Sychnotylenchus

Sychnotylenchus	Contents	Rev 12/17/2024
	Classification	Hosts
	Morphology and Anatomy	Life Cycle
Return to Sychnotylenchus Menu	Economic Importance	Damage
	Distribution	Management
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Classification:

      Chromadorea
       Rhabditida
       Tylenchina
        Tylenchoidea
         Anguinidae

Sychnotylenchus Ruhm, 1956

Type species of the genus: Sychnotylenchus intricati Ruhm, 1956

Synonyms:
Neoditylenchus (Meyl, 1961)

Morphology and Anatomy:

General morphology of Sychnotylenchus is similar to that of the Anguinidae except for the shorter male and female tails.

Labial framework six-sectored with the six sectors equal or lateral sectors narrower than subdorsal and sub-ventral ones.
Esophagus with procorpus generally wide and separated from median bulb by a constriction, rarely thin and without a constriction.
Median bulb with valve, well-defined, fusiform to spherical.
Esophageal glands short, pyriform to elongate, wide.
Position of excretory pore variable from anterior to median bulb to opposite posterior end of glands.
Females: tail small, cylindroid to broadly rounded end.
Oocytes in one/two rows.
Columned uterus four rows of more than four cells (seven to fourteen cells), post-uterine sac present.

Males:

Peloderan caudal alae.
Spicules long, sometimes longer than tail.

[Ref: Fortuner and Maggenti, (1987)]

Body size range for the species of this genus in the database - Click:

Distribution:

Wood-inhabiting nematodes often as part of nematode-insect-fungi assocoations in declining forests (Rhyss et al., 2024)..

The biology of Sychnotylenchus the type genus of Sychnotylenchidae is different from that of the other Anguinidae in that the species in this genus are always found associated with bark beetles. However, they are not insect parasites but feed on the fungi that grow in the frass of the beetles.

For an extensive host range list for this genus, click

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Life Cycle:

Usually reported from leaf and woody tissues rather that from soil under the host plant.

For Ecophysiological Parameters for this genus, click

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Damage:

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Management:

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References:

Fortuner, R. and Maggenti, A.R. 1987.. A reappraisal of Tylenchina (Nemata). 4. The family Anguinidae Nicoll 1935 (1926). Revue de Nematologie 10:163-176.

Ruhm, W. 1956. Die Nematoden der Ipiden. Parasitologische SchriftenReihe 6:1-435.

Ryss, A.Y., Chalkin, A.A. Subbotin, S.A. 2024. Sychnotylenchus kulinichi sp. n. (Nematoda: Anguinoidea) from the Primorsky Krai of Russia with a tabular key to the genus Sychnotylenchus Ruhm, 1956. Nematology DOI:10.1163/15685411-bia10358