Cryphodera japonicum

Cryphodera japonicum	Contents	Rev 07/19/2021
	Classification	Hosts
	Morphology and Anatomy	Life Cycle
Return to Cryphodera Menu	Economic Importance	Damage
	Distribution	Management
Return to Heteroderidae Menu	Feeding	References
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Classification:

      Tylenchida
       Tylenchina
        Tylenchoidea
         Heteroderidae
          Meloidoderinae

           Cryphodera japonicum Gu, Maria, Fang, Wang & Zhuo. 2020

    Synonyms:

Morphology and Anatomy:

Female: No cyst stage.

Body globose, with projecting neck; no terminal cone.
Cuticle thick, annulated on whole body, except the vulval-anal area.
Stylet slender, with rounded knobs sloping posteriorly.
Median bulb nearly rounded, with distinct valve plates situated centrally.
Vulva terminal, lips distinctly protruding.
Anus subterminal, area between anus and vulva slightly concave.
Perineal pattern ovoid, with smooth and continuous striae.
Eggs and juveniles retained inside body.

Ref: Gu et al., 2020

Male:

Body slender, ventrally curved when heat-relaxed.
Lateral fields with three incisures.
Labial region slightly offset with a prominent labial disc and two post-labial annuli.
Stylet long and robust, cone straight, shaft cylindrical, stylet knobs well developed with distinct anterior projection.
Median bulb oval, with bead-shaped valve plates situated centrally.
Pharyngeal glands well developed, ventrally overlapping intestine.
Excretory pore conspicuous.
Testis single, anteriorly outstretched.
Spicules slender, arcuate. Gubernaculum small.
Tail short, hemispherical. Phasmids indistinct.

Reported median body size for this species (Length mm; width micrometers; weight micrograms) - Click:

Distribution:

Detected in Ningbo port of entry in Chuina from Podocarpus macrophyllus trees imported from Japan.

Hosts:

Podocarpus macrophyllus

For an extensive host range list for this species, click

Life Cycle:

No cuyst stage. Eggs and juveniles retained in distended female body.

Ecophysiological Parameters:

For Ecophysiological Parameters for this species, click	If species level data are not available, click for genus level parameters

Management:

Host Plant Resistance, Non-hosts and Crop Rotation alternatives:

For plants reported to have some level of resistance to this species, click

Gu, J., M. Maria, Y. Fang, H. Wang and K. Zhuo. 2020. A new cystoid nematode, Cryphodera japonicum n. sp. (Nematoda: Heteroderidae), from the rhizosphere of Japanese Podocarpus macrophyllus. Nematology 22:891-905.