Coomansinema istvani		Contents		Rev 08/24/2024
		Classification		Biology and Ecology
		Morphology and Anatomy		Life Cycle
Return to Coomansinema Menu				Ecosystem Functions and Services
		Distribution		Management
Return to Thornenematidae Menu		Feeding		References
		Go to Nemaplex Main Menu		Go to Dictionary of Terminology

Classification:

Synonyms

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Morphology and Anatomy:

Species characterized by:

•  relatively small size (L = 0.95- 1.51 mm),
•  lip region almost continuous with body profile
• partly amalgamated lips,
• odontostyle slightly sinuate, with wide lumen, 20-27 um long (1.4-1.9x lip region diam)
• odontophore linear, slightly longer than odontostyle
• guiding ring simple
• pharyngeal expansion 41-48% of total length
•  pre-rectum very short,
• tail short (c′ = 0.6-1.0)

	Female.  didelphic, amphidelphic, overies reflexed vulva transverse spermatheca present, containig sperm. tail cupola-shaped, with a very short, finger-like, blunt process, dorsally oriented Male. Diorchic 8-9 weakly developed, spaced, ventral pre-cloacal supplements Spicules dorylaimoid tail convex-conoid with blunt terminus, always shorter than cloacal body diam Ref: Vinciguerra et al., 2014
Coomansinema istvani C: female anterior, F: female posterior, D: amphid; G: male posterior. Drawings from Vinciguerra et al., 2014
Reported median body size for this species (Length mm; width micrometers; weight micrograms) - Click:

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Distribution:

Described from forest litter and soil in rainforest is Ecuador

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Feeding:

Categorized as omnivores (Yeates et al., 1993).

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Biology and Ecology:

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Life Cycle:

Probably sexually reproducing; spermatheca present, containing sperm. Males as common as females.

Ecophysiological Parameters:

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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.

Vinciguerra, M.T., Orselli, L. and Clausi, M. 2014. One new and two known species of Aporcelinus Andrássy, 2009 and a new species of Coomansinema Ahmad & Jairajpuri, 1989 (Nematoda: Dorylaimida). Nematology, 16:303-322.

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, 2024.