buccopharyngeal membrane

synonym: oropharyngeal membrane
https://doi.org/10.1351/goldbook.10476

Membrane present in fetal life that separates the nasal cavities from the pharynx.

Source:
PAC, 2016, 88, 713. 'Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)' on page 731 (https://doi.org/10.1515/pac-2015-1202)