Guerrerostrongylus zeta

  

Contents

  

Rev: 04/10/2026

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

Chromadorea
  Chromadoria
  
     Rhabditida
           Rhabditina
             Infraorder Rhabditomorpha
                 Heligmosomoidea
       Helligmonellidae
                    Nippostyrongylinae
       Guerrerostrongylus zeta (Travassos, 1937): Sutton & Durette-Desset, 1991

    Synonyms:

Guerrerostrongylus zeta (Travassos, 1937)

Guerrerostrongylus zetta (Travassos, 1937) Sutton and Durette-Desset, 1991


Longistriata zetta Travassos, 1937
Hassalstrongylus zeta (Travassos, 1937): Durette-Desset, 1971

Guerrerostrongylus uruguayensis Sutton & Durette-Desset, 1991

 

Note: there has been considerable discussion on the spelling of the species name. The name zeta seems to be currently accepted (example Digiani and Serrano, 2024).

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Morphology and Anatomy:

 

 

Females:

  • Synlophe with 35 to 53 ridges;
  • Vestibule as long as infundibulum; uterus ca. 20% of body length;
  • Eggs numerous in uterus
  •  Posterior extremity straight; tail conical, not retractile.
  • Tail length about 1/3 of distance from vulva to posterior extremity

  Ref: Digiani and Serrano, 2024

Males:

  • Synlophe with 37 to 44 ridges
  • Caudal bursa subsymmetrical, elliptical to rectangular, pattern 2-2-1 tending to 1-3-1, dorsal lobe well developed; rays 6 longest, arising at same level as rays 2; rays 8 arising at proximal 1/4 ortelamon V-shaped,
  • Spicules long and thin with undulating or winding pattern.


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

 
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Distribution:

Described from Argentina, Brazil and Uruguay with Oligoryzomys nigripes (black-footed colilargo or black-footed pygmy rice rat) as the major host (Digiani and Serrano, 2024).

 

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Feeding:

Intestinal parasite of the black-footed colilargo or black-footed pygmy rice rat (Oligoryzomys nigripes: Cricetidae)

 

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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:

Digiani, M.C., Serrano, P.C. 2024. Synonymy, redescription, molecular characterisation, and new distribution data of species of Guerrerostrongylus and Guerrerostrongylus (Nematoda, Heligmonellidae) parasitic in sigmodontine rodents from Argentina and Uruguay: a collection-based survey. Zoosyst. Evol. 100 (4) 2024, 1315-1331 | DOI 10.3897/zse.100.125466

Durette-Desset, M-C., Sutton, C.A. 1985.  Contribucion al conocimiento de la fauna parasitológica argentina X, Nematodes (Trichostrongyloidea) en Akodon azarae azarae (Fischer) y Reithrodon auritus Fischer. Revista del Museo de La Plata 14: 21-33.

Sutton, C.A., Durette-Desset, M-C. 1991. Nippostrongylinae (Nematoda:  Trichostrongyloidea) parasites d’Oryzomys flavescens en Argentine et en Uruguay. Revue Suisse de Zoologie 98: 535-553. https://doi.org/10.5962/bhl.part.82072

Travassos, L. 1937.  Revisão da família Trichostrongylidae Leiper, 1912. Monographias do Instituto Oswaldo Cruz, Rio de Janeiro, 512 pp.

 

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