Epidermal outgrowth that facilitates breaking of the eggshell in archosaurs and monotremes. [ PHENOSCAPE:alex ]
This is just here as a test because I lose it
Term information
present in taxon
http://purl.obolibrary.org/obo/NCBITaxon_8492
http://purl.obolibrary.org/obo/NCBITaxon_9255