- ossa praeethmoidea
plural of os praeethmoideum
Dictionary of ichthyology. 2009.
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os praeethmoideum — (plural ossa praeethmoidea)) pre ethmoid (one of the paired deep bones lying above the vomer in Amia and Esox. Similar bones occur in Catostomidae and Cyprinidae. Formerly called septomaxilla but not homologous with that bone in tetrapods) … Dictionary of ichthyology