MEASUREMENTS
(all measurements in um except L in mm).
|
Locality |
Guyane 13
|
Guyane 17
|
|
|
|
|
Female
|
Female
|
J4
|
|
n |
2
|
8
|
1
|
L |
2.6, 2.8
|
2.4+ 0.1
(2.2 - 2.8)
|
2.1
|
a |
53.6, 53.1
|
48.3 + 3.5
(41.3 - 52.6)
|
45
|
b |
4.8, 6
|
5.3 + 0.6
(4.6 - 6.3)
|
2.7
|
c |
81.1, 88.3
|
77.9 + 8.8
(63.2 - 88.7)
|
58.6
|
c' |
0.7, 0.6
|
0.7 + 0.1
(0.6 - 0.8)
|
0.74
|
V |
47, 46
|
45.1 + 0.9
(44 - 46.4)
|
-
|
Tail |
31.5, 31.5
|
31 + 3.8
(27 - 37)
|
35
|
Lip region diam. |
18, 18.5
|
15.5 + 1.1
(14 - 17)
|
15
|
Odontostyle |
151, 147
|
144.6 + 5.4
(140 - 153.5)
|
132
|
Repl. odontostyle |
-
0
|
-
|
149
|
Odontophore |
86.5, 95
|
86.8 + 2
(85 - 90)
|
82
|
Stylet |
237.5, 242
|
231.3 + 7.2
(225.5 - 242)
|
214
|
Guiding ring |
148, 146
|
136.8 + 4.5
(133 - 147)
|
127
|
Nerve ring |
241, 266
|
252.9 + 7.5
(247 - 264.5)
|
227
|
Hemizonid |
226, -
|
214.1 + 5.1
(207 - 224)
|
-
|
h |
11, 10.5
|
9.3 + 0.8
(7.5 - 10)
|
10.5
|
h% |
35, 33
|
30.4 + 4.7
(20 - 34)
|
30
|
|
|
DESCRIPTION
Female: Habitus weakly to moderately
curved ventrally. Lip region 6-7 um high, slightly offset
from rest of body. All specimens were flattened to various degrees,
this possibly affecting the lip region shape and width. Amphid apertures
7-9 um wide, at 6-7 um from anterior end, occupying about
52% of the lip region width. Body pores conspicuous; distribution
in neck region: twelve to thirteen laterally, nine to ten ventrally, three
dorsally. Vestigium small, 1.5 um long, difficult to see.
Basal flanges 17.5-20.5 um wide. Reproductive system with
anterior genital branch reduced and incomplete: ovary absent, oviduct reduced
to a mass of cells (23-29 um long), sphincter, pars dilatata
uteri (48-55 um long), and uterus (63-78 um long) recognisable
but reduced. Posterior genital branch complete with ovary 73-83 um
long, convoluted oviduct 40-48 um long, pars dilatata oviductus
37-43 um long, sphincter and uterus with pars dilatata uteri
28-33
um
long, and uterus without Z-differentiation and with tubular part 138-175
um long. Ovejector 48-60 um long. In a few females,
an accumulation of small rounded cells, reminiscent of sperm cells, present
at the distal end of the posterior genital tract where the gonad reflexes
(this may point to hermaphroditism in this species, but this needs confirmation).
Tail tapering to broadly rounded terminus with main curvature on the dorsal
outline. In some severely flattened specimens, the tail appearing
almost hemispherical. Blind terminal canal absent. Two pairs of caudal
pores clearly seen on tail, posterior to anal opening; one pair located
laterally near tail terminus and one pair located almost at level of anal
opening in a sublateral position.
Male: not found.
Juvenile: General appearance as in
female. Genital primordium 52.5 x 32 um.
(Description- Swart & Quénéhervé,1998)
Specimens from Costa Rica
Xiphinema
costaricense (1)
Xiphinema
costaricense (2) |
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