Cotylenchus

Cotylenchus	Contents	Rev 01/05/2026
	Classification	Hosts
	Morphology and Anatomy	Life Cycle
Return to Cotylenchus Menu	Economic Importance	Damage
	Distribution	Management
Return to Anguinidae Menu	Feeding	References
	Go to Nemaplex Main Menu	Go to Dictionary of Terminology

Classification:

Tylenchida
   Tylenchina
    Tylenchoidea
     Anguinidae
      Anguininae

Cotylenchus Alvarez-Ortega & Subbotin, 2024

Type species of the genus: Cotylenchus cleo Alvarez-Ortega & Subbotin, 2024

Synonyms:

Molecular and morphological analysis, and feeding habits, indicated that the tylenchid nematode extracted from fern plants, Polystichum munitum, differed from all currently described members of Anguinidae sufficiently to warrant erection of a new genus.

Body 1.0-1.2 mm, slender cylindrical, straight to slightly arcuate .
Cuticle striated. Lateral field with six incisures.
Lip region low, continuous with body contour. Cephalic framework weakly sclerotised.
Stylet robust (12.0-13.5 um), knobs distinctly rounded with anterior surface slightly sloped posteriorly.
Pharyngeal corpus nearly cylindrical; metacorpus oval, with well-developed valve; basal pharyngeal bulb pyriform to elongate, abutting intestine.
Tail elongate-conical, terminus pointed.

Female:

Vulva a transverse slit. Vagina at right angles to body axis.
Post-vulval uterine sac present.
Monodelphic, prodelphic; oary outstretched, oocytes in single row.
Spermatheca oblong, with or without rounded sperm.

Ref: Alvarez-Ortega and Subbotin, 2024

Male:

Monorchic
Bursa well developed, extending less than half length of tail

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

Back to Top

Distribution:

Type species described from a rainforest in western Wahington State, USA

Back to Top

Economic Importance:

Back to Top

Feeding:

Food Sources and Feeding strategies for the genus Cotylenchus

The type species, C. cleo, can be cultterd on fungi: Botrytis and Fusarium

Back to Top

Hosts:

Type species a foliar pathogen of the sword fern, Polystichum munitum.

For an extensive host range list for this genus, click

Back to Top

Life Cycle:

For Ecophysiological Parameters for this genus, click

Long term persistence of plant-parasitic species may be aided by the ability to feed on fungi. Related taxa demnstrate the ability to survive in an anhyhrobiotic state in dry host tissues,

Back to Top

Damage:

Back to Top

Management:

Back to Top

References:

Alvarez-Ortega, S., Subbotin, S.A. 2024. Cotylenchus cleo gen. n., sp. n., a new plant-parasitic nematode (Tylenchida: Anguinidae) parasitising on leaves of western sword fern plants from rainforests in Washington State, USA. Nematology 26: 579-592.

Cotylenchus

Contents

Classification:

Back to Top

Morphology and Anatomy:

Back to Top

Distribution:

Back to Top

Economic Importance:

Back to Top

Feeding:

Back to Top

Hosts:

Back to Top

Life Cycle:

Back to Top

Damage:

Back to Top

Management:

Back to Top

References:

Back to Top

Copyright © 1999 by Howard Ferris.
Revised: January 05, 2026.

Cotylenchus

Copyright © 1999 by Howard Ferris. Revised: January 05, 2026.

Copyright © 1999 by Howard Ferris.
Revised: January 05, 2026.