Comesoma hermani

  

Contents

  

Rev: 04/28/2026

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

Chromadorea
  Chromadoria
   Chromadorida
Comesomatoidea
               Comesomatidae
        Comesomatinae

Comesoma hermani Chen & Vincx, 1998

 

    Synonyms:
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Morphology and Anatomy:

Males:  

  • Body cylindrical, cuticle with transverse rows of very fine dots from head to tail, lateral differentiation of slightly coarser punctuated pattern.

  • Circles of six small labial papillae, and six outer labial sensilla;  four cephalic setae 80% of head diameter.

  • Behind the cephalic setae, arranged in a crown, four subcephalic setae about 46% length of cephalic setae.

  • Buccal cavity anterior portion cup-shaped with conspicuous teeth at the base; posterior portion narrowre with a tooth-like structure at the botto.

  •  Amphid spiral, 2.5 turns and  75% of cbd wide.

  • Somatic setae in a group of 3 or 4 on the ventral side and setae on the dorsal side of cervical region.

  • Cardia small. Nerve ring at 60% of pharyngeal length. Excretory pore at the level of nerve ring. Renette cell behind the cardia.

  • Diorchic with opposed testes.

  • Spicules slender, equal, 4.4 cbd long, 1.0 tail length.

  •  Gubernaculum with ventral and dorsal pieces.

  • Minute preanal papillae or supplements present. Tail 173 µm long, 4.3 cbd long, the posterior third is cylindrical with swollen tip.

  •  Caudal glands three terminal setae presen

Females:

  • General appearance similar to male.
  • Amphidelphic-didelphic, ovaries outstretched.
  • Vulva at  46-50% of the body length.
  • Tail about 5 × abd long

Ref Chen and Vincx, 1998
Comesoma hermani  A: Male pharyngeal region; B: Male anterior;  C: Male total body;  D: Male copulatory apparatus and tail; E: Female head region; F: Female pharyngeal region; G: Female posterior
Drawings from Chen and Vincx, 1998

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

 
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Distribution:

Described from muddy sediments at 220-550 m depth in the Beagle Channel of the Straits of Magellan (southern Chile).

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Feeding:

Probably epistrate feeders

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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:

Chen, G., Vincx, M.  1998. Nematodes from the Strait of Magellan and the Beagle Channel (Chile): description of four new species of the Comesomatida. Hydrobiologia 379:97-110.

 
Copyright 1999 by Howard Ferris.
Revised: April 28, 2026.