Eudorylaimus illyricus, Andrássy, 2009

Andrássy, I., 2009, Free-living Nematodes from Albania, including the description of three new species, Nematologia Mediterranea 37, pp. 73-88 : 76-80

EUDORYLAIMUS ILLYRICUS sp. n.

( Fig. 3 )

Holotype female. L = 1.22 mm; a = 25; b = 3.4; c = 29; c’ = 1.5, V = 51%.

Females (n = 3). L = 1.08-1.14 mm; a = 22-24; b = 3.4-3.6; c = 32-35; c’ = 1.1-1.3; V = 52-54%.

Males (n = 3). L = 1.04-1.27 mm; a = 23-28; b = 3.8- 4.0; c = 32-35; c’ = 1.0-1.2.

General description. Body comparatively small and moderately slender, 45-50 µm wide at middle. Cuticle smooth, 2.5-3.5 µm thick. Lip region 13-15 µm wide, offset by a depression, lips angular. Body at posterior end of oesophagus 3.2-3.3 (female) or 2.8-3.0 (male) times as wide as head. Amphid about half as wide as corresponding body. Odontostyle 15-17 µm long, 1.1- 1.3 times as long as labial width; aperture occupying about one-third of stylet length. Oesophagus 280-350 µm long, enlarged somewhat behind its middle. Distance between posterior end of oesophagus and vulva 0.7-0.9 times as long as oesophagus. Oesophageal gland nuclei clearly discernible. Dorsal nucleus located at 62- 67% of oesophagus length or at 16-18% of total body length. AS1 = 22-26%, AS2 = 43-45%; PS nuclei at different levels, and the anterior one larger than the posterior: PS1 = 65-70 %, PS2 = 71-76 %. Glandularium 104-134 µm long.

Female. Vulva longitudinal, hardly sclerotized. Vagina 28-32 µm, as long as or longer than half body width. Anterior gonad 3.8-5.0 body widths long or occupying 16-20% of body length, posterior gonad 4.2-4.4 body widths long or occupying 15-18% of body length. Uterine egg not observed. Pre-rectum 1.5-2.0 anal body widths long. Vulva-anus distance equal to 13-15 tail lengths. Tail 31-42 µm long, 2.8-3.4% of total body length, straight on ventral contour, only its tip curved ventrally. Tail tip finely rounded with a central stripe.

Male. Spermatozoa fusiform. Spicula 46-48 µm long. Ventromedial supplements 10-11, spaced, their row 128- 135 µm long. Pre-rectum beginning within the range of supplements. Tail similar to that of female, 26-35 µm long, its tip ventrally curved and more or less rounded.

Main characters and relationships. Eudorylaimus illyricus is a relatively small representative of the genus with slightly offset head, short odontostyle, longitudinal and hardly sclerotized vulva, long vagina, moderate number of male supplements, and with a short tail curved at the tip. In length of the body, number of the supplements and shape and length of the tail, the new species is close to E. arcus (Thorne et Swanger, 1936) Andrássy, 1959 and E. bombilectus Andrássy, 1962 . It can be distinguished from E. arcus by the weaker odontostyle, the longitudinal vulva and the bent tip of the tail. It differs from E. bombilectus in the thin odontostyle, longitudinal and hardly sclerotized vulva and the strongly curved tip of the tail.

Type specimens. Holotype female on slide No.14949. Paratypes: three females, three males and two juveniles. All in the collection of the author.

Type habitat and locality. Periferi Gjirokastër, 4 km SW of Poliçan, by the bank of a brook, along the road from Libohovë to Sheper, 490 m asl; soil, collected in October, 2004, by J. Kontschán.

Etymology. Named after Illyria or Illyricum, the north-western region of the Balkan Peninsula, which also includes Albania.

Figures

Fig. 3. Eudorylaimus illyricus sp. n. A: anterior end; B: vulval region; C-D: female tails; E: male posterior part. (Scale bars 20 µm each).