ber (locs. 13, 15). Goniopholis is much more widely distributed, occurring

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throughout the Morrison as shed teeth or isolated scutes. Two species, G. fe/chi (from loc. 15) and G. lucasi (from loc. 9) have been named from the GPPA on the basis of skulls, but have not been adequately dis- tinguished from each other. The terrestrial crocodilomorph Ha//opus victor was one of the first vertebrates named by Marsh (1877) from Garden Park. Originally identified as a dinosaur, its true crocodilomorph affinity was not recognized until restudied by Walker (1970). Only a single speci- men is known (loc. 7) and for many years its exact stratigraphic position was problematic {Ague and others, 1995).

A single pterosaur, ICepodacty/us grandis, is known from the Small Quarry (Appendix 1, Fig. 2). It is a very large pterodactyloid with an esti- mated wing span of 2.5 m (Harris and Carpenter, 1996}.

Dinosaurs

Sauropods; Sauropod dinosaurs are especially common in the Morrison Formation and their presence almost characterizes the formation. In Garden Park, sauropods occur throughout the Formation, from about four meters above the base to about three meters below the top (Appendix 1, and Fig. 2). The most common genus in the lower member is the cetio- saurid Hap/ocanthosaurus (Appendix 1). It is most abundant at Felch Quarry 1, where it makes up more than 40'/o of the sauropod specimens; elsewhere in Garden Park it occurs as solitary individuals. Hap/ocant/zosaurus has not been found in the upper member, perhaps showing that it was replaced ecologically by another sauropod, Camarasaurus, which does occur there. Brachiosaurus is known only from Felch Quarry 1 making it of limited biostratigraphic utility (Appendix 1}. DiP/odocus is also known from Felch Quarry 1, and two other sites in the lower member {Appendix 1, Fig. 2). Apatosaurus is present in the Felch Quarry, and in one of Cope's quarries (see McIntosh, this volume), thus it is ranges throughout the Morrison (Appendix 1, Fig. 2). The giant diplodocid Amphicoelias fragillium occurs with Camarasaurus in the upper Member, whereas Amphicoelias altus occurs stratigraphically higher, about 3m below the top of the Morrison (Appendix 1, Fig. 2).

Camarasaurus is the most abundant sauropod in the upper member (Appendix I). Two species are present in the GPPA. Camarasaurus grandis occurs low in the upper member in an area called Green Acres and the Small Quarry {Fig. 2, Appendix 1, Locs. 21, 22), while C. supremus occurs high in the upper member in the vicinity of Cope's Nipple (Fig. 4). Amphicoelias latus was named by Cope (1877) for material from the "Oil

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