. Breviora. BREVIORA No. 373 but in a number of regards his materials supplemented ours and substantiated our conclusions. I am deeply grateful to Sr. Bona- parte and the authorities of the Instituto Lillo for placing this material at my disposal. LuPEROsucHUS FRACTUS gen. et sp. nov. Combined generic and specific diagnosis. A large thecodont, with an estimated skull length of about 60 cm, probably pertain- able to the family Rauisuchidae. A shtlike opening apparently present posterior to the nares between premaxilla and maxilla; antorbital opening large; apparently no parietal foramen; latera
. Breviora. BREVIORA No. 373 but in a number of regards his materials supplemented ours and substantiated our conclusions. I am deeply grateful to Sr. Bona- parte and the authorities of the Instituto Lillo for placing this material at my disposal. LuPEROsucHUS FRACTUS gen. et sp. nov. Combined generic and specific diagnosis. A large thecodont, with an estimated skull length of about 60 cm, probably pertain- able to the family Rauisuchidae. A shtlike opening apparently present posterior to the nares between premaxilla and maxilla; antorbital opening large; apparently no parietal foramen; lateral temporal opening with vertical posterior border; archosaur type of otic notch partially developed. Holotype of the species. La Plata Museum 1964-X1-14-9, an incomplete skull, consisting of most of the dermal roof and part of the left side of the "face" collected from the Chanares Forma- tion in La Rioja Province, Argentina, north of the north fork of the Chanares River, about 5 km NE of the point where this river emerges into the Piano de Talampaya. The generic and specific names refer to the fragmentary and perplexing nature of the type material. I am indebted to National Science Foundation Grant GB-2454 for aid in the collecting of the material and to further grants for its preparation and for publication Figure 1. Side view of the fragmentary type skull of Liiperosiicluis frac- tus. as preserved. X 1 Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harvard University. Museum of Comparative Zoology. Cambridge, Mass. , Museum of Comparative Zoology, Harvard University
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