Eudorylaimus, Andrassy, 1959

Andrássy, I., 2009, Free-living Nematodes from Albania, including the description of three new species, Nematologia Mediterranea 37, pp. 73-88 : 80-83

EUDORYLAIMUS PAR sp. n.

( Fig. 5 )

Holotype female. L = 1.98 mm; a = 28; b = 3.7; c = 32; c’ = 1.4; V = 53%.

Females (n = 2). L = 1.90-1.96 mm; a = 28-30; b = 3.7-4.0; c = 30-33; c’ = 1.4-1.6; V = 52-53%.

Males (n = 2). L = 1.80-1.86 mm; a = 30-32; b = 3.6- 3.8; c = 30–31, c’ = 1.6-1.7.

General description. Body nearly 2 mm long, moderately slender, 60-70 µm wide at middle. Cuticle smooth, 2.5-3.0 µm thick on mid-body, somewhat thinner than odontostyle at the same level. Lip region 20-21 µm wide, well offset by a depression, lips angular. Body at posterior end of oesophagus 2.8-3.3 times as wide as head. Amphids occupying nearly two-thirds of corresponding body width. Odontostyle 26-27 µm long, 1.2-1.3 times longer than labial diameter, with aperture occupying one-third of stylet length. Oesophagus 518-530 µm long, widened at its middle. Oesophageal gland nuclei clearly discernible, except for nucleus AS1. Dorsal nucleus lying at 60-62% of oesophagus length or at 15-17% of total body length. Other nuclei: AS2 = 38-39%, PS1 = 70- 73%, PS2 = 72-74%. Glandularium 197-210 µm long. Distance between posterior end of oesophagus and vulva equal to the length of oesophagus.

Female. Vulva transverse with heavily sclerotized inner lips. Vagina 45 µm, longer than half body width. Anterior gonad 4.5 body widths long or 16% of body length, posterior gonad 4.7 body widths long or 17% of body length. Uterine eggs not observed. Pre-rectum as long as 2, rectum as long as 1.2 anal body widths, the former possessing a distinct caudal blind sack. Vulva-anus distance equal to fourteen tail lengths. Tail 62-65 µm long, strongly tapered behind its middle, its ventral contour first almost straight, but ventrally curved on its sharp tip. Ventral cuticle of tail with some blisters; tip of tail with an “empty” central zone.

Male. Pre-rectum beginning within the range of supplements. Spermatozoa fusiform, 7-8 µm long. Spicula 80-82 µm long. Ventromedial supplements eight, small, separate, their row occupying 130 µm. Tail similar to that of female, 64-65 µm long, curved only on its tip.

Main characters and relationships. This new species is characterized by the shape and size of the body, thin cuticle, strongly offset head, length of the odontostyle, number of supplements, and by the shape and structure of the tail. It strongly resembles Eudorylaimus maritus Andrássy, 1959 and E. maritoides Zell, 1986 . It differs from E. maritus by the thinner cuticle (2.5-3.0 vs. 4-5 µm), more strongly separated head, longer spicula (80- 82 vs. 70-77 µm) and by the hardly bent tail possessing a central “empty” zone. It differs from Zell’s (1986) species by the shorter body (1.9-2.0 vs. 2.5-2.7 mm), and the hardly curved tail of different structure.

Type specimens. Holotype female on slide No. 14952. Paratypes: two females and two males. All in the collection of the author.

Type habitat and locality. Periferi Tiranë, along the Klos-Elbasan road, 1420 m asl; soil from a natural beech forest, collected in October, 2004 by J. Kontschán.

Etymology. Latin par means: a pair or a couple, referring to the fact that both female and male specimens occurred in the type population.

Figures

Fig. 5. Eudorylaimus par sp. n. A: anterior end; B: vulval region; C: female posterior end; D: male posterior end. (Scale bars 20 µm each).