Enchodelus analatus (Ditlevsen, 1927) Thome, 1939

P. A. A. LOOF, 1971, FREELIVING AND PLANT PARASITIC NEMATODES FROM SPITZBERGEN, COLLECTED BY MR. H. VAN ROSSEN, Mededelingen Landbouwhogeschool Wageningen 71, pp. 1-86 : 65

Enchodelus analatus (Ditlevsen, 1927) Thome, 1939

( Fig. 22 ; Diagram 2).

Dimensions:

Females (n = 7): L = 1.11-1.44 mm; a = 20-26; b = 4.3- 5.2; c = 40-44; y __ 18- 2347 _ 5715 - 25

Fourth-stage juveniles (n = 3): L = 0.93 -1. 13 mm; a = 21- 26; b = 4. 1- 5. 1; c = 36 - 39; V = 50-52.

Body much stouter than in the preceding species, which it much resembles in other respects. Lip region offset by depression, walls of stomatal cavity very thick. Length of adult odontostyle 30-34 jx, of basal portion 42-46 fx; the L -4 has an odontostyle length of 20 -22 [x, and a spare odontostyle of 30- 32 jx. Basal part of spear sclerotized, but not flanged.

Oesophageal characters (three females): The oesophagus begins to widen at 66-67 %, very abruptly, and attains its full width at 70 -73 % of its length from head end; the posterior part is very wide. DO lies at, or slightly anterior to, the latter level, the distance DO- DN is 12-13 [x. Both S] N extremely indistinct, located about halfway between DN and S2N; the SxO are also less conspicuous than in most other dorylaims. The S2N are well developed. Locations:

DO 70-7 1 %; SjN 82- 83 %; S2N 88- 89 %;

DN 74- 76 %; SxO 82 - 83 %; S2090-91 %;

DO - DN 4.2 -4.9 %;

Vulva transverse, vagina one-half body width deep. Oviduct long, with distinct sphincter. No sperm. Dimensions of three intra-uterine eggs: 54-89 X 33 -34 \i. Tail broadly convex-conoid, with saccate bodies ventrally; its length 0.8 -1.1 anal body widths. Rectum 1.0-1.3 anal body widths, prerectum two to four times as long as rectum.

Samples 17, 19, 21, 25, 28, 29, 33, 34, 36, 63, 68 and 69.

These specimens differ from Ditlevsen's description in being smaller (against 1.8 mm) and having a relatively longer tail (c = 55). Ditlevsen did not mention the saccate bodies in the tail, but neither did he in the description of E. conicaudatus , so this does not amount to much. The shorter spear and more posterior vulva distinguish this species from E. macrodorus (de Man, 1880) ; the smaller body (against 2.5 mm), posterior vulva and non-flanged basal part of the spear from E.groenlandicus (Ditlevsen, 1927) .

Figures

FIG. 22. Enchodelus analatus(Ditlevsen), female. A: neck region; B: part of reproductive system; C: tail.