[Fix] UBERON:0003351 'pharyngeal epithelium' is chordate-restricted but generically labelled

Uberon term
UBERON:0003351

Bug description

UBERON:0003351 has the equivalence axiom epithelium and part_of some UBERON:0001042 (chordate
pharynx), but its label, its definition ("An epithelium that is part of a pharynx") and its
exact synonyms "epithelium of pharynx" and "pharynx epithelium" all read as generic. A curator
matching tissue names against labels will annotate non-chordate pharyngeal epithelium with a
class that asserts the tissue is part of a chordate pharynx. I nearly did that for a sea
cucumber sample and caught it only by reading the axioms.

• Either rename to "chordate pharyngeal epithelium" and demote the generic strings to narrow or related synonyms, or add a taxon-neutral class (epithelium part_of UBERON:0006562 pharynx) with UBERON:0003351 as its child.
• Related: UBERON:0006562 pharynx carries scheduled_for_obsoletion_on_or_after "2023-04-20". Is that still planned, what should curators use for a non-chordate pharynx, and is UBERON:0006562 safe to annotate with meanwhile?

ORCID: https://orcid.org/0000-0001-5025-5886. Filing on behalf of Lattice, Klein Lab, Department of Biomedical Data Science, Stanford School of Medicine.

Start by reviewing the equivalence axiom, label, definition, synonyms, and the status of UBERON:0006562 described in the issue. Done means the taxonomic scope is made explicit or a taxon-neutral class is established, and the issue's question about obsoletion and safe curator use has a documented decision.