Odontopharynx

Odontopharynx	Contents	Rev: 03/08/2023
	Classification	Biology and Ecology
	Morphology and Anatomy	Life Cycle
Return to Odontopharynx Menu		Ecosystem Functions and Services
	Distribution	Management
Return to Odontopharyngidae Menu	Feeding	References
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Classification:

Chromadorea
Diplogastria
Diplogastrida
Diplogastroidea: Odontopharyngidae

Odontopharynx De Man, 1912

Synonyms:

Morphology and Anatomy:

Adults and juveniles similar, no sexual dimorphism.
Body elongate, cylindrical; tail long, filiform. Anterior terminus broadly flattened; without distinct lips.
Cuticle with fine transverse striae, longitudinal striae absent.
Twelve cephalic sensory papillae arranged in a single whorl, inner and second circlets joined; sensilla basiconica (externally peg or cone shaped).
Amphid openings distinct, transversally elongate oval; posterior to lip region, upper third of stoma.
Stoma large; anterior globose, narrowing posteriorly, telostome not elongated; armed with teeth. One large dorsal tooth, anterior half of stoma, movable; numerous smaller teeth, at level of dorsal tooth, not movable.
Posterior 25% of stoma armed; small teeth in separate sets, several teeth per set, teeth in each set fused at base.
Dorsal esophageal gland opens through dorsal tooth.
Three part esophagus: corpus cylindrical, heavily muscled, without swelling or valve; isthmus short; posterior bulb glandular, swollen, not valved.
Excretory system diplogasterid type (a single canal extending anteriorly and posteriorly to the ventral gland and excretory duct), excretory cell distinct. .
Tail long, filiform, terminus minute.

Ref: Chitambar and Noffsinger, 1989

Anterior of Odontopharynx longcaudata

Photo by J. Chitamber

Females:

Amphidelphic, monovarial, ovary reflexed, two postuterine sacs,
Spermatheca absent.

Males:

Monorchic, testis reflexed.
Two spicules, unequal size; left spicule normal; right spicule reduced, minute, triangular.
Gubernaculum complex, without dorsal apophysis.
Bursa absent.
Posterior papillae present, numerous; preanal, anal, and postanal; usually paired but some single

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

The type species, Odontopharynx longicaudata, can be cultured on the bacterivore, Acrobeloides sp. on 1.5% water agar. Such cultures faciliate study of the development and behavior of the nematode.

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Life Cycle:

For Ecophysiological Parameters for this genus, click

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Ecosystem Functions and Services:

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Management:

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References:

Chitambar, J.J., Noffsinger, E.M. 1989. Taxonomy and postembryonic stages of the nematode predator Odontopharynx longicaudata de Man, 1912 (Diplogasterida). J. Nematology, 21:189-201.

Odontopharynx

Contents

Classification:

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Morphology and Anatomy:

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Distribution:

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Feeding:

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Biology and Ecology:

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Life Cycle:

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Ecosystem Functions and Services:

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Management:

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References:

Copyright © 1999 by Howard Ferris.
Revised: March 08, 2023.

Odontopharynx

Copyright © 1999 by Howard Ferris. Revised: March 08, 2023.

Copyright © 1999 by Howard Ferris.
Revised: March 08, 2023.