Diplogasteroides haslacheri

 

Contents

 

Rev: 07/17/2023

  Classification Biology and Ecology
Morphology and Anatomy Life Cycle
Return to Diplogasteroides Menu Economic Importance Ecosystem Functions and Services
Distribution Management
Return to Diplogasteroididae Menu Feeding  References
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Classification:

 
Chromadorea
        Diplogastria
         Diplogastrida
         Diplogastroidea
Diplogasteroididae
       
Diplogasteroides haslacheri
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        Synonyms:
          
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    Morphology and Anatomy:

    General configuration of genus based on the description of a ceyptic population resembling Diplogasteroides haslacheri

     

     

    Females:
    •  Body cylindrical, moderate to slender, tapering anteriorly and posteriorly.
    • Cuticle finely to moderately annulated.
    • Lip region not offset from body contour, weakly separated into six sectors; each with a setiform labial sensilla.
    • Stoma tube-like, with cheilostom, gymnostom, and stegostom sections; cheilostom short, with thickened, ring-like anterior and short tube-like posterior; gymnostom cuticularized, tube-like, almost twice as long as the cheilostom.Stegostom separated into pro-meso-, meta-, and telostegostom subsections, metastegostom bearing three small dorsal teeth.
    • Procorpus muscular; metacorpus with a muscular median bulb; posterior pharynx anisthmus and basal bulb.
    •  Nerve ring surrounding the mid- or slightly posterior part of the isthmus.
    • Excretory pore location variable; around the posterior part of the isthmus or anterior end of the basal bulb.
    • Lateral field very weakly discernible.
    • Didelphic, ovaries reflexed along their entire length, each with a wider spermatheca and uterus; spermatheca long,  sometimes filled with well-developed sperm.
    • Vulva porelike, with protuberant lips in lateral view.
    • Three rectal glands visible at prerectum
    • Phasmid visible, laterally located ca 1.2 to 1.4 anal body diameter posterior to anal opening.
    • Tail elongated, conical, smoothly tapering to a rounded or finely pointed tip.
       

    Males:  

    • Monorchic, testis straight or reflexed;
    • Vas deferens forming a narrow cloacal tube .
    • Spicules paired, separate; manubrium rounded, separated by a weak constriction; shaft-blade complex bent at one-third of its length from the manubrium, posterior part narrowing to a bluntly pointed straight or slightly ventrally curved tip.
    • Gubernaculum ca one-half of the total spicule in length.
    • Tail conical, smoothly tapering and possessing a spike at the tail end.
    • Nine pairs of genital papillae and an additional small papilla on the precloacal lip present.
    •  Phasmids located between the fifth lateral pair and the v5-7 set, ca 12 to 16 μm from
    • Tail spike length less than cloacal body diameter.

    Ref: Mwamamula et al., 2023

     

     

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

     

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    Distribution:

    Members of the genus are commonly associated with bark beetkles with which they have a phoretic relationship.

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    Economic Importance:

     

     

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    Feeding:

    Classified as a bacterial feeder by Yeates et al (1993).

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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:

    Mwamula, A.O., Lee, S.M., Jung, Y.H., Lee, H., Kim, Y.S., Kim, Y.H. and Lee, D.W. 2023. Morphological and molecular characterization of Diplogasteroides sp., a cryptic population of the Haslacheri Group (Diplogastridae), and Parasitorhabditis terebranus (Rhabditidae) from Korea. J. Nematology 55: | DOI: 10.2478/jofnem-2023-0017

    Yeates, G.W., Bongers, T., De Goede, R'G.M., Freckman, D.W., Georgieva, S.S. 1993. Feeding Habits in Soil Nematode Families and Genera--An Outline for Soil Ecologists . J. Nematology 25: 315-331.

     
    Copyright © 1999 by Howard Ferris.
    Revised: July 17, 2023.