Marcopoloichthys furreri sp. nov. in lateral view illustrating some cranial bones in paratype PIMIZ A/I 2887. A. Cranium and pectoral girdle and fin in lateral view; photograph was taken by T. Scheyer; B. Skull roof bones illustrating ornamentation; C. Upper jaw bones; ornamentation on bones is damaged. Abbreviations: a.na, accessory or additional nasal bone; a.pl, anterior pit-line; exc, extrascapular; met, mesethmoid; m-pl, middle pit-line; mx, maxilla; na, nasal bone; pa[=fr], parietal [= frontal] bone; pmx, premaxilla; ppa+dpt [= pa + dpt], postparietal + dermopterotic bone; ptt, posttemporal. Scale bars: 1 mm.