1124


Journal of Paleontology


3/mm. Both tooth fragments in NJSM 14404 are labiolingually compressed, although apicobasal curvature and the ziphodont condition cannot be confirmed in either.


Material.—NJSM 14404, tooth fragments (Figure 6.1).


Remarks.—NJSM 14404 is referred to Dromaeosauridae based on the following features: recurved, ziphodont tooth with apically oriented distal denticles.


Theropoda indet. Figure 7


Description.—NJSM15319 is the very small tooth of a theropod dinosaur, measuring 5mm apicobasally. The specimen is very


recurved, more so than the tyrannosauroid but less so than the dromaeosaurid teeth from Ellisdale. NJSM 15319 preserves small, square, tightly packed denticles on its distal surface, unlike the apically recurved denticles of the dromaeosaurid or the peg- like, widely separated denticles of the tyrannosauroid teeth from Ellisdale. Mesially, the tooth is damaged and no denticles are preserved. The tooth is ziphodont, measuring 0.5mm(CBL) and 0.24mm (CBW) along the base. NJSM 16623 is much larger than NJSM 15319, measuring 16mm apicobasally and repre- senting a medium-sized theropod dinosaur. In this dimension, the tooth is slightly smaller than the smallest tooth included in the large dromaeosaurid morphotype and significantly smaller than the tyrannosauroid teeth of the Ellisdale site. The tooth is recurved apically, preserving no denticles. In basal view, the tooth is elliptical in form and ziphodont (CBW/CBL=0.286).


Figure 7. Indeterminate theropod specimens NJSM 16623 (1–3), NJSM 15319 (4, 5), and NJSM 13096 (6) in labial/lateral (1, 4, 6), lingual (2, 5), and basal (3) views. Scale bar=5mm (1–5),=50mm (6).


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