Sue (dinosaur)
Sue is the nickname given to FMNH PR 2081, which is the largest, most extensive and best preserved "Tyrannosaurus rex" specimen ever found, at over 90% recovered by bulk. It was discovered in August 1990, by Sue Hendrickson, an explorer and fossil collector, and was named after her. After ownership disputes were settled, the fossil was auctioned in October 1997, for US $8.3 million, the highest amount ever paid for a dinosaur fossil, and is now a permanent feature at the Field Museum of Natural History in Chicago, Illinois.
Pentaceratops
In 1929 Steinberg's son, George Fryer Sternberg, discovered specimen USNM V12002, a right squamosal. "Pentaceratops" proved to be a quite common fossil in the Fruitland and Kirtland formations. It has even been used as a guide fossil: the appearance of "Pentaceratops sternbergii" in the fossil record marks the end of the Judithian land vertebrate age and the start of the Kirtlandian. Subsequent finds include specimens MNA Pl. 1668, MNA Pl. 1747, NMMNH P-27468 and USNM 2416, partial skeletons with skull; YPM 1229, a skeleton lacking the skull; UALP 13342 and UKVP 16100, skulls; UNM B-1701, USNM 12741, USNM 12743, USNM 8604, SMP VP-1596, SMP VP-1488, SMP VP-1500 and SMP VP-1712, fragmentary skulls. Apart from the San Juan Basin finds, a juvenile specimen of "Pentaceratops", SDMNH 43470, has been reported from the Williams Fork Formation of Colorado in 2006.
Sometimes the identification of a specimen as "Pentaceratops" has proven to be highly contentious. In 1998 Thomas Lehman described OMNH 10165, a very large skull and its associated skeleton found in New Mexico in 1941, and presently on display at the Sam Noble Oklahoma Museum of Natural History, as being the largest "Pentaceratops" exemplar known, with the distinction of having produced the largest known skull of any land vertebrate. However, in 2011, the skeleton was renamed as a separate genus, "Titanoceratops", due to its more derived morphology closer to "Triceratops" and lack of unique characters shared with "Pentaceratops" proper.