Gillless

Some salamanders are both gillless and lungless as adults, relying solely on cutaneous respiration to breathe.

...which closely resembles the golden chanterelle, except that it is white and slightly larger; the gillless chanterelle...

However, in Cloeon evidence from experiments with gilled and gillless nymphs suggests that the primary, perhaps sole, function of gill movement is to reduce...

...borne by four branchial arches, and the fifth arch is gillless...