Trichostrongylus		Contents		Rev 03/24/2025
		Classification		Biology and Ecology
		Morphology and Anatomy		Life Cycle
Return to Trichostrongylus Menu				Ecosystem Functions and Services
		Distribution		Management
Return to Trichostrongylidae Menu		Feeding		References
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Classification

Chromadorea

Chromadoria

Rhabditida

  Rhabditina

   Trichostronglyloidea

    Trichostrongylidae

Amidostomatinae

Quasiamidostomum Lomakin, 1991

Type species of the genus: Quasiamidostomum fulicae (Rudolphi, 1819) Lomakin, 1991

Synonyms:

Spiroptera fulicae Rudolphi, 1819

Amidostomum fulicae (Rudolphi, 1819) Seurat, 1918

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Morphology and Anatomy:

Krolaczyk et al 2020 used discriminat analysis of morphometric characteristics to conclude that Quadramidostomum is separate from the genus Amidostomum.

Characteristics of the genus as represented primarily by Q. fulicae:

• Buccal cavity thick-walled with a large slim dorsal tooth extending from the bottom of the buccal cavity almost to the stomal aperture.

• Body length 6-15 mm

•  

• Male: Bursa with two laterally expanding cuticle lobes supported by one single and six paired hypodermal ribs arranged obliquely towards the posterior end, Ttwo spicules of almost equal length; the proximal parts slightly broadened and at about mid-length branched off to form two arms, Spindle-shaped gubernaculum measuring located between the copulatory setae.

  Female:  Vulva at an average distance of 2.0 mm  (about 20:% of body length) s showed somewhat larger buccal cavities, with depth and width averaging 19.4 Ovijector appeared large, with well-developed musculature, broadened in the mid-part Eggs oval in s smooth, measuring 90.5 � 59 um on average. Tail was long (mean length of 219.0 um), straight, and tapered posteriorly

ref: Krolaczyk et al 2020

Quasiamidostomum fulicae. Left: buccal capsule; Right: Male posterior with bursa, spicules, gubernaculum Drawings from Krolaczyk et al 2020

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Distribution

The type species has been reported from  waterfowl, includoing the common moorhen, the spotted crake and red-headed pochard from across Great Britain, Spain, Italy, Bulgaria, Hungary, Poland, Ukraine, Lithuania, Latvia, and Russia (Krolaczyk et al 2020)

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Economic Importance:

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Hosts:

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Feeding

Intestinal parasite of waterdowl (Gruiformes)

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Life Cycle:

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Damage:

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Management:

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References:

Krolaczyk, K., Zaborski, D., Dzierzba, E. and Kavetska, K.M., 2020.. Redescription of Quasiamidostomum fulicae (Rudolphi, 1819) Lomakin, 1991 (Nematoda: Amidostomatidae), a parasite of Fulica atra (Gruiformes). Journal of Veterinary Research, 64: 95-102.

Lomakin V.V. 1919. Revision of the family Amidostomatidae (Nematoda, Strongylida). Gelminol Zhivotnych 30: 79-85/

Seurat L.G. 1918: Sur un nouveau strongle (Trichostrongylidae) de l��chasse (On a novel strongylid (Trichostrongylidae) found in the stilt � in French). Bull Mus�um Natl d�Histoire Natur 24, 113-115.

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