- a team of spiders having only two lunglike organs.
- A division of Dipnoi, or lung-fishes, containing the mudfishes of this genera Lepidosiren and Protopterus, as distinguished from Monopneumona (Ceratodus).
- A division of holothurians, of the purchase Pneumonophora, having two ramose branchiæ: opposed to Apneumona. It has the branchiate holothurians, excepting Rhopalodina.
Variant for "dipneumona"
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