Reference for Niddah 47:6

בין רבי זכאי לרבי ינאי איכא בינייהו טרפה חיה מר סבר

The latter holds that a trefah animal can survive<span class="x" onmousemove="('comment',' Hence his ruling that the birth is valid unless the missing part of the body extended as high as the lower orifices. ');">⁶</span>

Jastrow