Rev 07/21/2020

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Morphology and Anatomy Life Cycle
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      Chiloplacus Thorne, 1937

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Morphology and Anatomy:


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

Abolafia and Pena-Santiago (2018) examined the morphology of the lip regiopn of several Chiloplacus species:

  •  Most species with six flattened or conical lips grouped in three pairs, but occasionally fused, with smooth or dentate margins.

  • Primary axils (the clefts between lips that align with the separations between the labial probolae) are generally U-shaped with a smooth to slightly dentate margin and lacking guard processes (small projections at the base of the clerft)

  • Secondary axils (the clefts between lips that align with the labial probolae) are usually V-shaped with smooth margins and without guard processes

  • Labial probolae with a short but robust peduncle and with short or long prongs


  • monodelphic-prodelphic with short post-uterine sac


  • monorchic

  • without bursa


Ref: Abolafia and Pena-Santiago, 2017, 2018

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Representative species occur throughout the world.

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 Bacteria. Observed to establish a colony on Esterichia coli (Wood, 1973).    

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Biology and Ecology:

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Life Cycle:

For Ecophysiological Parameters for this genus, click 
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Ecosystem Functions and Services:


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Abolafia, J.  and R. Pena-Santiago. 2017. On the identity of Chiloplacus magnus Rashid & Heyns, 1990 and C. insularis Orselli & Vinciguerra, 2002 (Rhabditida: Cephalobidae), two confusable species. Nematology 19:1017-1034.

Abolafia, J.  and R. Pena-Santiago. 2018. On the identity of Chiloplacus subtenuis Rashid & Heyns, 1990 (Rhabditida: Cephalobidae) with description of C. mysteriosus sp.n.. Nematology 20:49-66.

Wood, F.H. 1973. Nematode feeding relationships: Feeding relationships of soil-dwelling nematodes. Soil Riol. Biochem. 5: 593-601.

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Copyright © 1999 by Howard Ferris.
Revised: July 21, 2020.