Locality 8, Clarkston Mountains, Zone "J" (Ordovician of the United States)

Where: Box Elder County, Utah (41.9° N, 112.1° W: paleocoordinates 7.6° S, 79.7° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Pseudocybele nasuta trilobite zone, "Upper Cherty" Member (Garden City Formation), Blackhillsian (474.9 - 470.0 Ma)

• 10 foot interval beginning at 1519 feet above base of formation

Environment/lithology: shallow subtidal; lithified, gray limestone

• "Light gray, thinly laminated, non-cherty, crystalline limestone."

Size class: macrofossils

Collected by R. J. Ross, Jr. in 1946-1947; reposited in the YPM

Primary reference: R. J., J.r. Ross. 1951. Stratigraphy of the Garden City Formation in northeastern Utah, and its trilobite faunas. Yale Peabody Museum of Natural History Bulletin 6:1-161 [S. Finnegan/S. Finnegan/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 103831: authorized by Melanie Hopkins, entered by Melanie Hopkins on 02.02.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

• In description of section, Ross indicates that collection includes "complete trilobite assemblage of Zone 'J'" (p. 18); taxonomic list of trilobites from faunal lists on p. 27-28.
Show authors, comments, and common names
Rhynchonellata
 Orthida - Finkelnburgiidae
Diparelasma sp.
Diparelasma sp. Ulrich and Cooper 1936
 Orthida - Hesperonomiidae
Hesperonomia sp.
Hesperonomia sp. Ulrich and Cooper 1936
Strophomenata
 Billingsellida - Polytoechiidae
Tritoechia sp.
Tritoechia sp. Ulrich and Cooper 1936
Trilobita
 Asaphida - Asaphidae
Lachnostoma latucelsum, Kirkella declevita, ? Isoteloides sp.
Lachnostoma latucelsum Ross 1951 trilobite
Kirkella declevita Ross 1951 trilobite
? Isoteloides sp. Raymond 1910 trilobite
 Phacopida - Cheiruridae
"Kawina sexapugia" = Forteyops sexapugia
"Kawina sexapugia" = Forteyops sexapugia Ross 1951 trilobite
 Phacopida - Pliomeridae
Pseudocybele nasuta n. sp.
Pseudocybele nasuta n. sp. Ross 1951 trilobite
 Proetida - Bathyuridae
"Eleutherocentrus williamsi" = Acidiphorus williamsi
"Eleutherocentrus williamsi" = Acidiphorus williamsi Ross 1951 trilobite
 Proetida - Dimeropygidae
Dimeropygiella caudanodosa
Dimeropygiella caudanodosa Ross 1951 trilobite
 Proetida - Telephinidae
Carolinites genacinaca n. sp.
Carolinites genacinaca n. sp. Ross 1951 trilobite