Syn. Dorylaimellus hopedorus Thorne, 1929
Measurements (from Choi, Geraert & Baek, 1997)
L = 1703 um; a = 32.8; b = 5.3; c = 62.1; V = 47.5
(Description from Choi, Geraert & Baek, 1997)
Female: Body tapering slightly towards both extremities.
Lip region set off by slight constriction. Odontostyle 2.2-2.5 lip region
width long. Amphids funnel-shaped. Guide ring 21-23 um from
anterior end. Basal expanded portion of oesophagus 41-46% of neck
region. Cardia rounded, tongue-shaped. Prerectum 4-5.5 and
rectum about one anal body-width long. Vulva a transverse slit.
Oviduct and uterus separated by well developed sphincter. Ovaries
reflexed. Tail 0.8-0.9 anal body widths long with 2 caudal pores
on each side. Tail blunt, dorsally convex-conoid, usually containing
19-15 pairs of saccate bodies.
Discussion. The measurements and other characters are
similar to E. hopedorus but in the Korean specimens the odontophore
does not show basal flanges.
Localities and habitat. Chiri Mt., Kurye-gun (Pinus
densiflora S. et Z.)
(Description from Thorne, 1929)
This species differs from Dorylaimellus virginianus
the type, and only species described, in that the basal third of the spear
is made up of six sections. The short hemispherical tail is very
different from the conoid tail of the type species.
The body is marked by excessively fine striae.
There are no wings. The convex-conoid neck ends in a slightly set
off lip region bearing two circlets of low innervated papillae. The
broad amphids are stirrup-form with deep inner extensions leading to sensilla
pouches. The spear is of three parts, the anterior a cylindrical,
straight, heavily cutinized section twice as long as the width of the lip
region, a second cylindrical less cutinized part five-eights as long as
the first and a basal portion as long as the second part but only slightly
cutinized. When viewed in cross section this basal portion is found
to be made up of six sections. The esophagus is slightly narrowed
at first then expands in an elongate bulb followed by a tube about one-third
the neck width that suddenly expands near the middle to form the basal
portion which is three-fifths as wide as the neck. The conoid cardia
is one-fifth the body width and submerged in the intestine. The intestine
is about four cells in circumference and often is green in color,
doubtless due to the vegetable matter on which the nema feeds. From
the depressed vulva the cutinized vagina leads half way across the body.
The two symmetrical ovaries are reflexed half their length the front being
on the right, the rear on the left, side of the body. The eggs are
one and one-half times as long as the body width and one third as wide
as long. As man as four may occur at one time. From the slightly
depressed anus the rectum leads forward, being about one anal body diameter
in length. The prerectum is about three times as long as the rectum.
Pores lie somewhat past the middle of the tail.
It was very numerous in the collections. This
may be related to Dorylaimus macrodorus deMan.
This species is placed in Dorylaimellus only tentatively.
A study is being made of this and several other related species and it
may be necessary to establish a new genus to receive them.
DNA Sequences Obtained