Eubostrichus hopperi

 

Contents

 

Rev: 01/18/2022

  Classification Biology and Ecology
Morphology and Anatomy Life Cycle
Return to Eubostrichus Menu Ecosystem Functions and Services
Distribution Management
Return to Desmodoridae Menu Feeding  References
    Go to Nemaplex Main Menu   Go to Dictionary of Terminology

Classification:

Chromadorea
  Chromadoria
   Desmodorida
Desmodorina
             Deamodoroidea
                Desmodoridae
     Stilbonematinae
       Eubostrichus hopperi (Hopper & Cefalu, 1973) Muthumbi, Verschelde & Vincx, 1995
    Synonyms:
      
Back to Top

Morphology and Anatomy:

 

 

   

  • Body slender, finely striated, often coated with layer of mucus and dense growth of crescent-shaped bacteria.

  • Head rounded with six inner and outer labial papilliform sensilla and four cephalic setae and various subcepahlic setae.

  • Two to three subventral pairs of enlarged setae at the level of posterior pharynx; on the rest of the body, somatic setae considerably shorter or replaced by porids.

  • Amphid fovea spiral, difficult to observe in most of the specimens because of mucus and bacteria on cuticle.

  • Pharynx muscular without anterior widening, terminal bulb almost round, cardia small, rounded.

  • Tail conical-tapered, tip rounded with two separate outlets of caudal glands; 

Females:

  • Didelphic, ovaries antidromously reflexed, both genital branches to the left of intestine.

  • Two to three caudal pairs of setae in females and juveniles.


 

Males:  
  • Monorchic, anterior testis to the left of the intestine.

  •  Spicules paired and curved, capitulum present;

  • Gubernaculum a narrow rod with distal end curved hook-like,

  • No supplements.

  • Four subventral pairs of enlarged setae in caudal region

 

Ref: Armenteros et al., 2014


 

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

 

Back to Top

Distribution:

Marine nematodes in tidal sands and coral reefs.

 
Back to Top

Feeding:

Nematodes in the subfamily Stilbonematinae of the Desmodoridae are associated with, and feed on,  dense coatings of sulfur-oxidizing chemoautotrophic gammaproteobacteria with which they are apparently obligately symbiotic. The nematodes inhabit environments with low oxygen availability and reducing conditions.Essentially, the nematodes ‘farm’ their bacterial associates by migrating to ocean sediments rich in hydrogen sulfide (Bulgheresi Reference Bulgheresi2011; Murfin et al. Reference Murfin, Dillman, Foster, Bulgheresi, Slatko, Sternberg and Goodrich-Blair2012; Blaxter and Koutsovoulos, 2015).

 

 

Back to Top

Biology and Ecology:

 

Back to Top

Life Cycle:

 

Ecophysiological Parameters:

For Ecophysiological Parameters for this species, click If species level data are not available, click for genus level parameters

Back to Top

Ecosystem Functions and Services:

 

Back to Top

Management:

 
Back to Top

References:

Armenteros, M., Ruiz-Abierno, A., Decraemer, W. 2014. Taxonomy of Stilbonematinae (Nematoda: Desmodoridae): description of two new and three known species and phylogenetic relationships within the family. Zool; J. of the Linnean Soc. 171-1-21.

Blaxter, M. and Koutsovoulos, G. 2015. The evolution of parasitism in Nematoda. Parasitology 142: S26–S39.

Bulgheresi, S. (2011). Calling the roll on Laxus oneistus immune defense molecules. Symbiosis 55, 127–135.

Murfin, K. E., Dillman, A. R., Foster, J. M., Bulgheresi, S., Slatko, B. E., Sternberg, P. W. and Goodrich-Blair, H. (2012). Nematode-bacterium symbioses – cooperation and conflict revealed in the “omics” age. Biological Bulletin 223, 85–102.

 

Back to Top

Copyright 1999 by Howard Ferris.
Revised: January 18, 2022.