Females: Body shorter and stouter than in other species of the genus, 52-56 um wide at middle. Cuticle thin and smooth, 1.7-1.8 um, somewhat thicker (2.5 um) on anterior part of tail; half as thick as spear itself at level of spear. Cephalic region offset by depression, 17-19 um wide, with well separated lips; papillae conoid. Body at posterior end of oesophagus about 2.5 times as wide as head. Amphids caliciform, half as wide as corresponding body diameter. Buccal cavity wide and long. Odontostyle 23-24 um long and about 3 um thick, 1.3-1.4 times as long as cephalic diameter, or 1/20-1/22 of oesophageal length. Aperture somewhat shorter than 1/3 spear length. Oesophagus 463-498 um long, 29-32% of entire length of body, gradually widening at middle. Cylindrius typical for the genus: somewhat widened on both ends. Distance between posteior end of oesophagus and vulva considerably shorter (0.6-0.7 times) than oesophagus. Dorsal nucleus oval, 4 um, longitudinally directed; subventral nuclei round, distinctly smaller than dorsal nucleus. AS2 much closer to the two PS than to D. Average distance between dorsal nucleus and posterior nuclei somewhat shorter than in other species of the genus. Locations of oesophgeal gland nuclei given in Table 1; location following Loof and Coomans (1970): D: 60-62% AS2: 76-78%, PS1: 84-86%. PS2: 85-87%. Cardia short but fairly broad. Intestine with wide lumen and folds. Prerectum offset by constriction, 2.0-2.5 times as long as anal body diameter, with a caudal sack. Rectum 1.2-1.5 anal diameters long, straight. Vulva transverse with strongly sclerotized drop-shaped inner lips. Vagina strong, 25-28 um, nearly half as long as body diameter. Female genital organ 22-24% of body length; each gonad 2.8-3.5 body diameters long. Anterior gonad on the left, posterior gonad on the right side of intestine. Ovaries long, mostly reaching to vulva. One or two eggs in uterus: 80-83 x 49-51 um, 1.4-1.5 times as long as body diameter. Distance between vulva and anus 9-10 times as long as tail. Tail 60-74 um, 2.3-2.6 anal diameters long, or 4-5% of body length, conoid, straight or slightly bent; tip of tail regularly rounded. 'Empty' portion 23-30 um long, 40-50% of tail length. Anal muscles strongly developed.
Male: not found.
Locality and habitat
This species was first found in groundwater near River Torne-älv, Prov. Lappland, Sweden, north of the Arctic Circle, July 1962. Recently it was observed in samples from Lake Satisjaure at Vietasjokk, Lule-älv water system, Prov. Lappland, Sweden, north of the Arctic Circle, in groundwater, 440 m above sea-level, July 1963 (six females and two juveniles).
(Description- Andrássy, 1998)