Heterocheilus

Heterocheilus	Contents	Rev 01/15/2024
	Classification	Biology and Ecology
	Morphology and Anatomy	Life Cycle
Return to Heterocheilus menu		Ecosystem Functions and Services
	Distribution	Management
Return to Heterocheilidae Menu	Feeding	References
	Go to Nemaplex Main Menu	Go to Dictionary of Terminology

Classification

Ascaridoidea

Heterocheilus Diesing, 1839

Type species of the genus: Heterocheilus tunicatus Diesing, 1839

Synonyms:

Lobocephalus Diesing, 1938

Plicatolabia Mozgovy, 1951

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Morphology and Anatomy:

With characters of Ascaridoidea sensu Chabaud (1965) and of Heterocheilinae sensu Sprent (1980).

Small to medium-sized nematodes,s; males slightly smaller than females.
Lips alate, with posterior blade-like prolongation projecting over post-labial region. Dentigerous ridges absent. Interlabia absent. Interlabial region with longitudinal ridges between posterior prolongations of lips.
Cervical papillae behind nerve ring. Excretory pore near nerve ring; excretory filaments bilateral. Cervical alae absent.
Intestinal caecum present. Ventriculus present.

Males:

Four pairs of precloacal papillae; separate paracloacal papillae.
Spicules alate.
Gubernaculum present

Females:

Didelphic
Vulva anterior to middle of body

Ref: Sprent, 1980

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

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Distribution

Intestinal parasites of sirenians (manatees).

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Economic Importance:

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Hosts:

Manatees

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Feeding

Intestinal parasites of aquatic vertebreates (Sirenians).

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Life Cycle

For Ecophysiological Parameters for this genus, click

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Damage:

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Management:

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References:

Morgovoy, A.A. 1953: [Ascaridata of animals and Man and the Diseases caused by them. Essentials of Nematodology 2.] akademiya Nauk sssr, Moscow, 616 pp. (in Russian)

Skrjabin, K.I., Shikhobalova, N.P., Mozgovoyk.i., A.A. 1951. [Key to Parasitic Nematodes. Vol. ii, Oxyurata and Ascaridata.] Akademiya Nauk SSSR Publishers, Moscow, 631 pp. (in Russian)

Sprent, J.F.A. 1980. Ascaridoid nematodes of Sirenians - the Heterocheilinae redefined. J. Helminthology 54:309-327.

Sprent, J.F.A. 1999. Species of Typhlophoros von Linstow, 1906 (Nematoda: Ascaridoidea) in Old World crocodilians. Systematic Parasitology 43:229-236.

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