Hemicycliophoroidea (Skarbilovich, 1959)
Caloosiidae (Siddiqi, 1980)
Morphology and Anatomy:
- Moderate to large animals (female: 0.60 to 1.72 mm).
- Body cylindrical.
- Cuticle with round, coarse, non-retrorse annuli, usually numbering over 200, devoid of lobes, spines, scales, but sometimes provided with superficial ornamentation;
- extra cuticular layer present, except in some species of
- typical lateral field lacking, but often irregularities in body annuli or various longitudinal markings are present, extremely variable within the same species.
- Labial area with generally two, exceptionally three annuli, generally weakly differentiated. Submedian lobes absent.
- Stylet elongated (over 50 Ám), basal knobs rounded, posteriorly sloping.
- Vulval lips usually modified;
- Single ovary.
- Tail usually elongated (rounded in some species).
Procorpus amalgamated with metacorpus,
- Tail elongated, tapering;
- conspicuous caudal alae extending beyond middle
- Spicules setaceous, long, straight, arcuate, semi-circular, U- or hook-shaped.
- cloacal lips forming a penial tube in several species.
- Hypoptygma often present.
- Males probably do not feed.
- Having the same characters as corresponding female (except for reproductive system).
- Male juveniles of fourth-stage lacking stylet in some species of
Raski and Luc, Rev. Nematol. 10(4):409-444 (1987).
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