A genus of ancient amphibian-like creatures from the early Paleozoic that had gill structures, now extinct.
From Greek 'branchia' (gills) plus 'saurus' (lizard). This scientific name describes an extinct creature whose key feature was its gills.
Branchiosaurus fossils show that some creatures were experimenting with both lungs and gills at the same time—nature's awkward phase between water and land living!
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