. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 246 Bulletin Museum of Comparative Zoology, Vol. 151, No. 4 p. mus. p. mus la. re Figure 16. Left postdentary elements of Kayentatherium wellesi. MCZ 8812. A) medial view. B) lateral view. C) posterior view. (1956: 38) has interpreted this feature in Oligokyphus as a processus muscularis for a muscle homologous to the mammalian M. tensor tympani. The tritylodontid articular rod differs from those in Cynognathiis (Kermack et al., 1973: figs. 25, 26) and Diademodon (Kermack et al, 1973: pi. 3, figs. F, G) especially in
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 246 Bulletin Museum of Comparative Zoology, Vol. 151, No. 4 p. mus. p. mus la. re Figure 16. Left postdentary elements of Kayentatherium wellesi. MCZ 8812. A) medial view. B) lateral view. C) posterior view. (1956: 38) has interpreted this feature in Oligokyphus as a processus muscularis for a muscle homologous to the mammalian M. tensor tympani. The tritylodontid articular rod differs from those in Cynognathiis (Kermack et al., 1973: figs. 25, 26) and Diademodon (Kermack et al, 1973: pi. 3, figs. F, G) especially in lacking the pronounced boss on the surangular for contact with the squamosal (incorrectly identified as the retroarticular process by Kermack et al., 1973) and, furthermore, in the distinct an- teromedial inclination of the articular fac- et. Prearticular (Pra). The posterior sutur- al contact of the prearticular with the ar- ticular has been obliterated (Fig. 16A) but otherwise the bone is clearly distinct from the remainder of the articular complex. It forms a bony rod medial and slightly ven- tral to a median gap that is laterally en- closed by the surangular. The ventrolat- eral surface of the prearticular contacts the angular below. Angular (An). The angular is situated ventral and lateral to the articular com- plex (Fig. 16). Its posterior portion forms a thin dorsal flange and terminates just in front of the posterior end of the retroar- ticular process. It is fairly thick and over- laps the lateral aspect of the articular. More anteriorly, a large reflected lamina () emerges from the ventrolateral margin of the angular rod and extends posteroventrally. It is fairly wide antero- posteriorly and only slightly curved back- ward. The medial surface of the broad proximal base of the lamina is excavated. Anterior to the reflected lamina the an- gular continues as a tapering rod (MCZ 8812, MNA V3141). HYOID APPARATUS A number of disarticulated elements found in the matrix
Size: 2129px × 1173px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorharvarduniversity, bookcentury1900, booksubjectzoology
