THE AFFINITIES OF PLAGIAULAX (MULTITUBERCULATA)
- 1After examination of the Plagiaulax mandible 47728, Friant concluded that the structure of the masseteric fossa indicates that Plagiaulax is a diprotodont marsupial (phalangeroid).
- 2The holotype of P. becklesii, a right mandibular ramus, has been prepared by the acetic-acid technique so that the posterior half is free from matrix. Its structure is compared with that of mandible 47728.
- 3It is shown that the structures which, in mandible 47728, were interpreted by Friant as indicating particular marsupial affinities are all the result of post-mortem crushing and that there is no evidence whatever of such affinities.
- 4Further preparation has revealed that the mandible of P. becklesii possesses a wide masseteric shelf which is apparently similar to those found in Taeniolabis and some Ptilodontidae.