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4,028 results for “Mammalia”
Fig. 48 in The Osteology Of Rhombomylus (Mammalia, Glires): Implications For Phylogeny And Evolution Of Glires
Fig. 48. Cross sections through the glenoid fossa and epitympanic recess of the ear region of Rhombomylus (IVPP V5267). ect, ectotympanic; epr, epitympanic recess; gf, glenoid fossa; hma, head of malleus; pgf, postglenoid foramen; ptm, petromastoid; and sq, squamosal.
Fig. 47 in The Osteology Of Rhombomylus (Mammalia, Glires): Implications For Phylogeny And Evolution Of Glires
Fig. 47. Cross sections through the auditory region of Rhombomylus (IVPP V5267) (only the right side sections are illustrated), showing some inner and middle ear structures and related architectures; these sections are in a continuous sequence. asc, anterior semicircular canal; ata, anterior ampulla; bc, braincase; boc, basioccipital; bps, bulla (ectotympanic)petrosal suture; bs, basisphenoid; ccn, canal for cochlear nerve cfn, canal for facial nerve; coc, cochlear canal; dms, dorsal exposure of mastoid of petrosal; eam, external acoustic meatus; ect, ectotympanic; ectb, ectotympanic bulla; epr, epitympanic recess; ews, epitympanic wing of the sphenoid; fc, fenestra cochleae (rotunda); fr, frontal; hF, hiatus Fallopii; hma, head of malleus; lsa, lateral semicircular canal; lta, lateral ampulla; mal, malleus; md,
Fig. 45 in The Osteology Of Rhombomylus (Mammalia, Glires): Implications For Phylogeny And Evolution Of Glires
Fig. 45. Cross sections anteroposteriorly through the braincase and basicanium of Rhombomylus (IVPP V5266), showing some basic structures and terminology. at, atlas; boc, basioccipital; bs, basisphenoid; coc, cochlear canal; dms, dorsal exposure of mastoid of petrosal; eam, external acoustic meatus; fr, frontal; mal, malleus; ms, mastoid of petrosal; msc, mastoid cavity of petrosal; occ, occipital condyle; pa, parietal; prm, promontorium; saf, subarcuate fossa; smc, septum (septa) in mastoid cavity; soc, supraoccipital; sq, squamosal; tmc, tympanic cavity; and tmr, tympanic ridge (or ring) that holds the tympanium in life.
Fig. 41 in The Osteology Of Rhombomylus (Mammalia, Glires): Implications For Phylogeny And Evolution Of Glires
Fig. 41. Cross sections through anterior and posterior nasal cavity (IVPP V7488) of Rhombomylus, showing internal structures of the cavity. dll, dorsolateral lamina of the Jacobson's fossa; ec1, ectoturbinal 1; ec2, ectoturbinal 2; ec3, ectoturbinal 3; enI, endoturbinal I; enII, endoturbinal II; enIII, endoturbinal III; enIV, endoturbinal IV; fr, frontal; if, incisive foramen; jf, Jacobson's fossa. mx, maxilla; na, nasal; pm, premaxilla; pmx, palatine process of maxilla; ppm, palatine process of premaxilla; tl, transverse lamina; and vo, vomer. See text for discussion.
Fig. 39 in The Osteology Of Rhombomylus (Mammalia, Glires): Implications For Phylogeny And Evolution Of Glires
Fig. 39. Stereoscopic view of internal side of ear region and braincase of Rhombomylus (IVPP V5263).
Fig. 29 in The Osteology Of Rhombomylus (Mammalia, Glires): Implications For Phylogeny And Evolution Of Glires
Fig. 29. Dorsal views of anterior skulls of Rhombomylus (IVPP V5288, V5275), showing the sutures between the nasal, premaxilla, and frontal.
Fig. 24 in The Osteology Of Rhombomylus (Mammalia, Glires): Implications For Phylogeny And Evolution Of Glires
Fig. 24. Ventral view of the skull of Rhombomylus. Reconstruction is based mainly on an adult skull (IVPP V5278).
Fig. 22. A, Left m1 in The Osteology Of Rhombomylus (Mammalia, Glires): Implications For Phylogeny And Evolution Of Glires
Fig. 22. A, Left m1 and the trigonid of m2 from a fragmentary mandible of Rhombomylus (IVPP V7493). The scanning electronic microscopic images (B–F) are closeup views of the areas labeled in A. All the figures are oriented in the same direction but are not on the same scale. Arrows indicate directions of strikes or movement of the teeth.
Fig. 21. A–B, Right M2 and M1 in The Osteology Of Rhombomylus (Mammalia, Glires): Implications For Phylogeny And Evolution Of Glires
Fig. 21. A–B, Right M2 and M1 of Rhombomylus (IVPP V7492, from the same specimen that has been cut to view the longitudinal and frontal sections of the nasal cavity in figs. 43 and 44). The scanning electronic microscopic images (C–G) are closeup views of the areas labeled in A and B. All the figures are oriented in the same direction but are not on the same scale. Arrows indicate directions of strikes or movement of the lower teeth. p, pit; s, striation. See text for description and discussion.
Fig. 16 in The Osteology Of Rhombomylus (Mammalia, Glires): Implications For Phylogeny And Evolution Of Glires
Fig. 16. Enamel structures of the left upper incisor of Rhombomylus (IVPP V7492; the rostrum of the same specimen was cut for the longitudinal and frontal sections of nasal cavity [figs. 43–44]) (the image in G was photographically reversed). A, C, E, Crosssectional views of the incisor enamel microstructure at segments of the same tooth shown in G; B, D, F, longitudinalsectional views of the incisor enamel microstructure near a, c and e in G; H, enamel distribution on the upper incisor. The scanning electronic microscopic images (A–F) are on the same scale. See text for description and discussion.
Fig. 15. Upper, A in The Osteology Of Rhombomylus (Mammalia, Glires): Implications For Phylogeny And Evolution Of Glires
Fig. 15. Upper, A fragmentary mandible showing replacement of lower premolars of Rhombomylus (IVPP V7588); Lower, crosssection of m1 and m2 of Rhombomylus showing the roots and pulp cavity.
Fig. 37 in The Osteology Of Rhombomylus (Mammalia, Glires): Implications For Phylogeny And Evolution Of Glires
Fig. 37. Stereoscopic view of the lateral aspect of the ear region of Rhombomylus (IVPP V5263). The bulla was broken.
Fig. 42 in The Osteology Of Rhombomylus (Mammalia, Glires): Implications For Phylogeny And Evolution Of Glires
Fig. 42. Cross (coronal) sections through the rostrum of Rhombomylus (IVPP V7488), showing internal structures of the nasal cavity. The sequence of sections is indicated in the figure at the lower right corner (the specimen is not the one that was cut). Among a total of 38 sections, only 25 are illustrated. The number between brackets indicates the original position in the cutting sequence. et, ethmoturbinals; fol, fossa for olfactory lobe; fpv, footplate of vomer; mns, median nasal septum; and tl, transverse lamina. See text for discussion.
Fig. 46 in The Osteology Of Rhombomylus (Mammalia, Glires): Implications For Phylogeny And Evolution Of Glires
Fig. 46. Cross sections of the braincase and basicranium of Rhombomylus (IVPP V5266). The cutting sequence of the sections is shown in the figure at the lower right corner. Twentyfour sections out of 33 slides are illustrated. at, atlas; boc, basioccipital; bs, basisphenoid; coc, cochlear canal; da, dens of axis; ms, mastoid of petrosal; occ, occipital condyle; pa, parietal; saf, subarcuate fossa; and sq, squamosal.
Fig. 8 in The Osteology Of Rhombomylus (Mammalia, Glires): Implications For Phylogeny And Evolution Of Glires
Fig. 8. Premolars of Rhombomylus. A–C, Occlusal, lingual, and labial views of the left upper P3 and P4 (IVPP V7534); D–F, occlusal, lingual, and labial views of the right lower p3 and p4 (IVPP V7587.1).
Fig. 36 in The Osteology Of Rhombomylus (Mammalia, Glires): Implications For Phylogeny And Evolution Of Glires
Fig. 36. Stereoscopic view of ventral basicranial and middle ear regions of Rhombomylus (IVPP V7586). The ectotympanic bulla was broken.
Fig. 7 in The Osteology Of Rhombomylus (Mammalia, Glires): Implications For Phylogeny And Evolution Of Glires
Fig. 7. Deciduous premolars of Rhombomylus (IVPP V7885). A–C, Occlusal, labial, and lingual views of the right dP3 and dP4; D–F, occlusal, lingual, and labial views of the right dp3 and dp4.
Fig. 6 in The Osteology Of Rhombomylus (Mammalia, Glires): Implications For Phylogeny And Evolution Of Glires
Fig. 6. Upper and lower incisors of Rhombomylus (IVPP V5288). A–C, Anterior, posterior, and lateral views of the right upper incisor (V5288); D, medial view of a fragmentary mandible showing the end of the lower incisor in the dentary; E–G, dorsal, lateral, and medial views of the left incisor (V5288). Scale bar for all except D.
Fig. 5 in The Osteology Of Rhombomylus (Mammalia, Glires): Implications For Phylogeny And Evolution Of Glires
Fig. 5. Measurements of jaw muscle moment arms and resistance arms of the incisor and molar in Rhombomylus and other mammals. dl, Dental (molar) length; ml, mandibular length; mma, moment arm of the anteriormost fiber of the anterior deep masseter; mmv, moment arm of the ventralmost fibers of the superficial masseter; mt, moment arm of the dorsalmost fibers of the temporalis rai, resistance arm of the incisor; and ram, resistance arm of the molar. Measurements were made between the landmarks using an UltraCal Mark III caliper. The results are provided in appendix 4.
Fig. 20 in The Osteology Of Rhombomylus (Mammalia, Glires): Implications For Phylogeny And Evolution Of Glires
Fig. 20. Enamel microstructures of left upper molars of Rhombomylus (IVPP V7490), corresponding to sections labeled in figure 19. See text for description and discussion.
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