Oriverutus nusi




Rev 01/29/2020

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Oriverutus nusi Ahmad, 2007


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Morphology and Anatomy:



  • Genital system amphidelphic; both sexual branches almost equally developed.
  •  Ovaries reflexed, measuring 31- 41 µm (anterior) and 42-76 µm (posterior) with oocytes arranged in a single row except near tip.
  • Oviduct joining ovary subterminally, measuring 36-39 µm (anterior) and 36-38 µm (posterior). Sphincter well developed, at oviduct-uterus junction.
  • Uterus a wide tube, measuring 32-36 µm (anterior) and 36-38 µm (posterior).
  •  Vagina extending inwards ca half of corresponding body diam. Pars proximalis vaginae spheroid, 9.0-9.5 µm long and 11-12 µm wide, encircled by circular musculature. Pars refringens vaginae appearing as two drop-shaped sclerotised pieces in lateral view, each measuring 4 × 3 µm, cw 8.5-9.0 µm. Pars distalis vaginae 3.0-3.5 µm with curved walls.
  • Prerectum 2.2-3.7 anal body diam. long.
  • Rectum1.1-1.3 anal body diam. long.

Male: Unknown




Reported median body size for this species (Length mm; width micrometers; weight micrograms) - Click:


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Described from specimens collected from soil around roots of forest trees from Kent Ridge Park, near the National University of Singapore, Singapore

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Biology and Ecology:

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Life Cycle:

Ecophysiological Parameters:

For Ecophysiological Parameters for this species, click If species level data are not available, click for genus level parameters


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Ecosystem Functions and Services:


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Ahmad, W. 2007. New and known species of Dorylaimoidea (Nematoda: Dorylaimida) from Singapore. Nematology 9:215-229.

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Copyright © 1999 by Howard Ferris.
Revised: January 29, 2020.