Lena Landing: 13-2-3 (Cambrian of the United States)

Where: Arkansas (34.7° N, 93.2° W)

• Paleocoordinates: 15.1° N, 115.7° W (Wright 2013)

• coordinate estimated from map

• local area-level geographic resolution

When: Elvinia trilobite zone, Collier Shale Formation, Steptoean (497.0 - 493.5 Ma)

• Subseries listed as Middle to Upper Cambrian. Trilobite article with other classes mentioned; Elvinia and Taenicephalus zones

• formation-level stratigraphic resolution

Environment/lithology: offshore shelf; poorly lithified, lenticular, calcareous shale and lithified, pyritic, peloidal limestone

• Authors note the possibility that the fauna is an intact allochthon shallow shelf assemblage from shallow shelf; Stitt (1994) notes that the fauna is preserved in outer shelf, dark limestone that was transported, with some fragmentation, into slope of basinal settings by mass gravity and debris flows
• Light gray to light bluish-gray calcareous shale and low-grade slate with abundant lenses and beds of dark gray to black, slightly silty, pyritic, peloidal to micritic limestone

Size classes: macrofossils, mesofossils

Primary reference: J. H. Stitt, J. D. Ruckker, N. D. Boyer and W. D. Hart. 1994. New Elvinia zone (Upper Cambrian) trilobites from new localities in the Collier Shale, Ouachita Mountains, Arkansas. Journal of Paleontology 68:518-523 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 225281: authorized by Pete Wagner, entered by Pete Wagner on 01.05.2022

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Trilobita
 Olenida - Dokimokephalidae
Dokimocephalus indet.
Dokimocephalus indet. Walcott 1924 trilobite
 Olenida - Pterocephaliidae
Pulchricapitus fetosus, Cernuolimbus monilis, Pterocephalia sanctisabae, Anechocephalus aphelodermus
Pulchricapitus fetosus Hohensee and Stitt 1989 trilobite
Cernuolimbus monilis Stitt et al. 1994 trilobite
Pterocephalia sanctisabae Roemer 1849 trilobite
 Olenida - Idahoiidae
Pyttstrigis dicilia
Pyttstrigis dicilia Hohensee and Stitt 1989 trilobite
 Ptychopariida - Elviniidae
Irvingella major, Elvinia roemeri, Elvinia cf. granulata
Irvingella major Ulrich and Resser 1924 trilobite
Elvinia roemeri Shumard 1861 trilobite
Elvinia cf. granulata Resser 1942 trilobite
 Ptychopariida - Phylacteridae
Cliffia lataegenae, Aphelotoxon lumaleasa
Cliffia lataegenae Wilson 1949 trilobite
Aphelotoxon lumaleasa Hohensee and Stitt 1989 trilobite
Artiopoda
 Agnostida - Agnostidae
Kymagnostus harti, ? Neoagnostus dilatus
Kymagnostus harti Hohensee and Stitt 1989
? Neoagnostus dilatus Hohensee and Stitt 1989