Eudorylaimus		Contents		Rev 08/24/2020
		Classification		Biology and Ecology
		Morphology and Anatomy		Life Cycle
Return to Eudorylaimus Menu				Ecosystem Functions and Services
		Distribution		Management
Return to Qudsianematidae Menu		Feeding		References
		Go to Nemaplex Main Menu		Go to Dictionary of Terminology

Classification:

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Morphology and Anatomy:

• Body length ranging from 0.8-3.5 mm.
• Cuticle smooth or finely striated.
• Head somewhat offset from body contour; lips separate, angular.
• Odontostyle simple, as long or slightly longer than labial diameter.
• Esophagus enlargement starts at about 50% of esophageal length.
• Female genital system diovarial, amphidelphic; vulva usually transverse with sclerotized lips.
• Males common; spicules dorylaimoid; 3-22 ventromedian supplements, spaced apart.
• Tail conoid, straight or ventrally arcuate; <3x anal body diameter.
• Very similar to Allodorylaimus except that there is a space between cloacal papillae and start of supplements and that spermatazoa are spindle-shaped rather than spheroid.

Ref. Andrássy, 2009.

.	Female:   Lip region offset from body contour, short odontostyle and odontophore, no constriction between the two parts of the esophagus; no cardia between esophagus and intestine. Diovarial, amphidelphic, ovaries reflexed. Tail short, conoid or bluntly rounded (?).
Males:
Body size range for the species of this genus in the database - Click:

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Distribution:

Eudorylaimus glacialis from the Dry Valleys of Antarctica

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Feeding:

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Biology and Ecology:

 In a study of the nematode faunae of Florida, USA, McSorley (2012) noted that Eudorylaimus (Qudsianematidae), Aporcelaimellus (Aporcelaimidae)  and Mesodorylaimus (Dorylaimidae) are dominant members of the omnivorous nematode fauna.  They are also reported as dominant in nematode faunae of Europe. The three genera are often found together and multiple species within the genera may be present in slngle soil samples.  In the study, these omnivore nematodes were present in ecosystems that were in nearly all stages of succession but they often reached their greatest numbers in the later stages of succession, such as in soils of old-growth forests. They also showed remarkable adaptation to extreme environments, including Antarctic habitats, dune sands and temperate sites without vegetation. They are reported from a variety of soil types but are limited by soil pH below 4.0. Compared to other nematode taxa, and consistent with their designation of cp 4 and 5 in the Bongers (1990) colonizer-persister system,.they are among the genera most sensitive to moisture levels in sandy soils and to pollution by heavy metals. Some reports also indicate adverse impacts from inorganic fertilisers and other agrichemicals in cultivetd systems.

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Life Cycle:

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Ecosystem Functions and Services:

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Management:

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References:

Andrassy, I. 2009. Free-living Nematodes of Hungary III.  Hungarian Natural History Museum, Budapest. 608p.

Bongers, T. (1990) The maturity index: an ecological measure of environmental disturbance based on nematode species composition. Oecologia 83, 14-19.

McSorley, R. 2012. Ecology of the dorylaimid omnivore genera Aporcelaimellus, Eudorylaimus and Mesodorylaimus. Nematology 14:645-663.

Pena-Santiago, R. and Alvarez-Ortega. 2014. An integrative approach to assess the phylogeny and the systematics of rounded-tailed genera of the subfamily Qudsianematinae (Nematoda, Dorylaimida). Zoologica Scripta 43:418-428.

Wood, F.H. 1973. Nematode feeding relationships: Feeding relationships of soil-dwelling nematodes. Soil Riol. Biochem. 5: 593-601.

Yeates, G.W., T. Bongers, R. G. M. De Goede, D. W. Freckman, and S. S. Georgieva. 1993. Feeding habits in soil nematode families and genera—An outline for soil ecologists. Journal of Nematology 25:315-331.

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Copyright © 1999 by Howard Ferris.
Revised: August 24, 2020.