Keywords: FMIB 47018 Head of Mordacia mordax, showing the single nostril, and seven branchial openings.jpeg check categories 2 September 2015 3 Head of Mordacia mordax showing the single nostril and seven branchial openings Subject Petromyzontidae Lampreys Mordacia Tag Fish 1880 Cite book Introduction to the Study of Fishes Gunther Albert C L G Edinburgh Scotland Adam and Charles Black 1880 Fig 2 Creator Albert Günther PD-UWASH-FMIB Institution University of Washington FMIB-source accession number 47018 Images from the Freshwater and Marine Image Bank to check Albert Günther zoologist Mordacia Introduction to the Study of Fishes |