Leptonchus granulosus

 

Contents

 

Rev 04/03/2023

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

Enoplea
                     Leptonchus granulosus Cobb, 1920
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Morphology and Anatomy:

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Leptonchus granulosus: anterior region, posterior region and female gonad.

Drawings from Peralta and Pena-Santiago, 1996

Female:

  •  Siender nematodes, small to medium size.

  • Outer layer of the cuticle thin and smooth. Inner layer thicker, with irreguJar outline and detached from the outer layer; radial refractive elements abundant, very conspicuous at the tail.

  • Lateral chord occupying about one-third of the midbody diameter.

  •  Lateral pores coarse, arranged in two rows and located in the borders of the lateral chord.

  • Lip region cap-like, with angular contour, offset from body contour by a marked constriction, twice as wide as high.

  • Lips moderately separated; their inner parts prominent.

  • Cephalic and labial papillae distinct.

  • Arnphid funnel-shaped, aperture at level of the cephalic constriction, aperture two-thirds of the lip region diameter.

  • Stoma a truncate cone with sclerotized walls surrounding oral aperture.

  • Guiding ring simple, slightly refractive.

  • Odontostyle very thin, slightly dorsally curved, slightly shorter than the lip region diameter.

  • Odontophore slightly ventrally arched and surrounded by esophageal tissue.

  • Esophagus sIender and weakly muscular anteriorly and with a part and a cylindrical or pear-shaped basal bulb that occupies about 1/5 of total length of esophagus.

  •  Cardia bilobed and surrounded by intestinal tissue.

  • Prerectum very long, its length about 22-29 x anal body diameter; rectum slightly longer 1 x anal body diameter.

  • Genital system amphidelphic-didelphic. Ovaries reflexed, short, with few oocytes. No sperm in genital system, probably parthenogenetic.

  • Vagina conical or pear-shaped; vulva a transverse slit.

  •  Tail shorter than anal body diameter; rounded-conoid to hemispherical.

  • Two pairs of caudal pores, one subdorsal anteriorly located and the other almost Iateral at the middle of the tail.

Ref:: Peralta and Pena-Santiago (1996).


Males:
 
Not seen.
 

 

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

 

 

   
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Distribution:

Leptonchus granulosus has been reported from Europe, North America, South America, Australia and Africa (Goseco et al , 1974).

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Feeding:

Classified as hyphal feeding (Yeates et al., 1993)

 
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Biology and Ecology:

   
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Life Cycle:

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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:

Goseco,C.G., Ferris, V.R. and Ferris, J.M. 1974. Revisions in Leptonchoidea (Nematoda: Dorylaimida). Leptonchus, Proleptonchus, Funaria, and Meylis n.gen. in Leptonchidae, Leptonchinae. Research Bull. Ag. Exp. Sta, Purdue Univ. 911. 32p.

Peralta, M., Pena-Santiago, R. 1996. Nematodes of the order Dorylaimida from Andalucia Oriental, Spain. The families Leptonchidae Thorne, 1935 and Aulolaimoididae Jairajpuri, 1964.  Fundam. appl. Nematol., 19:481-497.

Yeates, G.W., T. Bongers, R. G. M. De Goede, D. W. Freckman, and S. S. Georgieva. 1993. Feeding habits in soil nematode families and genera—An outline for soil ecologists. Journal of Nematology 25:315-331

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Copyright © 1999 by Howard Ferris.
Revised: April 03, 2023.