Fig. 2: Digital reconstruction of the skull of IVPP V12707.
From: Cretaceous bird with dinosaur skull sheds light on avian cranial evolution
a, b Skull and cranial cervicals. c Left lacrimal (arrowhead denotes the foramen). d Right jugal and quadratojugal (arrowhead denotes the corneal process). e Right squamosal. f Left quadrate (arrowhead denotes a fossa). g, h Facial reconstructions of IVPP V12707 (g), and Dromaeosaurus (h; modified from23). c–e lateral view. f rostrolateral view. an angular, at atlas, atf antorbital fenestra, ax axis, bs basisphenoid-parasphenoid, ce cervical vertebra, co coronoid process, cr caudal ramus, de dentary, eb ethmoid bone, ec ectopterygoid, en external naris, fr frontal, hy hyoid, if infratemporal fenestra, is interorbital septum, jq jugal process, ju jugal, la lacrimal, lc lateral condyle, mf mandible fenestra, mx maxilla, na nasal, obp orbital process, oc occipital region, or orbit, otp otic process, pa palatine, pap paroccipital process, pm premaxilla, po postorbital, pop postorbital process, poz postzygapophysis, pp postorbital process, pr parietal, prp parietal processes, prz prezygapophysis, pt pterygoid, qf quadrate fenestra, qj quadratojugal, qjc quadratojugal cotyla, qjj quadratojugal process of jugal, qjs quadratojugal process of squamosal, rr rostral ramus, sa surangular, sf supratemporal fenestra, sp splenial, sq squamosal, sqp squamosal process, vr ventral ramus, vo vomer, l/r left/right side. Scale bars, 5 mm (a, b, g), 1 mm (c–f), 50 mm (h).
