Gold Spring Quarry 1 (MNA, MCZ, TMM 45609) (Jurassic to of the United States)

Also known as Harvard University Gold Springs Quarry, Eocaecilia Quarry

Where: Coconino County, Arizona (35.8° N, 111.1° W: paleocoordinates 19.4° N, 49.8° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Silty Facies Member (Kayenta Formation), Sinemurian to Sinemurian (199.3 - 182.7 Ma)

• Palynoflorulle, Scelidosaurus scutes, and magnetostratigraphy suggests Kayenta may be Sinemurian and/or Pliensbachian (Curtis and Padian 1999). Oligokyphus collected from the middle third of the Kayenta sequence (Sues 1985).

• bed-level stratigraphic resolution

Environment/lithology: "floodplain"; paleosol/pedogenic, green, red, blue, silty claystone

• "These claystones have been interpreted as paleosols formed within floodplain overbank deposits (Clark and Fastovsky 1986)." The source of the southern silty facies (versus northern typical facies) was the Cordilleran magmatic arc to the southeast (in Luttrell 1987, from Sues et al. 1994), whereas the source of the typical facies was the Uncompahgre Uplift in Colorado.
• "...the fossils come from an interface of red and green claystones in the "Upper Blue Zone" of fine-grained sediments." Material collected predominantly from blueish-greenish siltstones.

Size classes: mesofossils, microfossils

Collected in 1981; reposited in the MCZ

Collection methods: bulk, surface (float), sieve,

• MNA, Museum of Northern Arizona

Primary reference: F. A. Jenkins, Jr., A. W. Crompton, and W. R. Downs. 1983. Mesozoic mammals from Arizona: new evidence on mammalian evolution. Science 222:1233-1235 [R. Whatley/R. Whatley/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 27716: authorized by John Alroy, entered by Robin Whatley on 23.12.2002, edited by Matthew Carrano, John Alroy and Bethany Allen

Creative Commons license: CC BY (attribution)

Taxonomic list

• Numbers of specimens are the minimum number (from specimen ID's) stated in the text.

•Tritylodontidae indet. (MCZ 8845, 8848) is represented by juvenile individuals and is distinct from Oligokyphus sp. (Sues 1985).

unclassified
  -
Vertebrata indet.2 Lamarck 1801
MCZ 9056; MCZ 9063, 9064, jaws; MCZ 9073-9078, limb bones; MCZ 9205, 9206, limb bones; MCZ 9065, bone fragment; MCZ 9079-9081, 13 fragmentary bones;MCZ 9087, 9088, unidentified elements
Reptilia
 Diapsida -
Diapsida indet.2 diapsid
MCZ 9177-9184, teeth; catalogued as 8 specimen numbers but may represent up to 31 teeth
 Archosauria -
? Archosauria indet.2 archosaur
MCZ 9189-9196, + 1 uncatalogued specimen, teeth; MCZ 9197 + 2 uncatalogued specimens, vertebrae
 Dinosauria -
Dinosauria indet.2 dinosaur
MCZ 9185-9188, teeth
 Ornithischia -
cf. Scutellosaurus sp.1 Colbert 1981 ornithischian
TMM 45609-5, 7–9
? Scutellosaurus sp.3 Colbert 1981 ornithischian
TMM 45609-10, 11
Scutellosaurus lawleri6 Colbert 1981 ornithischian
TMM 45609-4, 6
 Ornithischia - Heterodontosauridae
Heterodontosauridae indet.10 Romer 1966 heterodontosaurid
MCZ 9092
 Loricata -
Crocodylomorpha indet.2 crocodilian
MCZ 9044, dermal armor fragment
 Lepidosauria -
Sphenodontia indet.2 lepidosaur
MCZ 9036-9040, jaw fragments
 Eosuchia - Sphenodontidae
Navajosphenodon sani n. gen. n. sp.8
Navajosphenodon sani n. gen. n. sp.8 Simões et al. 2022 lepidosaur
MNA.V.12442 (holotype, previously cataloged as MCZ VP 9016), a fully articulated skeleton, including the skull, mandibles, axial and appendicular skeleton; also MCZ VP 9098, MCZ VP 101562, MCZ VP 9099, MCZ VP 101564, MCZ VP 101575, MCZ VP 9094, MCZ VP 9102, MCZ VP 9103, MCZ VP 101569, MCZ VP 101563, MNA.V.8726(A-F), MNA.V.8727
 Testudinata -
Kayentachelys sp.3 Gaffney et al. 1987 turtle
TMM 45609-1–3
Kayentachelys aprix n. gen. n. sp.4 Gaffney et al. 1987 turtle
MNA V1558
Osteichthyes
 Morganucodonta - Megazostrodontidae
Dinnetherium nezorum n. gen. n. sp.
Dinnetherium nezorum n. gen. n. sp. Jenkins et al. 1983 mammaliaform
MNA V3221; MCZ 20870-20877
 Morganucodonta - Morganucodontidae
Morganucodon sp. Kuehne 1949 mammaliaform
MCZ 20878
 Therapsida - Haramiyidae
? Haramiyidae indet. Simpson 1940 mammaliaform
MCZ 20879
 Therapsida - Tritylodontidae
Tritylodontidae indet.9 Cope 1884 mammaliamorph
differs from Oligokyphus sp.
Oligokyphus sp.9 Hennig 1922 mammaliamorph
> 42 specimens
Amphibia
 Temnospondyli -
Lissamphibia indet.2 tetrapod
MCZ 9025-9028, jaws; MCZ 9031, 9032, vertebrae; MCZ 9035, atlas vertebra; MCZ 9034 + 4 uncatalogued specimens, proximal femora; MCZ 9066, 9067, proximal humeri
? Lissamphibia indet.2 tetrapod
MCZ 9068-9072, proximal limb bones, possibly humeri
Eocaecilia micropodia n. gen. n. sp.5 Jenkins and Walsh 1993 tetrapod
MNA V8066 (type); MNA V8053, 8054, 8055, 8057, 8058, 8059, 8060, 8062, 8063, 8064, 8065, 8066, 8067, 8068, 8069, 8070, 8071, 8072, 8073, 9346; MCZ 9011A, 9015, 9095, 9152, 9156. 9158, 9163, 9166, 9167, 9169A, 9171A, 9173, 9231A, 9233, 9235, 9237, 9238A, 9241, 9242
 Caudata - Urodela
Urodela indet.2 salamander
MCZ 9017, 9018, atlas vertebrae
 Salientia -
Anura indet.2 frog
MCZ 9019, distal humerus; MCZ 9020-24, ilia
 Salientia - Notobatrachidae
Prosalirus bitis n. gen. n. sp.7
Prosalirus bitis n. gen. n. sp.7 Shubin and Jenkins 1995 frogs and relatives
MNA V 8725 (type), MCZ 9324 A, MCZ 9323 A
Gnathostomata
  -
? Chondrichthyes indet.2 Huxley 1880 cartilaginous fish
MCZ 13897