Ungella

Ungella	Contents	Rev 01/27/2026
	Classification	Hosts
	Morphology and Anatomy	Life Cycle
Return to Ungella Menu	Economic Importance	Damage
	Distribution	Management
Return to Ungellidae Menu	Feeding	References
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Classification:

Chromadorea Rhabditida Tylenchina Drilonematoidea
Ungellidae: Ungellinae

Ungella Cobb, 1928

Type species of the genus: Ungella secta Cobb, 1928

Synonyms:

Morphology and Anatomy:

Anterior of body thin; terminal portion of tail filamentous.
Cuticle thick, annulated; epidermis well-developed.
Head truncate, with paired, independently-moveable, submedian cephalic hooks on anterior surface of head. Each hook from thick bone head-like base and pointed outwardly-curved blade and directed dorsad.
Mouth shifted slightly dorsad near distal tips of blades. Stoma absent.
Amphid pocket-like, situated close to hooks base; amphidial aperture transversely elongated.
Esophagus straight, slender, from long finely muscular corpus, narrow bulb with 3 esophageal gland nuclei
Cardia prominent from two large oval cells. Intestine thin.

Female:

Monodelphic-prodelphic, ovary reflexed twice with distal tip posterior to vulva
Vulva post median

Male:

Monorchic; testis reflexed
Spicules paired and curved;
Gubernaculum thick with dorso-caudal apophysis and crurae,
Bursa absent

Ref: Ivanova and Vaucher, 2005

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

Distribution:

Parsites of the coelomic cavity of earthworms.

Feeding:

Food Sources and Feeding strategies for the genus Ungella

Parasites of the coelomic cavities of terrestrial oligochaetes

Hosts:

Earthworms

For an extensive host range list for this genus, click

Life Cycle:

Earthworms are probably the definitive and single hosts.

For Ecophysiological Parameters for this genus, click

Cobb, N.A. 1928. Ungella secta n. gen., n. sp., a nemic parasite of the Burmese Oligochaete (earthworm) Eutyphoeus rarus. Journal of the Washington Academy of Sciences. ontribution to the Science of Nematology 18: 394-397.

Ivanova, E.S., Vaucher, C. 2005. New genera and species of nematode parasites (Drilonematoidea: Ungellidae) from coelomic cavity of Neotropic acanthodrilids deposited in the Natural History Museum of Geneva, Switzerland. Rev. Suisse de Zoologie 112:943-961

Ungella

Contents

Classification:

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Morphology and Anatomy:

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Distribution:

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Economic Importance:

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Feeding:

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Hosts:

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Life Cycle:

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Damage:

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Management:

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References:

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Copyright 1999 by Howard Ferris.
Revised: January 27, 2026.

Ungella

Copyright 1999 by Howard Ferris. Revised: January 27, 2026.

Copyright 1999 by Howard Ferris.
Revised: January 27, 2026.