Annals of the South African MuseumAnnale van die Suid-Afrikaanse Museum . MAMIPt(post) art MAME(med). attapon Fig. 3. The skull and lower jaw of Lystrosaurus. A. Dorsal view of skull. B. Ventral view of skull with left lower jaw in place. C. Lateral view of skull and lower jaw. The areas of origin and insertion of the external adductor and posterior pterygoideus muscles are indicated by parallel lines. the lateral margin of the temporal roof. The establishment of muscle originhere probably represents an invasion of muscle attachment from the anteriorface of that part of the squamosal forming t
Annals of the South African MuseumAnnale van die Suid-Afrikaanse Museum . MAMIPt(post) art MAME(med). attapon Fig. 3. The skull and lower jaw of Lystrosaurus. A. Dorsal view of skull. B. Ventral view of skull with left lower jaw in place. C. Lateral view of skull and lower jaw. The areas of origin and insertion of the external adductor and posterior pterygoideus muscles are indicated by parallel lines. the lateral margin of the temporal roof. The establishment of muscle originhere probably represents an invasion of muscle attachment from the anteriorface of that part of the squamosal forming the posterior wall of the temporalfossa. This condition, which is a distinct departure from that found in sphena-codontids, was probably common among primitive therapsids as it is alsofound in gorgonopsids, Biarmosuchus, and Eotitanosuehus (personal observa-tions). The extent of this muscle attachment on the postorbital also approachesthat seen in dicynodonts ( Lystrosaurus, Fig. 3A; also see Crompton &Hotton 1967; Cluver 1975). Venjukovia, however, does not achieve the special-ized condit
Size: 1815px × 1376px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorsouthafr, bookcentury1800, bookdecade1890, bookyear1898
