Maxvachonia

  

Contents

  

Rev: 08/23/2025

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

Chromadorea

Chromadoria

Rhabditida

Spirurina

Cosmocercoidea

                         Cosmocercidae

Maxvachoniinae

                          Maxvachonia Chabaud and Brygoo, 1960

Type species of the genus: Maxvachonia dimorpha Chabaud and Brygoo, 1960

    Synonyms:

Austrocerca Inglis, 1968     

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Morphology and Anatomy:

Ref:  Anderson et al., 1978; Ni, et al., 2022

 

  
 
 

Males:  

  • Spicules slender
  •  Gubernaculum robust, well-sclerotised, with lateral processes, slightly longer than spicules
  •  Caudal papillae numerous pairs
  • Tail long, about 10% of body length

Females:

  • Vulva in region of esophagus
  • Didelphic
  • Eggs with thick or thin shells with nipple or filaments

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

Reported from Madagascar, Australia, Papua New Guinea

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Feeding:

Food Sources and Feeding strategies for the genus Maxvachonia

Intestinal parasites of reptiles, also amphibians

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Biology and Ecology:

Ni et al (2022) reported M. chabaudi from and invasive marine toad (Rhinella marina) in Australia. They speculated that the toad my have acquired the nemayode by feeding on skinks.

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Life Cycle:

The life cycle of Maxvachonia is unknown but, based on studies of  related species, is probabluy direct with infective third-stage larvae either being ingested (by tadpoles) or penetrating the skin (Anderson 1992).

The large list of hosts for the various Maxvachonia spp. also suggests that they have wide host specificity, and thus transfer to a new host would be possible (Ni et al., 2022).

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:

Anderson, R.C. 1992: Nematode Parasites of Vertebrates. Their Development and Transmission. CAB International, Wallingford, 578 pp.

Anderson, R.C., Chabaud, A.G., Willmott, S.  1978. CIH Keys to the Nematode Parasites of Vertebrates. Eds Anderson, R.C., Chabaud, A.G., Willmott, S. CAB

Ni, X-F., Barton, D.P., Chen, H-X., Li, L. 2022. Native species Maxvachonia chabaudi Mawson, 1972 (Nematoda: Cosmocercoidea) found in the invasive marine toad Rhinella marina (Linnaeus) (Anura: Bufonidae) in Australia. Folia Parasitologica 2022, 69: 028 doi: 10.14411/fp.2022.028

Copyright © 1999 by Howard Ferris.
Revised: August 23, 2025.