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

Classification:

Type species of the genus: Sphaeroamphis azoricus Ahmad & Sturhan, 2000

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Morphology and Anatomy:

• Body length 1.2-2.4 mm
• Cuticle  finely striated
• Lip region continuous with body contour
• Amphids somewhat rounded-caliciform
• Odontostyle a little longer than lip width
• Esophagus enlargement starting posterior to the middle

Female:

• Didelphic, amphidelphic
• Vulva pore-like

Male:

• Spicules slender
• 3-4 ventromedian supplements

Andrassy (2009) noted that the genus is very similar in both general morphology and habitat to that of Thorneella, the main difference being that the male of Sphaeroamphis has a few supplements. He questioned whether they might be considered the same genus.

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Distribution:

Type species described from brackish waters in the Azores.

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Feeding:

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Biology and Ecology:

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Life Cycle:

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Ecosystem Functions and Services:

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Management:

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References:

Ahmad, W. and Sturhan, D. 2000. Sphaeroamphis gen. n.(Dorylaimida: Qudsianematidae, Thorniinae) from the Azores. Russian J. Nematology 8:127-132.

Andrassy, I. 1987. The superfamily Dorylaimoidea (Nematoda) - a review. Families Thorniidae and Thronenematidae. Acta Zoologica Hungarica 33:277-315.

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

Vinciguerra, M.T. 2006. Dorylaimida Part II: Superfamily Dorylaimoidea.  Pp 392-467 in Eyualem-Abebe, W. Traunspurger and I Andrassy (eds) Freshwater Nematodes: Ecology and Taxonomy. CABI, Cambridge MA.

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: June 06, 2023.