Pratylenchus brachyurus
(Godfrey, 1929)
Filipjev & Schuurmans Stekhoven, 1941
Syn. Anguillulina pratensis, Goodey, 1932
Pratylenchus pratensis Filipjev, 1934
Tylenchus brachyurus Godfrey, 1929
Pratylenchus leiocephalus Steiner, 1949
Measurements (from Sher & Allen, 1953)
L = 0.45-0.75 mm; a = 20-29; b = 5-6.1; c = 17-21;
V
= 83-89; spear = 19-22 um
L = 0.46-0.56; a = 27-29; b = 6; c = 21; T
=
51-53; spear = 19 um
Description (from Sher & Allen, 1953)
Female: Lateral field marked by four incisures.
Lip region angular, set off from body, bears two distinct annules.
Spear 20 um long, basal knobs large, round. Outer margins
of heavily sclerotized labial framework extend into body laterally about
one body annule. Spear-guiding apparatus extends posteriorly from
basal plate about five body annules. Orifice of dorsal esophageal
gland about 2 um behind spear base. Hemizonid just above excretory
pore, about two body annules long. Ovary does not extend to esophageal
gland, consists of single row of oocytes. Posterior uterine branch
short, about width of body at vulva. Tail rounded, no striations
around terminus.
Male: Similar to female. Single outstretched
testis. Phasmids slightly posterior to middle of tail, do not extend
into delicate bursa. Spicula arcuate, hafted, rest upon a simple
trough shaped gubernaculum.
Type host: Roots of pineapple.
Type locality: Kipapa, Hawaii.
Description (from Roman, Hirschmann, 1969)
Females: Lateral field often marked by four
incisures, but may exhibit variations. Lip region set off from body,
generally bearing two annules, occasionally with two annules on one side
and three on the other. Angular shape of lip region not always distinct,
depending on orientation of mounted specimen. Anterior end of vestibule
in en face view with pronounced refractive "ornamentation." Stylet
knobs rounded, little variation in shape. Glandular lobe of
esophagus overlapping anterior end of intestine ventrally and slightly
laterally. Hemizonid two to three annules long, located one to five
annules in front of excretory pore. Gonad measuring 100.8 to 277.2
um,
with small, empty spermatotheca. Postvulvar uterine branch 10.8 to
24.0 um long. Tail terminus rounded and smooth, little variation
in shape.
Males: Very rare; only eight specimens found. Similar
to females. L = 430-625 um; a = 21-32; b = 5.2-7.3;
c
= 18-23