Alloionema

  

Contents

  

Rev 11/19/2024

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

Chromadorea

  Rhabditia

    Rhabditida

Tylenchina

      Strongyloidoidea

        Alloionematidae

       
Alloionema Schneider, 1859
    Synonym

Leptodera Schneider, 1866

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Morphology and Anatomy:

Based on A. luofuensis:

Ref: Huanh et al., 2016

 

 

 

Male:

  • Six pairs of genital papillae and a single mid-ventral papilla precloacal
  • A pair of pore-like phasmids situated between the last two pairs of genital papillae
  • Spicules paired, separated, with a large gubernaculum;
  • No bursa.
  • Tail conoid-shaped with filiform terminus

Female:

  • Didelphic-amphidelphic; 
  • Vulva at mid-body region;
  • Tail elongated-conoid gradually tapered to a filiform terminus.

 

 

Body size range for the species of this genus in the database - Click:
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Distribution:

 

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Feeding:

  Bacterivorous; closely associated with slugs and snails

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Biology and Ecology:

 

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Life Cycle:

The type species, A. appendiculatuim, has an alternation of two different saprophytic generations  distinguished mainly by their size and tail shape (Schneider, 1859).  Mengert (1953) referred to the two forma as Grossform and Kleinform

For Ecophysiological Parameters for this genus, click 
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Ecosystem Functions and Services:

 

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Management:

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References:

 

Holovachov, O., Bostrom, S., De Ley, I.T., McDonnell, R.J., Alvarado, S., Paine, T.D., De Ley, P. 2016. Alloionema similis n. sp., a genetically divergent sibling species of A. appendiculatum Schneider, 1859 (Rhabditida: Alloionematidae) from invasive slugs in California, USA. Syst. Parasitol. 93:877-898.

 

Huanh, R-E., Li, R., Zhao, Z. 2016. Discovery of a free-living nematode phylogenetically related to vertebrate parasites of the genus Strongyloides (Nematoda: Strongyloidoidea): morphological, anatomical and molecular characterisation. Invert. Systematics 30:387-397.

 

Mengert, H. 1953.. Nematoden und Schnecken. Zeitschrift fur Morphologie und Okologie der Tiere, 41:311-349.

 

Nermat, J., Vladimir Puza and Zdenek Mracek.. 2016. Neoalloionema indicum n. sp. (Nematoda: Alloionematidae), a new alloionematid from India. Nematology 16:949-962.

 

Schneider, A.F. 1859. Uber eine Nematodenlarva and gewisse Verschiedenheiten in den Geschlechtsorganen der Nematoden. Zeitschrift fur Wissenschaftlichen Zoologie 10, 176-178.

 

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Copyright 1999 by Howard Ferris.
Revised: November 19, 2024.

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