Pristionchus uniformis

  

Contents

  

Rev: 12/17/2024

  Classification Biology and Ecology
Morphology and Anatomy Life Cycle
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Distribution Management
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Classification:

Chromadorea
Chromadoria
Rhabditina
            Diplogastroidea
Diplogastridae
(formerly Neodiplogastridae
             Mononchoidinae)
        Pristionchus uniformis Fedorko & tanuszek, 1971
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        Synonyms:

    In a 3-year study in Poland, Fedorko and Stanuszek (1971), often found a gonochoristic Pristionchus species on Colorado potato beetles and cockchafers and named it Pristionchus uniformis.

    Extensive research on this and other Pristionchus spp. conducted in the laboratory of  Ralf Sommer, Max Planck Institute for Developmental Biology, Tubingen, Germany.
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    Morphology and Anatomy:

    Females: Diovarial, amphidelphic
    Males:   Showing testis, spicules and gubernaculum


     
     
    Older female with eggs hatching in uteri

      
     


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

     
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    Distribution:

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    Economic Importance:

     

     

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    Feeding:

    Herrman et al. (2006) could not find evidence of  a parasitic relationship between any Pristionchus species and beetles. Thus, the genus Pristionchus is not actively involved in killing the beetles. Rather, the nematodes feed on the carcass of the dead beetle, a phenomenon that has been called necromeny.� In contrast to these observations, observations, Fedorko and Stanuszek (1971) described Pristionchus uniformis as a facultative parasite of  beetles because in some cases the nematodes had invaded the insects  body cavity.

    The nematodes feed on bacteria but also are predators of other nematodes

     

    Pristionchus spp.feed on bacteria but also are predators of other nematodes.
      Pristionchus uniformis with the remains of a nematode carcass.

    Pristionchus uniformis is a gonochoristic nematode that has been found on the Colorado potato beetles (Leptinotarsa decemlineata) at several locations. It has also been found on cockchafers.  In a 3-year study in Poland, Fedorko and Stanuszek (1971), often found a gonochoristic Pristionchus species on Colorado potato beetles and cockchafers and named it Pristionchus uniformis.

     

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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:

    Fedorko, A. and Stanuszek, S. 1971. Pristionchus uniformis sp. n. (Nematoda, Rhabditida, Diplogastridae) a facultative parasite of Leptinotarsa decemlineata Say and Melolontha melolontha L. in Poland. Morphology and biology, Acta Parasitol. Pol. 19:95—112.

    Herrmann, M., Mayer, W.E. and Sommer, R.J. 2006. Nematodes of the genus Pristionchus are closely associated with scarab beetles and the Colorado potato beetle in Western Europe. Zoology 109:96-108

    Sommer, R. 2008. Genetic and transgenic approaches in the nematode model Pristionchus pacificus.
    Fifth International Congress of Nematology, Brisbane, Australia, July 2008.     
     
    Copyright © 1999 by Howard Ferris.
    Revised: December 17, 2024.