Domorganus suecicus		Contents		Rev: 08/11/2022
		Classification		Biology and Ecology
		Morphology and Anatomy		Life Cycle
Return to Domorganus Menu				Ecosystem Functions and Services
		Distribution		Management
Return to Ohridiidae Menu		Feeding		References
		Go to Nemaplex Main Menu		Go to Dictionary of Terminology

Classification:

Chromadorea

  Chromadoria

       Plectida

Plectina

            Ohridiidae

 

       Domorganus suecicus Holovachov, 2012

   Synonyms:

     

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Morphology and Anatomy:

• Body spindle-shaped, tapering anteriorly and posteriorly.
• Cuticle annulated; , without ornamentation. Lateral field present, consist of two alae (three incisures).
• Epidermal glands and somatic sensilla absent.
• Labial region bluntly rounded, continuous with the body contour, lips fused.
• Inner and outer labial sensilla indistinct. Cephalic sensilla setiform, directed outward.
• Amphidial fovea circular, 3.5–4.0 µm wide, located immediately posterior to the level of stoma.
• Nerve ring surrounding pharynx just posterior to the median pharyngeal bulb.
• Secretory-excretory system present; renette cell elongate, located posterior to the pharynx base
• Excretory pore at level of basal pharyngeal bulb.
•  Buccal cavity narrow tubular; cheilostom with small bar-shaped rhabdia; gymnostom cylindrical, with parallel, thin walls; stegostom short, its slender muscular lining continuous with that of corpus.
• Stoma and anterior part of pharynx arched to the ventral side by the pressure of the fusus amphidialis.
• Narrow radial tubes originate at base of stoma and extend posteriorly.
• Pharynx cylindrical anteriorly, with elongate-ovoid median bulb anterior to nerve ring, and gradually widening again posteriorly to pear-shaped basal bulb without valves.
• Cardia cylindrical, embedded in intestine.
• Tail elongate-conoid, arcuate ventrad. Three caudal glands present, their nuclei are incaudal. Spinneret functional.

• Didelphic, amphidelphic; ovary branches reflexed antidromously.
• Oviduct a narrow tube. Spermatheca absent.
• Uterus a wide tube composed of large cells.
• Vagina straight, 0.2–0.3 times vulval body diameters long (0.6 in immature female); pars proximalis vaginae encircled by single sphincter muscle. Epiptygmata and advulval sensilla absent. .
  

Male:

• Diorchic; anterior testis outstretched; posterior one reflexed.

• Spicules paired, symmetrical, with straight shaft and arcuate manubrium.

• Gubernaculum absent.

• Single midventral precloacal sensillum present..

Ref: Holovachov (2012)

Reported median body size for this species (Length mm; width micrometers; weight micrograms) - Click:

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Distribution:

Described from marine bottom sediments off the west coast of Sweden.

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Feeding:

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Biology and Ecology :

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Life Cycle:

Ecophysiological Parameters:

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Ecosystem Functions and Services :

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Management:

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References:

Goodey, T. 1947. Domorganus suecicus n.g., n.sp., a new cylindrolaimid free-living soil nematode. Journal of Helminthology, 21, 175–180.

Holovachov, O. 2012. Swedish Plectida (Nematoda). Part 1. Domorganus suecicus sp. n. from Skagerrak. Zootaxa 3263: 63–68.

Tchesunov, A.V. & Sturhan, D. (2004) Studies on Domorganus suecicus Goodey, 1947 (Nematoda: Ochridiidae). Journal of nematode morphology and systematics, 6:139–150.

Copyright © 1999 by Howard Ferris.
Revised: August 11, 2022.