Genus Amphidelus

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Family Alaimidae

Genus Amphidelus

The Genus Amphidelus was found at KBS/LTER, Michigan by Frekman and Ettema (1993), Birney (unpublished data) and Quintanilla Tornel (2006, 2007 or 2008 sampling).

Genus Amphidelus Thorne, 1939

" Diagnosis. Amphidelinae. Relatively large size. Head rounded, not offset. Lip region low. Amphids pocket-shaped, well developed, apertures large transverse slits, fovea broad, deeper than wide; sometimes elongate-conoid; positioned anterior to two head diameters from anterior end, mostly at one head diameter from anterior end. Pharynx relatively short, gradually expanding in its posterior part. Secretory-excretory pore anteriorly located. Females mostly didephic-amphidelphic with reflexed ovaries (except in A dolichurus and A. pusillus); vagina thick-walled and vulva with open lips. Males monorchic with anteriorly directed testis, spicules short with central piece, 5-5 ventral pre-cloacal papillae. Many species are in mosses." N. Smol and A Coomans 2006

“Definition: Alaimoidea.  Amphid apertures large, transverse slits or crescents.  Amphids broad, deeper than wide; sometimes elongate-conoid.  Oesophagus narrow but expanding to terminal swelling.  Female gonads paired, opposed, reflexed (except in A. dolichurus and A. pusillus).  Spicules short, somewhat sigmoid in A. lemani. Type species: Amphidelus lissus Thorne, 1939” From Goodey, 1963


Smol, N. and A Coomans Order Enoplida. 2006. In: Eyualem Abebe, Traunspurger W., and Andrassy I. (eds) Freshwater Nematodes: Ecology and Taxonomy. CABI Publishing, Cambridge, MA, pp. 225-292

T. Goodey and J.B. Goodey. 1963. Soil and Freshwater Nematodes.  Butler and Tanner Ltd, London, Great Britain

Powers T. and P. Mullin. Plant and Insect Parasitic Nematodes. University of Nebraska Nematology Website. Photo Gallery- Haughton Crater