Longistrongylus		Contents		Rev 02/26/2024
		Classification		Biology and Ecology
		Morphology and Anatomy		Life Cycle
Return to Longistrongylus Menu				Ecosystem Functions and Services
		Distribution		Management
Return to Haemonchidae Menu		Feeding		References
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Classification

Chromadorea

Chromadoria

Rhabditida

  Rhabditina

   Trichostronglyloidea

    Haemonchidae

Ostertagiinae

Longistrongylus Le Roux, 1931

Type species of the genus: Longistrongylus meyeri Le Roux, 1931

Synonyms:

Bigalkenema (Ortlepp, 1963) Gibbons, 1977

Bigalkea (Monnig, 1932) Travassos, 1937

Kobusinema (Ortlepp, 1963), Gibbons, 1977

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Morphology and Anatomy:

The synlophe, a system of longitudinal cuticular ridges characteristic of some Longistrongylus species. Some speciers are characterized by a tapering pattern of ridges in the lateral region of the cervical zone (anterior to the esophageal-intestinal junction). That pattern is fairly consistent among male and female specimens. In contrast, the synlophepattern is parallel in Longistrongylus meyeri the lateral pattern is parallel.

The synlophe pattern  is bilaterally symmetrical, with ridges extending from the base of the cephalic expansion to near the caudal extremity in males and females. Ridges are acutely pointed, with perpendicular orientation.. Species-specific patterns, including the number of ridges augment the array of diagnostic characters for species of Longistrongylus contribute to identification of female specimens (Hoberg et al., 2009)..

The genus Logistrongylus is characterized by:

• Body filiform, with small head vesicle., lengths uo to 20 mm.

• Cervical papillae small, more or less equidistant from anterior end.

• Longitudinal cuticular ridges of synlophe numerous, of approximately equal height and symmetrically arranged. .

• The vulva positioned in the posterior third of the body

• Male: Prebursal papillae prominent. Bursa with well developed symmetrical lateral lobes and reduced dorsal lobe; Anteroventral bursa ray divergent, straight or curved ventrally; dorsal ray stout, short, bifurcates at distal half. Spicules equal, lightly chitinized or membraneous, each with two short, pointed lateral branches; Gubernaculum absent

  Female: Vulva in posterior third of body Tail bluntly pointed; Oviparous. A pair of small rays on the ventral surface of the genital cone,

ref: Gibbons, 1977

..

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Distribution

Many of the species recorded in the Gibbon (1977) revision of the genus were collected from host animals in central and southern Africa.

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Economic Importance:

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Hosts:

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Feeding

Many of the species are parasites of the abomasa and small intestine of ruminants.

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Life Cycle:

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Damage:

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Management:

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References:

Gibbons, L.M. 1977. Revision of the genera Longistrongylus Le Roux 1931, Kobusinema Ortlepp, 1963 and Bigalkenema Ortlepp, 1963 (Nematoda: Trichostrongylidae). J. Helminthology 51:41-62.

Hoberg, E.P., Abrans, A., Pilitt, P.A. 2009.  Synlophe structure for species of Longistrongylus (Nematoda: Trichostrongyloidea), abomasal parasites among ungulates from sub-Saharan Africa, with comparisons to the global ostertagiine fauna . J. Parasitology 95:1468-1478,  doi: 10.1645/GE-2102.1.

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