Geomonhystera

  

Contents

  

Rev: 12/24/2021

  Classification Biology and Ecology
Morphology and Anatomy Life Cycle
Return to Geomonhystera Menu Ecosystem Functions and Services
Distribution Management
Return to Monhysteridae Menu Feeding  References
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Classification:

Chromadorea
  Chromadoria
   Monhysterida
Monhysterina
Monhysteroidea
            Monhysteridae
       Geomonhystera Andrassy, 1981
    Synonyms:
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Morphology and Anatomy:

Per Andrassy, 1981 definition of the genus, primarily terrestrial, often in moist soil environments or on moss in moist environments.

 

 Females:
 Cuticle smooth or very finely striated, with scattered somatic setae.
Body 0.5-1.2 mm.
Outer labial (6) and cephalic (4) setae well developed; lengths <60% of head diameter.
Ocelli absent.
Amphid foveae large, circular, 1-2 head widths from anterior.
Stoma funnel shaped, without teeth or denticles.
Defined by Andrássy as a terrestrial genus, so no aquatic forms with ocelli.
Esophagus cylindrical without terminal bulb.
Rectum muscular, usually >1 abd long.
Vulva at 75-85%, very close to anus, usually within 1-3 abd of anus.
Tail elongate conoid but not filiform, ventrally curved, terminating in a short, conoid spinneret.

  
    Ref: Andrassy (2005); Coomans and Eyualem-Abebe (2006).
Males:  
Males rare in some species, spicules slender, ventrally arcuate, 1.5-2 x abd. Gubernaculum simple, without apophysis.
Median pre-cloacal papillae may be present.
Body size range for the species of this genus in the database - Click:
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Distribution:

Commonly found on tree bark associated with mosses and lichens, or in moist soil environments.

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Feeding:

Feed on bacteria and possibly substrate ingestion in which the substrate includes bacteria, protozoa, algae, etc. (Yeates et al., 1993).

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Biology and Ecology:

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Life Cycle:

For Ecophysiological Parameters for this genus, click 
 

Amphimictic or parthenogenetic.

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Ecosystem Functions and Services:

Free-living soil/terrestrial nematodes.

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Management:

 
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References:

 

Andr�ssy, I. 2005.  Free-living Nematodes of Hungary, Vol. I. Hungarian Natural History Museum, Budapest

Cid del Prado-Vera, I., Ferris, H., Subbotin, S.A. 2018. Six new and one known species of Geomonhystera (Nematoda, Monhysteridae) from moss, an epiphytic plant and soil in M�xico and Ecuador. Zootaxa 4471:76-110.

 

Coomans, A. and Eyualem-Abebe 2006.  Order Monhysterida. Pp 574-603 in Eyualem-Abebe, Traunspurger, W., Andrassy, I. (eds) Freshwater nematodes: ecology and taxonomy.

 

Yeates, et al. 1993. Feeding habits of soil nematodes. J. Nematology 25:315-331.

 

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Copyright © 1999 by Howard Ferris.
Revised: December 24, 2021.