Spinitectus thaiensis




Rev 09/20/2022

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          Spinitectus thaiensis Moravec & Yooyen, 2011


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Morphology and Anatomy:


  • Didelphic, amphidelphic.
  • Vulva not elevated, postequatorial, Vagina muscular, directed anteriorly from vulva.
Anterior of Spinitectus thaiensis showing rows of spines on the cuticle.
From Moravec and Yooyen, 2011


  • Monorchic, testis extending anteriorly to posterior part of glandular eesophagus.
  • Four pairs of subventral, pedunculate precloacal papillae, spaced almost equally; 5 pairs of subventral, pedunculate postcloacal papillae, and 1 pair of ventral sessile papillae.
  • Small phasmids just anterior to ventral postcloacal papillaeLeft spicule larger and longer than right.
Ref: Moravec and Yooyen (2011).

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


Anterior of Spinitectus thaiensis showing esophagus, nerve ring and rows of spines on the cuticle.
From Moravec and Yooyen, 2011
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Spinitectus thaiensis was recovered from the intestine of freshwater fish  (Asian bumblebee catfish Pseudomystus siamensis in northern Thailand (Moravec and Yooyen, 2011).

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Intestinal parasites of freshwater fish.

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Biology and Ecology:


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Life Cycle:

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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Moravec, F. , Yooyen, T. 2011. Observations on two nematode species parasitizing freshwater fishes in Thailand, including Spinitectus thaiensis sp. nov. (Cystidicolidae) from Pseudomystus siamensis (Bagridae). Acta Parasitologica 56:58-66; DOI: 10.2478/s11686-011-0014-1.

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Copyright 1999 by Howard Ferris.
Revised: September 20, 2022.