Lab6_Excavation Stage II_NicholasH

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Texas A&M University *

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207

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Anthropology

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Apr 3, 2024

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docx

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Dinosaur Excavation Stage II Part I: Excavation Stage II – Caudal Region Below is “site map” image of the excavation site(s). These images, and others you will need to complete this assignment, are available at: https://sites.google.com/tamu.edu/geol- 207-dinosaur-world-ex2/home . An arrow is labeled in the top right corner of your image indicating the direction of North. On your site map image, each bone has been numerically labeled. 1) Identify and Catalog the Bones: Use Table 2 below to catalog the bones recovered during the excavation. For each numbered bone, you should identify the type of bone and the region of the body the bone is from (in this lab, all bones are from the caudal region). Under notes, provide any features present that are important sharded derived characters that could help you in your identification. You should also provide an approximate measurement for each bone marked with a * using the scale bars on the zoom- in photos available at : https://sites.google.com/tamu.edu/geol-207-dinosaur-world-ex2/home Table 2. Bone catalog for Excavation Stage II. (10 pts) Bone Number Bone Identification Skeletal Region Measurements Other Notes Length (cm) Width (cm) 22* Caudal Vertebrae Caudal 18cm 11cm Implied start of tail 23 Caudal Vertebrae Caudal -- -- 24 Caudal Vertebrae Caudal -- -- 25 Caudal Vertebrae Caudal -- -- 26 Caudal Vertebrae Caudal -- -- 27 Caudal Vertebrae Caudal -- -- 28 Caudal Vertebrae Caudal -- -- 29 Caudal Vertebrae Caudal -- -- 30 Caudal Vertebrae Caudal -- -- 31 Caudal Vertebrae Caudal -- -- 32 Caudal Vertebrae Caudal -- -- 33 Caudal Vertebrae Caudal -- -- 34* Caudal Vertebrae Caudal 12cm 10cm 35 Caudal Vertebrae Caudal -- -- 36 Caudal Vertebrae Caudal -- -- 37 Caudal Vertebrae Caudal -- -- 38 Caudal Vertebrae Caudal -- -- 39 Caudal Vertebrae Caudal -- -- 40 Caudal Vertebrae Caudal -- --

41* Caudal Vertebrae Caudal 6cm 11cm 42 Caudal Vertebrae Caudal -- -- 43 Caudal Vertebrae Caudal -- -- 44 Caudal Vertebrae Caudal -- -- 45 Caudal Vertebrae Caudal -- -- 46 Caudal Vertebrae Caudal -- -- 47* Caudal Vertebrae Caudal 5cm 10cm 48* Fused Vertebrae Caudal 7cm 60cm Very end tip of tail (composed of multiple stiff vertebrae with chevrons) 49 Chevron Caudal -- -- First chevron 50* Chevron Caudal 4cm 14cm 51 Chevron Caudal -- -- 52 Chevron Caudal -- -- 53 Chevron Caudal -- -- 54 Chevron Caudal -- -- 55 Chevron Caudal -- -- 56 Chevron Caudal -- -- 57 Chevron Caudal -- -- 58 Chevron Caudal -- -- 59 Chevron Caudal -- -- 60* Chevron Caudal 5cm 4cm First triangular chevron 61 Chevron Caudal -- -- 62 Chevron Caudal -- -- 63 Chevron Caudal -- -- 63 Chevron Caudal -- -- 65 Chevron Caudal -- -- 66 Chevron Caudal -- -- 67 Chevron Caudal -- -- 68 Chevron Caudal -- -- 69 Chevron Caudal -- -- 70 Chevron Caudal -- -- 71 Chevron Caudal -- -- 72 Chevron Caudal -- -- 73 Chevron Caudal -- -- 74 Chevron Caudal -- -- 75* Chevron Caudal 6cm 5cm Last disconnected chevron 2) Interpret the Skeleton (5 pts) a) What is the approximate total length of the tail? Be sure to use the scale bars in the images to determine the length. (1 pt) I believe the tail is around 335cm long. b) Describe how the size of the caudal vertebrae changes from the proximal to the distal end of the skeletal remains? (1 pt)

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