Panagrolaimus orientalis

Contents

Rev 04/03/2024

  Classification Biology and Ecology
Morphology and Anatomy Life Cycle
Return to Panagrolaimus menu Ecosystem Functions and Services
Distribution Management
Return to Panagrolaimidae menu Feeding  References
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Classification:

 Chromadorea                   Rhabditida                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
Rhabditia
Panagrolaimidae

Panagrolaiminae

Panagrolaimus orientalis Korenchenko, 1986

Synonyms;
 
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Morphology and Anatomy:

Panagrolaimus orientalis  A, Male. B, Pharyngeal region. C, Female anterior. D, Lateral field.

E, Female gonad. F, Female. G, Male posterior (arrow 50 phasmid). H, Female posterior (arrow to phasmid).

From Seddiqi et al., 2016

Female.

  • Body cylindrical, slightly curved ventrally after fixation.
  • Cuticle finely annulated, 2um thick; lateral fields with three incisures.
  •  Lip region continuous with body contour; six small lips amalgamated in pairs, and small oval amphid openings.
  • Stoma panagrolaimoid, with distinct cheilo-, gymno- and stegostom;
  • Pharynx panagrolaimoid; corpus cylindrical, isthmus slender; basal bulb spheroid, with grinder.
  • Cardia conoid, surrounded by intestinal tissue.
  • Nerve ring at isthmus level; secretory-excretory pore opening at level of basal bulb,
  • Reproductive system monodelphic-prodelphic, located on the right side of intestine;  postuterine sac 1.2-1.4 times the corresponding body diameter long; vagina less than half of the body width;
  • Vulva with protruding lips, posterior to middle of body. Rectum 1.1-1.2 times abd.
  • Tail conical-elongate, with pointed tip. Phasmids at 33-36% of tail length.

Male.

  • Monorchic, with testis reflexed ventrally.
  • Tail conical, distally curved with acute terminus.
  • Three subventral pairs of precloacal genital papillae, two of them within the region of spicules.
  • Five pairs of postcloacal genital papillae: two ventral, one lateral and two subdorsal pairs.
  • Phasmids at 26% of tail length from cloaca.
  • Spicules curved ventrally: manubrium rounded; calamus short, straight; lamina slightly curved ventrally, with dorsal hump and pointed terminus.
  •  Gubernaculum well developed, less than half of the spicule length.

Ref: Seddiqi et al., 2016

 

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

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Distribution:

Clooected in Kerman Province, Iran in rhizosphere of Pinus sp.

 

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Feeding:

Bacterivore.

Typical of genus: moves with constant turning of head from side to side, ingesting bacteria by alternate dilation and closing of esophageal canal and very rapid pumping action and movement of the valves of the terminal bulb of esophagus.

 

 

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Biology and Ecology:

 

 

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Life Cycle:

Ecophysiological Parameters:

For Ecophysiological Parameters for this species, click If species level data are not available, click for genus level parameters
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Ecosystem Functions and Services:

 

 

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Management:

 

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References:

Goodey, J.B. 1963. Soil and Freshwater Nematodes.

Korenchenko E.A. 1986. [Panagrolaimus orientalis sp. n. (Rhabditida, Cephalobina) from the weevil Hylobius albosparsus] (in Russian). Zoologicheskii Zhurnal. 65:793-796.

Seddiqi, E., Shokoohi, E., Divsalar, N., Abolafia, J. 2016. Descriptions of four known species of the families Panagrolaimidae and Alloionematidae (Nematoda: Rhabditida) from Iran. Tropical Zoology 29:87-110. , http://dx.doi.org/10.1080/03946975.2016.1177384

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Copyright © 1999 by Howard Ferris.
Revised: April 03, 2024 .