Marathon Uplift, Woods Hollow Boulders Fm., Aphelaspis Zone (Cambrian of the United States)

Where: Texas (30.2° N, 103.2° W: paleocoordinates 14.2° S, 96.5° W)

• coordinate based on political unit

When: Aphelaspis trilobite zone, Woods Hollow Boulders Formation, Steptoean (501.0 - 485.4 Ma)

• "Aphelaspis zone."

Environment/lithology: offshore shelf; green conglomerate

• "ls boulders in dark greenish clay shale, outer shelf (BA5)."

Size class: macrofossils

Primary reference: J.L. Wilson. 1954. Late Cambrian and Early Ordovician Trilobites from the Marathon Uplift, Texas. Journal of Paleontology 28(3):249-285 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 237: authorized by Jack Sepkoski, entered by Mike Sommers on 20.11.1998

Creative Commons license: CC BY (attribution)

Taxonomic list

• "Wilson, 1954." [trilobites only]
 Agnostida - Agnostidae
Glyptagnostus sp. Whitehouse 1936 trilobite
Homagnostus sp. Howell 1935 trilobite
 Agnostida - Diplagnostidae
Pseudagnostus sp. Jaekel 1909 trilobite
 Olenida - Olenidae
Parabolinella sp. Brögger 1882 trilobite
2 species
Olenus sp. Dalman 1827 trilobite
 Olenida - Aphelaspididae
Aphelaspis sp. Resser 1935 trilobite
 Olenida - Parabolinoididae
Taenicephalus sp. Ulrich and Resser 1924 trilobite
 Olenida - Pterocephaliidae
Pterocephalia sp. Roemer 1849 trilobite
originally entered as "Pterocephalina sp."