. Bonner zoologische Monographien. Zoology. SMITH, ON THE PHYLOGENETIC AFFINI TY OF THE EXTINCT ACRODONTAN TINOSAURUS. FIG. 3. Left maxilla fragment of Tinosaurus sp. MPH, PTRM 19340, in (a) lateral, (b) dorsal, and (c) medial views. Abbreviations: , facial process (posterior remnant); infl., inflection point; , jugal groove; , palatal shelf; , palatine process. roughly twice as long as a tooth in the same portion of the bone; the same specimen also preserves what is probably the last labial (alveolar) foramen at the same transverse level as the ultimate SAF. The
. Bonner zoologische Monographien. Zoology. SMITH, ON THE PHYLOGENETIC AFFINI TY OF THE EXTINCT ACRODONTAN TINOSAURUS. FIG. 3. Left maxilla fragment of Tinosaurus sp. MPH, PTRM 19340, in (a) lateral, (b) dorsal, and (c) medial views. Abbreviations: , facial process (posterior remnant); infl., inflection point; , jugal groove; , palatal shelf; , palatine process. roughly twice as long as a tooth in the same portion of the bone; the same specimen also preserves what is probably the last labial (alveolar) foramen at the same transverse level as the ultimate SAF. The lateral face of the bone is divided into two surfaces by a longitudinal ridge (Fig. 3a); dorsal to the ridge is the laterally directed facial process, ventral to it is a ven- trolaterally directed surface. In PTRM 19533 the distance between the jaw parapet and this ridge de- creases anteriorly. Tooth morphology is similar to that previously described for this taxon (Pearson 1998). Tooth im- plantation is pleuracrodont. The teeth increase in mesiodistal length as well as apicobasal height poste- riorly. The lingual tooth surfaces are not well pre- served, which probably reflects both wear in life as well as postmortem damage. Comparisons: PTRM 19340 differs from the max- illa of most agamids in that the palatine facet does not appear to extend to the posterior end of the palatine process of the maxilla. In examined Agami- nae (Fig. 4a), Hydrosaurus, Amphibolurinae, Draco- ninae and Uromastyx (Fig. 4c), the maxillary process of the palatine is medially extensive posteriorly, so that the facet it forms is found along the entire pos- terior margin of the palatine process of the maxilla. In contrast, the facet does not extend to the poste- rior margin of the process in Leiolepis (Fig. 4b). This is additionally the case in Chamaeleonidae. Unfor- tunately, the palatine process is incomplete in both fossil specimens, so this observation must be re- garded as tentative. The posterior re
Size: 1845px × 1354px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjectzoology
