- Relatively slender Bunonematidae, characterized on the right
side by about 35 tubercles arranged in two rows and obliquely
offset and 1-2 midlateral tubercles anteriorly and posteriorly.
- Tubercles of various sides depending partially on location on
body: first tubercle usually large, hatchet-shaped, 2nd tubercle
almost always reduced; these and remaining body tubercles bearing
several embedded, fine rods. Polygonal network on right side fine,
with five or more figures between tubercles; tiny protuberances
which form polygon corners arising from body annules. Both
tubercles and meshlike ornamentation easily abraded, apparently
without immediate harm to the nematode.
- Lip region on right side with a triangular central
projection, with a lobed seta on each side; this seta pectinate,
with five inward-pointing bristles. Between central projection and
each pectinate seta, a minute papilla; dorsally and ventrally, a
smooth, pointed seta; on the left side, slightly thickened basal
ridges, each bearing two setiform projections
- Stoma cylindrical, only the cheilorhabdions separate; basal
bulb with symmetrical crescent-shaped thickenings of the ventral
and subdorsal rays; rods in the haustrulum slender.
- Nerve ring crossing isthmus medially.
- Excretory duct and pore at anterior level o£ basal bulb.
(xx for greater detail and drawings of cuticular ornamentation, see
Bernar, 1979)
Female:
- Stouter than male, tubercles usually larger.
- Gonads paired, amphidelphic, reflexed; the unreflexed region
serving as a combination uterus and spermatheca; sperms ameboid.
Male:
- Right side of lip region prolonged as a large papilla which is
lacking in the female .
- Testis reflexed distally about one body width.
- Bursa asymmetrical, well developed on left side, rudimentary
on right. On left side, a preanal papilla and six bursal rays: one
preanal, one anal, and four postanal; on right side, the same
complement of papillae, except for absence of the anal papilla.
- Tail tip with several pointed papillae.
- Spicules slender, cephalated, and fused distally; troughlike
gubernaculum slender except for hatchet-shaped terminus.
Ref: Bernard, 1979
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