Head and anterior part of thorax are indistinct, three posterior tergites could be recognized, but those are shorter and apparently much less sclerotized than abdominal ones.

Although very indistinct, long and slender thoracic appendages are confirmed, some reaching around half length of thorax.

The abdomen has six segments, with the five anterior ones of almost equal length, with ventral tip of tergites bluntly pointed.

[4] Koonaspides and Anaspidites possibly show that this group lived in southeastern Australia for at least 200 million years.

[1] Koonaspides is known from Aptian Koonwarra Fossil Beds in Victoria, which represents a freshwater lacustrine environment in the polar regions of Gondwana.