Paroctonchus nanjiensis		Contents		Rev: 06/16/2026
		Classification
		Morphology and Anatomy		Life Cycle
Return to Paroctonchus Menu		Economic Importance
		Distribution		Management
Return to Oncholaimdae Menu		Feeding		References
		Go to Nemaplex Main Menu		Go To Dictionary of Terminology

Classification:

Enoplea

     Enoplia

        Enoplida

          Oncholaimina

              Oncholaimoidea

                    Oncholaimidae

             Octonchinae

Paroctonchus nanjiensis Shi & Xu, 2016

Type species of the genus

    Synonyms:

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Morphology and Anatomy:

• Body length 3516-4750 um.
• Six lips with six inner labial papillae. Six outer labial setae and four cephalic setae in one circle, equal in length.
• Buccal cavity with one very large left ventrosublateral tooth, one right ventrosublateral and one dorsal tooth of medium-size, and about 27 small teeth distributed on the wall of buccal cavity.
• Amphidial fovea pocket-like with transverse slit-like aperture, in middle portion of buccal cavity.
• Cardia conspicuous and conical. 
• Tail conical-cylindrical; spinneret present

	Female: Didelphic, amphidelphic, ovaries opposed and reflexed. Vulva at 64% of body length Demanian system absent. Four subterminal setae on tail Male: Diorchic, testes opposed and outstretched. Spicules short and straight without gubernaculum.  About 10 wart-like precloacal supplements in two subventral rows. Two subventral setae near cloaca Ref: Shi and Xu, 2016
Paroctonchus nanjiensis. Male anterior. Scale bar = 30 um Drawings fron Shi and Xu, 2016
Reported median body size for this species (Length mm; width micrometers; weight micrograms) - Click:

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Distribution:

Marine nematodes, described from intertidal sediments in a sandy beach in the China Nanji Islands Natural Reserve in the East China Sea.

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Economic Importance:

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Feeding:

Considered a rapacious predator of other nematodes; partly-digested nematode body fragments observed in intestine (Shi and Xu, 2016).

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Life Cycle:

Ecophysiological Parameters:

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Management:

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References:

Shi, B., Xu, K. 2016. Paroctonchus nanjiensis gen. nov., sp. nov. (Nematoda, Enoplida, Oncholaimidae) from intertidal sediments in the East China Sea. Zootaxa 4126:097-106

Copyright © 1999 by Howard Ferris.
Revised: June 16, 2026.