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Which ostariophysan order is included in the series Anotophysi?
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ostariophysan
Knifefish, or featherback (Xenomystus nigri)
The series Anotophysi includes only the order Gonorynchiformes, which consists of fishes such as the milkfish and beaked sandfishes.1
Unlike the members of the series Otophysi, fishes in the order Gonorynchiformes do not possess a true Weberian apparatus, which is a specialized bony connection between the swim bladder and the inner ear used to enhance sound perception.1