North American Tadpoles


Drawing showing spiracle on tadpole

The external opening for exit of water from the opercular chamber

Drawing showing dual spiracles Drawing showing medioventral spiracles Drawing showing sinistral spiracles

Dual-paired, lateral or ventrolateral (shown) spiracles

Medioventral-single, medioventral spiracle on chest or near vent (shown)

Sinistral-single, lateral spiracle on left side of body

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