meter 56, Ibex (Ordovician of the United States)

Where: Utah (39.2° N, 113.5° W: paleocoordinates 7.7° S, 81.0° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Tripodus laevis conodont zone, Juab Formation, Rangerian (471.8 - 468.1 Ma)

• Zone L (Paralenorthis-Orthidiella)

• bed-level stratigraphic resolution

Environment/lithology: lithified, shelly/skeletal limestone and lithified shale

• cyclical alternations of massive limestones with interbedded recessive thin-bedded limestones and shales

Size class: macrofossils

Reposited in the USNM

Collection methods: bulk, mechanical,

Primary reference: R. A. Fortey and M.L. Droser. 1996. Trilobites at the base of the Middle Ordovician, western United States. Journal of Paleontology 70(1):73-991 [S. Holland/S. Holland/S. Holland]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 37462: authorized by Steven Holland, entered by Steven Holland on 15.03.2004, edited by Melanie Hopkins

Creative Commons license: CC BY (attribution)

Taxonomic list

 Phacopida - Pliomeridae
Ectenonotus whittingtoni Ross and Barnes 1967 trilobite
Kanoshia reticulata Fortey and Droser 1996 trilobite
Pseudomera arachnopyge Fortey and Droser 1996 trilobite
 Phacopida - Cheiruridae
Kawina wilsoni Ross 1972 trilobite
 Proetida - Dimeropygidae
Ischyrotoma juabensis Adrain et al. 2001 trilobite
 Proetida - Bathyuridae
Madaraspis magnifica Fortey and Droser 1996 trilobite
Psephosthenaspis glabrior Fortey and Droser 1996 trilobite
Petigurus inexpectatus Fortey and Droser 1996 trilobite
Punka cf. nitida trilobite
Pseudoolenoides aspinosus Fortey and Droser 1996 trilobite