Aquatic macroinvertebrates of Nee Soon 
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Fig. 9. Distribution and abundance of order Plecoptera in the Nee Soon drainage. Solid 
circles indicate sites where representatives were collected and circle sizes are proportionate to 
abundance/numbers of individuals captured as reflected in the accompanying legend. 
Class ARACHNIDA 
The arachnids include not only familiar organisms such as the spiders and the 
scorpions, but also several other groups such as mites and harvestmen. Arachnids are 
easily identified, as they typically possess four pairs of legs as well as a body divided 
into two parts, the cephalothorax and the abdomen. Two taxonomic groups have been 
recorded from the Nee Soon drainage in the course of this study. 
Subclass Acari 
The subclass Acari was recorded from the Nee Soon freshwater swamp forest during 
this study. This subclass is more commonly known as the mites, and is extraordinarily 
