Translations:AY Honors/Cetaceans/Answer Key/15/en
From Pathfinder Wiki
| Characteristic | Odontoceti toothed whale | Mysticeti baleen whales |
| Feeding | Echolocation, fast | Filter feeder, not fast |
| Size | Smaller (except Sperm whale and beaked whale) | Larger (except pygmy right whale) |
| Blowhole | One | Two |
| Dentition | Teeth | Baleen plates |
| Melon | Ovoid, in anterior facial region | Vestigial or none |
| Skull and facial tissue | Dorsally asymmetric | Symmetric |
| Sexual dimorphism | Some species have larger males | Females always larger |
| Mandible | Symphyseal (fused anteriorly) | Nonsymphyseal |
| Pan bone of lower jaw | Yes | No |
| Maxillae projection | Outward over expanded supraorbital processes | Under eye orbit, with bony protuberance anterior to eye orbit |
| Olfactory nerve and Olfactory bulb | Absent& | Vestigial& |
| Periotic bone | tympanic bulla | Fused with skull& |
- ↑ Dolphin Senses
- ↑ Baleen Whales: Senses
- ↑ Hooker, Sascha K. (2009). "Toothed Whales. Overview". In Perrin, William F.; Wursig, Bernd; Thewissen, J. G. M.. Encyclopedia of Marine Mammals (2 ed.). Burlington Ma. 01803: Academic Press. p. 1174. Template:Hide in printTemplate:Only in print. http://www.elsevier.com/wps/find/bookdescription.cws_home/716899/description#description.
