Zoology 365
Biology of Mammals
Spring Semester, 2006
Terri McElhinny- Michigan State University
| Zoology 365 |
Biology of Mammals |
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Spring Semester, 2006 |
Terri McElhinny- Michigan State University |
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It's virtual lab practical time:
1. The first skull has monocuspid teeth, supraorbital processes, a transverse groove along the cusps of the upper incisors, and one bone in the postorbital process of the zygomatic arch. Family?
2. The next skull had multi-cusped teeth good for grabbing fish or crabs, no supraorbital process, the postorbital process of the zygomatic is made up of two bones. Family?
3. The next station has a huge skull with two tusks. Family?
4. The skull is one with a locking jaw and a dumbbell-shaped sideways last upper molar. Family?
5. The next skull is kind of non-descript, but you note that it has bunodontish teeth, little paraoccipital processes and obvious mastoid processes. Family?
6. This skull is about the size of the Procyonidae, but it has sharper, triangle-shaped teeth. There is a space on both sides of the first upper premolar. Also, the septum in the bulla is oblique (at an angle) to the midline of the skull (it makes an "H" with the sides of the bulla).
7. What would that previous skull have been, if it had a gap only anterior to the first upper premolar? Also, the septum of the bulla would be perpendicular to the midline of the skull (forming a "V")
Next you hit a run of genus species questions. Some have skulls, some skins, some both. You recognize the animals immeditaely, and know their common names, the challenge is to remember their scientific names.....
8. Coyote
9. Timber wolf
10. Red fox
11. American black bear
12. Raccoon
13. River otter
14. Striped skunk
15. American badger
16. Lynx
17. Cougar (a.k.a. mountain lion or puma)
18. Bobcat
19. Next is a large skull with big canines but bunodont teeth (the last upper molar is elongate), tiny premolars and flat bullae. Family?
20. Here's a skull with sharp canines, a shorter rostrum than a dog skull, and pointy triangle sharp teeth, fewer teeth than a dog, and a nice occipital ridge (=nuchal crest)on the back of the skull. Family?
21. Next skull has a short rostrum, HUGE teeth, and the sagittal crest is so big that it arches posteriorly over the formen magnum. Family?
22. This is a skull with almost no sagittal crest, reduced, widely spaced teeth, and the palate is a perfect "U". Family?
23. The last skull has a long rostrum, a nice carnassial pair, but the teeth posterior to this pair look rather bunodonty. Family?
24. What is the Suborder of the F. Mustelidae?
25. What Suborder are all the aquatic carnivores in?
26. What is the range of Family Odobenidae?
27. What is the range of Hyaenidae?
28. What is the range of Phocidae?
29. What is the range of Ursidae?
30. What is the range of Herpestidae?