Orientatractis		Contents		Rev: 08/07/2025
		Classification		Biology and Ecology
		Morphology and Anatomy		Life Cycle
Return to Orientatractis Menu				Ecosystem Functions and Services
		Distribution		Management
Return to Atractidae Menu		Feeding		References
		Go to Nemaplex Main Menu		Go to Dictionary of Terminology

Classification:

Chromadorea

Chromadoria

Rhabditida

Spirurina

Cosmocercoidea

Atractidae

                          Orientatractis Petter, 1966

Type species of the genus: Orientatractis levanhoai Petter, 1966

    Synonyms:
     

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Morphology and Anatomy:

• Mouth surrounded by sclerotized formations, 
• Four bicornuate sclerotized pieces and four single horns around the mouth,

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Distribution:

Orientatractis Petter, 1966 is one of six genera of the cosmocercoid family Atractidaewhich include species parasitizing fishes (Moravec et al., 2025)

Orientatractis spp. are reported from fish and frogs. Species O. hamabatrachos is an intestinal parasite of frogs in New Guinea (Bursey et al., 2014).

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Feeding:

Food Sources and Feeding strategies for the genus Orientatractis

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Biology and Ecology:

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Life Cycle:

The life cycles of Orientatractis and Rondonia have not been determined, Petter (1966) claimed that tortoises became infected only after ataining sexual maturity and wondered if transmission occurred during mating.

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Ecosystem Functions and Services:

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Management:

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References:

Bursey, C.R., Goldberg, S.R., Kraus, F. 2014. New species of Orientatractis (Nematoda: Atractidae), new species of Rondonia (Nematoda: Atractidae) and other helminths in Austrochaperina basipalmata (Anura: Microhylidae) from Papua New Guinea. Acta Parasitologica 59:115-121.

Moravec, F., Salgado-Maldonado, G., Gonzalez-Solis, D. 2025. Some nematodes from fishes of the Lacant�n River in the Lacandon rain forest of Chiapas State, southern Mexico, including Cucullanus potamarii sp. n. (Cucullanidae) from the endemic catfish Potamarius usumacintae (Ariidae). Folia Parasitologica 2025, 72: 020 doi: 10.14411/fp.2025.020

Petter A.J. 1966. Equilibre des especes dans les populations de nematodes parasites du colon des tortues terrestres. Memoires du Museum national d'Histoire naturelle, Series A., Zoologie, 39, 1-252.

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Copyright © 1999 by Howard Ferris.
Revised: August 07, 2025.