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River Dolphins (Site not responding. Last check: 2007-10-18) |
 | | They may not be closely related to each other at all. |
| | All river dolphins fall into the superfamily Platanistoidae. |
| | It appears that this superfamily separated from Delphinoidae at a very early stage, right at the time of the first odontocetes. |
| library.thinkquest.org /17963/superfamily-Platanistoidae.html (1160 words) |
