Sargent Ranch, SMP Loc. 450 (Cretaceous of the United States)

Also known as Target 8

Where: San Juan County, New Mexico (36.1° N, 107.8° W: paleocoordinates 43.3° N, 79.2° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Fossil Forest Member (Fruitland Formation), Late/Upper Campanian (83.5 - 70.6 Ma)

• member-level stratigraphic resolution

Environment/lithology: terrestrial; lithified shale

Size class: macrofossils

Primary reference: S. E. Jasinski and R. M. Sullivan. 2011. Re-evaluation of pachycephalosaurids from the Fruitland-Kirtland transition (Kirtlandian, late Campanian), San Juan Basin, New Mexico, with a description of a new species of Stegoceras and a reassessment of Texacephale langstoni. In R. M. Sullivan, S. G. Lucas, & J. A. Spielmann (eds.), Fossil Record 3. New Mexico Museum of Natural History and Science Bulletin 53:202-215 [G. Lloyd/G. Lloyd/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 144519: authorized by Graeme Lloyd, entered by Graeme Lloyd on 10.05.2013, edited by David Nicholson and Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Testudines -
Testudines indet.1 Batsch 1788 turtle
SMP VP-2549 five carapace fragments, SMP VP-2643 plastron fragment, SMP VP-2768 distal end of humerus, SMP VP-2777 ?limb osteoderm, SMP VP-2795 incomplete ?humerus, SMP VP-3382 two plastron fragments
 Testudines - Trionychidae
Trionychidae indet.1 Gray 1825 softshell turtle
SMP VP-2388 carapace fragments, SMP VP-2403 carapace & plastron fragments from multiple individuals, SMP VP-2404 carapace fragments, SMP VP-2442 carapace fragments from multiple taxa, SMP VP-2551 carapace fragment, SMP VP-2586 carapace fragment, SMP VP-2635 carapace fragment, SMP VP-2728 carapace fragments, SMP VP-2764 incomplete costal, SMP VP-2766 carapace fragments, SMP VP-2772 incomplete neural, SMP VP-2839 carapace fragments, SMP VP-2847 carapace fragments, SMP VP-2852 carapace fragments & associated indet. bone material
 Testudines - Adocidae
cf. Adocus sp.1 Cope 1868 turtle
SMP VP-2578 neural, SMP VP-2841 carapace fragment & associated indeterminate bone material, SMP VP-2856 incomplete costal & other carapace fragments, SMP VP-2802 costal marginal & other carapace fragments
 Testudines - Nanhsiungchelyidae
Basilemys cf. gaffneyi1 Sullivan et al. 2012 turtle
SMP VP-2797 epeiplastron, SMP VP-3366 partial plastron fragments of femur pelvic girdle & carapace/plastron
 Testudines - Pantrionychidae
cf. Aspideretoides sp.1 Gardner et al. 1995 turtle
SMP VP-2803 costal marginal & other carapace fragments
 Testudinata - Baenidae
Baenidae indet.1 Cope 1882 turtle
SMP VP-2644 nearly complete femur, SMP VP-2706 incomplete costal & plastron fragments, SMP VP-2721 carapace & plastron fragments plus associated indet. bone material
cf. Denazinemys nodosa1 Gilmore 1916 turtle
SMP VP-2853 carapace fragments
 Ornithischia - Hadrosauridae
Hadrosauridae indet.2 Cope 1869 hadrosaurid
SMP VP-2409, 2552, 2560, 2563, 2587, 2636, 2641, 2684, 2688, 2690, 2705, 2708, 2730, 2763, 2767, 2776, 2800, 2833, 2838, 2863, 3367, 3379
 Ornithischia -
Stegoceras novomexicanum n. sp. Jasinski and Sullivan 2011 ornithischian
SMP VP-2555