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Descriptive Features: head distinct, separated from body by a short neck
mouth terminal on head; body flattened, variable in shape, covered by thin cuticle, may be patterned or bear protrusions, bears cilia (sometimes in longitudinal bands)
furca located posteriorly; anus opens above base of furca
Total length: tiny animals, less than 0.5 mm |
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Gastrotrichia |
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Dichaetura sp. |
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Taxonomic Checklist:
Order Chaetonotoidea
Only reported specimens to that date (Williams 1980).
Chaetonotidae: Chaetonotus
Other families expected to occur in Australia (CSIRO 1996).
Dasydytidae
Dichaeturidae
Neogosseidae |
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Distribution: Australia wide
Sensitivity Rating: none
Functional Feeding Group: gathering collector |
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farm dam, Nowra NSW |
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Ecology: Gastrotrichia occur in benthic areas of small still waters including, ponds, bogs, puddles and drainage ditches. They ‘glide’ along substrata using the motion of the bands of cilia and feed on bacteria, algae, protozoans and small particles of organic detritus. All Gastrotrichia are female. They reproduce parthenogenetically. A small clutch of one to five eggs is attached to a submerged object. There are two types of eggs; opsiblastic eggs are resistant to unfavourable conditions; tachyblastic eggs hatch soon after laying into structurally different juveniles. |
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Information Sources: Williams 1980, CSIRO 1996
Key to Families: none |
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