Expression of the cyp19a1 gene in the adult brain of Xenopus is neuronal and not sexually dimorphic

•cyp19a1/aromatase gene expression is regionalized in the brain of adult Xenopus.•cyp19a1 transcripts are detected in neurons and not in radial glial cells.•cyp19a1 transcripts distribution pattern is not sexually dimorphic.•cyp19a1 gene expression exhibits a strong evolutionary conservation.