Excavation Stage IV Skull - Forelimb worksheet UPDATED

GEOL207: Dinosaur World Name: Lab Section: 200 500 501 502 503 504 505 The bone may belong to a Velociraptor due to the bone being larger and more curved than the organism that we inspected. The bone type is a ungual as well. 5. Analyze the skull of the organism to help answer the following questions: a. Describe the size/shape of the teeth in the organism. What type feeding strategy do you think that this organism exhibits? How might these teeth differ from organisms of a different feeding strategy? 2pts The teeth are large and cone-shaped which may indicate the organism was a carnivore in which scavengers have smaller but sharper teeth, and herbivores have flatter teeth. b. Do your best and count the number of teeth on this skull for each region (premaxillary, maxilla (upper jaw) and dentary/mandible. How many of each of these teeth does the dinosaur have? 2pts Premaxillary teeth: ___4_______ Maxillary teeth: ___14_______ Dentary teeth: ____11______ c. Suppose that this organism is a theropod dinosaur, use the Table 1 (below) from Currie et al. (2003) to compare the number of teeth that you counted to known theropod dinosaurs. How does the mystery organism compare? Can you use any of this information to help garner a more specific identification i.e., do the number of teeth match for each region match your current dinosaur identification? Explain. 2pts Our given information most likely indicates that it is a T-Rex due to the number of premaxillary, maxillary, and dentary teeth are closet to it. 6. What is the approximate length of the dinosaur? Hint: You may need to sum the length of the caudal region from Stage II, the length of the Spinal Region from Stage III, and the skull length from Stage IV. Based on your hypothesis of the genus species, what does the overall size of this dinosaur indicate about its age? 2pts

GEOL207: Dinosaur World Name: Lab Section: 200 500 501 502 503 504 505 Table 4. Bone catalog for Excavation Stage IV. Bone Number Bone Identification Skeletal Region Measurements Taphonomic Condition Other Notes Length (cm) Width (cm) 106 Atla Vertebra Whole 107* Dentary Skull 73.5 20 Whole 108* Maxillary Skull 79.5 29.5 Whole 109* Scapula Pectoral 56 14.5 Whole 110 Coracoids Pectoral Whole 111* Humerus Pectoral 29.5 8 Whole 112 Ulna Forelimb Whole 113 Metacarpals Forelimb Whole 114 Phalanges Forelimb Whole 115 Phalanges Forelimb Whole 116 Claw Forelimb Whole 117 Radius Forelimb Whole 118* Metacarpals Forelimb 4.5 3 Whole 119* Phalanges Forelimb 10.5 3 Whole 120* Claws Forelimb 7 3.5 Whole 121 (?)