Cobbionema acrocerca

 

Contents

 

Rev: 02/12/2024

  Classification Biology and Ecology
Morphology and Anatomy Life Cycle
Return to Cobbionema Menu Biology and Ecology
Distribution Management
Return to Selachinematidae Menu Feeding  References
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Classification:

Chromadorea
  Chromadoria
Chromadorida
    Selachinematidae
       Cobbionema acrocerca Filipjev, 1922

Type species of the genus:

    Synonyms:
     

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Morphology and Anatomy:

Within the genus Cobbionema, C.  acrocerca is characterized by:

Ref: Ahmed et al., 2020

 

Females:
  • Didelphic, amphidelphic, ovary branches reflexed antidromously.
  • Vagina straight, without cuticularizations, surrounded by single sphincter muscle.
  • Vulva midventral, a transverse slit.
  • Rectum absent.


   

 
Cobbionema acrocerca A-B: female head, detail and surface; C: male head, surface; D: male anterior; E: female amterior gonad; F: female caudal; G: male caudal H: spicule, I: gubernacular crura. Scale ber = 20 um.
Drawings from Ahmed et al., 2020.
 
Males:    
  • Diorchic, with outstretched anterior testis and reflexed posterior testis.
  •  Spicules paired and symmetrical, elongate, consisting of two sections separated by a constriction, nearly straight, with rounded m
  • Gubernaculum reduced  to two sublateral crura, arcuate conoid in shape, flanking distal part of spicules.
  • Precloacal supplements  midventral.

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

 

 
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Distribution:

Predatory marine nematodes. Recorded from bottom sediments between 200 and 500m deep off the coast of Sweden.

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Feeding:

Predatory: intestinal contents observed include  undigested remains (spicules and gubernacula) or partially digested entire bodies of a variety of nematode species, including Chromadoridae.

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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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Biology and Ecology:

Predator,

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Management:

 
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References:

Ahmed, M., Bostrom, S., Holovachov, O. 2020. Revision of the genus Cobbionema Filipjev, 1922 (Nematoda, Chromadorida, Selachinematidae). European Journal of Taxonomy 702; 1-34. :https://doi.org/10.5852/ejt.2020.702

Copyright © 1999 by Howard Ferris.
Revised: February 12, 2024.