Skrjabillanus		Contents		Rev: 09/18/2024
		Classification		Biology and Ecology
		Morphology and Anatomy		Life Cycle
Return to Skrjabillanus Menu				Ecosystem Functions and Services
		Distribution		Management
Return to Skrjabillanidae Menu		Feeding		References
		Go to Nemaplex Main Menu		Go to Dictionary of Terminology

Classification:

Chromadorea

  Chromadoria

   Rhabditida

Spirurina

              Dracunculoidea

               Skrjabillanidae

Skrjabillanus Schigin & Schigina, 1958

A genus of parasites of freshwater fish.

    Synonyms:

Agrachanus Tichomirova, 1971

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Morphology and Anatomy:

• Long, thin, thread-like nematodes with smooth cuticle.
• Head end distinctly distended, truncated anteriorly.
• Mouth opening very small, slightly depressed.
• Buccal cavity small
• Base of buccal capsule provided with conical tooth
• Four small cephalic papillae posterior to level of buccal capsule.
• Amphids large, oval, situated approximately at mid-distance between posterior end of buccal capsule and level of cephalic papillae.
• Esophagus muscular throughout, provided with well-developed external esophageal glands.

**Mainly from description of S. cyprini (Molnar and Moravec, 1997)

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Distribution:

Species of this genus have been introduced into Europe with fish imported for breeding and culture (Molnar, 1989).

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Feeding:

Reported as intestional and swim-bladder parasites of grasscarp (Ctenopharyngodon idella) from farmponds in Hungary.

Also, S. cyprini is reported in Hungary from the subsquamal part of the scales of the common carp (Cyprinus carpio) (Molnar and Moravec, 1997).

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Biology and Ecology:

Molnar (1989) repots that Skrjabillanus spp. use the fish louse (Argulus) as an intermediate host. Most parasitized fish are more than two years old but it is uncertain whether fish younger than two years are free from skrjabillanids because they are kept in ponds free from fish louse, or because susceptibility is age dependent.

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Life Cycle:

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Ecosystem Functions and Services:

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Management:

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References:

Molnar, K. 1989. Occurrence of two skrjabillanid nematodes, Sinoichthyonema amuri and Skrjabillanus schigini in grasscarp (Ctenopharyngodon idella) in Hungary. Parasit. Hungarica 22:63-66.

Molnar, K. and Moravec, S. 1997. Skrjabillanus cyprini n. sp. (Nematoda: Dracunculoidea) from the scales of common carp Cyprinus carpio (Pisces) from Hungary . Systematic Parasitol. 38:147-151.

Copyright 1999 by Howard Ferris.
Revised: September 18, 2024.