarded as s y n o n y m o u s with R. producta (A. Schneider) b y Micoletzky.