FIG. 9 in Craniodental Morphology And Phylogeny Of Marsupials

FIG. 9. Ventral view of left ear region of Marmosa murina (A, AMNH 267368), Phascogale tapoatafa (B, AMNH 160267), and Petaurus breviceps (C, AMNH 154468; note that the pterygoid bone, which when intact extends posteriorly as far as the carotid canal in P. breviceps [char. 47], is missing in this specimen). Alternative states for characters 23, 55, 60, 68, 79, 84, and 87 (see main text for descriptions of these characters and character states) are illustrated as follows: Marmosa 23(1), 55(1), 60(0), 68(0), 79(0), 84(0), 87(0); Phascogale 23(1), 55(2), 60(0), 68(2), 79(3), 84(1), 87(0); Petaurus 23(0), 55(3), 60(2), 68(1[not visible on intact skulls]), 79(4), 84(1[not visible on intact skulls]), 87(1; not visible on intact skulls). Abbreviations: als, alisphenoid; atp, alisphenoid tympanic process; bo, basioccipital; bs, basisphenoid; cc, carotid canal; cf, condyloid foramen; ctp, caudal tympanic process (of pars canalicularis of petrosal); ect, ectotympanic; fgpn, foramen for greater petrosal nerve; fips, foramen for inferior petrosal sinus; gf, glenoid fossa; gpa, glenoid process of alisphenoid; hf, hypoglossal foramen; jf, jugular foramen; jug, jugal; mas, mastoid exposure of pars canalicularis of petrosal); mf, mastoid fenestra; oc, occipital condyle; pes, posterior epitympanic sinus (of squamosal); pfo, primary foramen ovale; pgf, postglenoid foramen; pogp, postglenoid process (of squamosal); pp, paroccipital process (of exoccipital); pro, promontorium (of pars cochlearis of petrosal); pt, pterygoid; ptps, postympanic process (of squamosal); rtp, rostral tympanic process (of pars cochlearis of petrosal); smf, stylomastoid foramen; smn, stylomastoid notch; sq, squamosal; ssf, subsquamosal foramen; tcf, transverse canal foramen. Specimens are not drawn to the same scale.