Morphology and Anatomy:
Caemorhabditis auriculariae. A. Female; B. Male.
Adapetd from Tsuda and Futai 1999
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Female:
- Cuticle smooth, with fine annules.
- Lateral field with three ridges.
- Head terminates in six lips; each lip with one labial
sensillum,
- Amphids inconspicuous.
- Stoma relatively short, surrounded by short pharyngeal collar;
length of stoma averaging about two times of its width.
- Metarhabdions each with a bifid flap-like tooth (a
distinguishing character from other species).
- Pharynx with muscular terminal bulb, narrow isthmus,
metacorpus swollen to form median bulb.
- Nerve ring circles isthmus.
- Deirids between the center and the dorsal-most ridge of lateral
field,.
- Excretory pore near anterior of terminal bulb.
- Vulva a transverse slit, located at midbody.
- Gonad didelphic and dorsally reflexed,with anterior branch
longer than the posterior one.
- Oviduct forming a spermatheca containing sperm cells;
sphincter between spermatheca and uterus.
- Oviparous.
- Tail elongate with filiform tip.
Male.
- Body similar to female in general appearance, usually shorter
and thinner.
- Lateral field extending from the base of median bulb to anterior
end of bursa.
- Monorchic; testis right of the intestine,
- Male tail peloderan, bursa ellipsoid and anteriorly closed,
posterior tip typically rounded.
- Caudal papillae 2+1+3+3 pattern, papilla 6 slightly
thicker than others.
- Gubernaculum almost straight, half as long as spicule.
- Spicules robust with dorsal velum, slightly curved ventrally,
unfused, distal tips pointed.
- Anteriorly bifid cap structure on the precloacal lip.
Dauer Juveniles with closed stoma and 5 ridges in lateral field'
Ref:Tsuda and Futai, 1999
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