First record of Gryllophila skrjabini Sergiev, 1923 and Cephalobellus magalhaesi Schwenk, 1926 (Nematoda: Thelastomatidae) parasites of Neocurtilla claraziana Saussure, 1874 (Orthoptera: Gryllotalpidae) in Argentina
Author
Rusconi, José Matias
Author
Achinelly, Maria Fernanda
Author
Camino, Nora Beatriz
text
Papéis Avulsos de Zoologia
2017
São Paulo
2017-12-20
57
37
473
480
http://dx.doi.org/10.11606/0031-1049.2017.57.37
journal article
10.11606/0031-1049.2017.57.37
1807-0205
5757345
Gryllophila skrjabini
(Sergiev, 1923)
Description
Morphology
Female:
3.4 mm
long. Cuticule conspicuously striated; first annule
17 µm
large, the following annules increases regularly until the ninth annule which is
50 µm
wide; posterior to the ninth annule a width of
30 to 40 µm
is maintained almost regularly; behind the vulva they may decrease to
10 µm
only (
Fig. 1A
). Oral opening subtriangular, surrounded by a circumoral elevation and eight labiopapillae; amphids present. Buccal cavity cylindrical,
20 µm
deep by
10 µm
wide. Oesophagus
446 µm
long, consisting of a corpus of
316 µm
by
45 µm
wide, an isthmus
30 µm
long by
35 µm
wide, and a valvular bulb
100 µm
long by
110 µm
wide. Nerve ring
184.5 µm
from anterior end of body. Excretory pore very much posterior to base of oesophagus, at about one-third of body length from anterior end (
Fig. 1C
). Intestine dilated anteriorly to form a bulky cardia, which narrows suddenly into a rather thin intestine (
Fig. 1A
). Anus
337. 5 µm
from the posterior end of body; tail conically attenuated (
Fig. 1F
). Vulva in the posterior third of the body. Two ovaries, both connected with their respective uteri at about the level of the excretory pore, the uteri running parallel in a posterior direction, uniting a little behind the level of the vulva and giving rise to a single uterus which runs anteriad, coming up to the level of the excretory pore where it is reflexed and runs backwards until it meets the vagina; vagina long (
Fig. 1E
). Ellipsoidal large eggs (
144 to 155 µm
long by
90 to 99 µm
wide), with a thick shell bearing spine-like outgrowths (
Fig. 1D
), placed in a two-cell stage and chained by a tubular structure probably formed by a mucous secretion oviduct (
Basir, 1956
;
Shah
et al.,
2012
).
Morphometry
Female
(n = 3): total length = 3451.5 ± 27 (3432-3471), cephalic diameter = 18, distance from anterior end to nerve ring = 184.5 ± 6.36 (180-189), width at level of nerve ring = 202.5 ± 6.36 (198-207), oesophagus length = 446 ± 7.07 (441-451), anterior distance to basal bulb = 329 ± 7.07 (324-334), distance from anterior end to excretory pore = 948.5 ± 4.9 (945-952), greatest width = 445 ± 5.6 (441-449), width at level of vulva = 322 ± 9.8 (315-329), vulval length = 18, vulval width = 36 V = 74% ± 1 (73%-75%), posterior end width = 265.6 ± 63 (261-270), tail length = 337.5 ± 6.3 (333-342), egg length = 147.6 ± 7.7 (144-155), egg width = 96 ± 6.3 (90-99).
Male:
not found.
Host:
adults of the mole cricket
Neocurtilla claraziana
Saussure, 1874
.
Locality:
Villa Elisa (
34°52’02”S
;
58°04’28”W
)
Site of infection:
hindgut (last part of intestine).
Prevalence:
0.3%.