Heynsnema		Contents		Rev 06/26/2023
		Classification		Biology and Ecology
		Morphology and Anatomy		Life Cycle
Return to Heynsnema Menu				Ecosystem Functions and Services
		Distribution		Management
Return to Tylencholaimidae Menu		Feeding		References
		Go to Nemaplex Main Menu		Go to Dictionary of Terminology

Classification:

 Back to Top

Morphology and Anatomy:

The species were originally listed by Heyns and collegaues in the genu Thonus. Heysnema was erected to accommodate species of Thonus with a unique combination of characters:: cuticle dorylaimoid, lip region cap-like, pharyngeal expansion occupying about 60% of total neck length, female genital system amphidelphic, pars refringens vaginae lacking or very reduced, tail rounded conoid and similar in both sexes, and 7-10 contiguous ventromedian supplements  Heynsnema resembles several qudsianematid and tylencholaimid genera; it is provisionally classified under the family Tylencholaimidae by Pena-Santiago et al (2008)..

• Cuticle dorylaimoid,
• Lip region cap-like,
• Pharyngeal expansion occupying about 60% of total neck length
• Tail rounded conoid and similar in both sexes

Male:

• 7-10 contiguous ventromedian supplements 

Ref: Pena-Santiago et al (2008)

Back to Top

Distribution:

Back to Top

Feeding:

Nematodes in the Tylencholaimidae often considered fungal feeders (Yeates et al., 1993)

Back to Top

Biology and Ecology:

Back to Top

Life Cycle:

Back to Top

Ecosystem Functions and Services:

Back to Top

Management:

Back to Top

References:

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

Pena-Santiago, R.,  Guerrero and Ciobanu, 2008. A proposal of Heynsnema gen. n. (Dorylaimida: Tylencholaimidae), a remarkable dorylaim from South Africa. J. Nem. Morph. and Syst. 11:47-

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

Back to Top

Copyright © 1999 by Howard Ferris.
Revised: June 26, 2023.