Raphidascaris etelidis

 

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Rev 02/08/2024

  Classification Hosts
Morphology and Anatomy Life Cycle
Return to Raphidascaris Menu Economic Importance Damage
Distribution Management
Return to Raphidascarididae Menu Feeding  References
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Classification

Class:    Chromadorea
SubClass: Spiruria
Order:       Ascaridida
Superfamily: Ascaridoidea
Family:         Raphidascarididae

                          Raphidascaris etelidis Moravec & Justine, 2012

Morphology and Anatomy:

  • Medium-sized, whitish nematodes with transversely striated cuticle.
  • Lips nearly equal in size, broader than long, Dorsal lip with two subdorsal double papillae; each ventrolateral lip with one double subventral papilla,
  • Amphid situated lateral.
  •  Narrow lateral alae extend along whole body length, united anteriorly close to ventrolateral lips on one side of body and form cordons on tail /
  • Esophagus short; posterior half  broad .
  •  Ventriculus transversely oval; ventricular appendix relatively short.
  • Excretory pore posterior to level of nerve ring.
  • Tail of both sexes conical.

Male:

  • Spicules equal, alate, pointed, 2.5% of body length.
  •  60-65 pairs of small subventral papillae present, 44-49 preanals and 12-13 postanals;
  •  Anterior cloacal lip with poorly developed unpaired median papilla.
  • Tail  ending in small appendage provided with many cuticular spines or protuberances

Ref: Moravec and Justine, 2012,

Female:

  • Vulva situated in anterior region of body at 16% of body length;
  • Vagina directed posteriorly from vulva.
  •  Uterus forms coils in region posterior to vagina, extending posteriorly to level of rectum.
  • Eggs numerous,
  • Tail tip with numerous minute cuticular spines

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

 

  
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Distribution:

Described from deepwater fish, longtail red snapper (Etelis coruscans Valenciennes, 1862 (type host)) and crimson jobish (Pristipomoides ilamentosus Valenciennes, 1830 from the external slope of the barrier reef of the southwestern coast of New Caledonia, South Paciic.  Both host fish in the family Lutjanidae, Perciformes.

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Feeding:

Parasites of digestive tract of marine fish.

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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:

Moravec, F. and Justine, J.-L. 2012. Raphidascaris (Ichthyascaris) etelidis n. sp. (Nematoda, Anisakidae), a new ascaridoid nematode from lutjanid ishes off New Caledonia. Zoosystema 34:113-121. DOI: http://dx.doi.org/10.5252/z2012n1a4

 

 

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