Rev: 11/22/2022

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Subfamily: Tricominaenae
       Tricoma Cobb, 1894

Type species of the genus: T. cincta Cobb, 1894


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Morphology and Anatomy:


Tricoma sp.: Somatic setae
(from Cesaroni et al., 2017)
Tricoma sp. head regions.
Scanning electron micrographs by Shirayama and Hope, 1992.


  • Cuticle conspicuously annulated nwith raised rings covered with desmen (rings of sedimentary material cemented together by desmos).
  • Lip region simple, comprised of three concentric rings surrounding the stoma. (Unlike Desmoscolex in which the lip region is complex).
  • Ocelli may be present as yellow to brown pigment concentrations along the esophagus and/or the anterior part of the intestine.

 Ref: Shirayama and Hope, 1992

Body size range for the species of this genus in the database - Click:
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Marine nematodes, reported from coral reefs; all taxa are marine.

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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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Cesaroni, L. Guidi, L., Balsamo, M., Semprucci, F. 2017. Scanning electron microscopy in the taxonomical study of free-living marine nematodes. Microscopie 28:6970

Decraemer, W. 1978. Morphological and taxonomic study of the genus Tricoma Cobb (Nematoda : Desmoscolecida), with the description of new species from the Great Barrier Reef of Australia. Australian Journal of Zoology Supplementary Series 26(55) 1-121.

Shirayama, Y. and Hope. W.D. 1992. Cephalic tubercles: a new character useful for the taxonomy of Desmoscolecida (Nematoda). Trans. Am. Microscop. Assoc: 111:211-222..

Copyright © 1999 by Howard Ferris.
Revised: November 22, 2022.