Peru Eurypterid (Carboniferous of the United States)

Where: Nemaha County, Nebraska (40.5° N, 95.7° W: paleocoordinates 0.7° S, 26.9° W)

When: Indian Cave Sandstone Formation, Gzhelian (303.7 - 298.9 Ma)

• Virgilian - Waubonsee and Admire Groups.

Environment/lithology: paralic; lithified shale and micaceous sandstone

• ICS consists of fluvial to-estuarine (late lowstand systems tract) and upper estuarine

•(transgressive systems tract) facies assemblages filling incised channels or valleys witbasal incision surfaces that are also first-order bounding surfaces.

• in the massive sand a distinct shaly band scarcely a foot thick, and two to three hundred feet long. This local band is composed of thin, irregular, shaly layers, seldom a half inch thick, alternating with micaceous sand. The shale seams in the topmost two inches yield the eurypterids..shale seams cleave readily

Size class: macrofossils

Primary reference: E.H. Barbour. 1914. Carboniferous eurypterids of Nebraska . American Journal of Science S4-38(228):507-510 [R. Plotnick/R. Plotnick]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 225376: authorized by Roy Plotnick, entered by Roy Plotnick on 05.05.2022

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Euchelicerata
 Eurypterida - Adelophthalmidae
Adelophthalmus nebraskensis
Adelophthalmus nebraskensis Barbour 1914 eurypterid
 Radiatopses - Medullosaceae
Neuropteris sp.
Neuropteris sp. Brongniart 1828
Polypodiopsida
 Equisetales - Equisetidae
Asterophyllites sp.
Asterophyllites sp. Brongniart 1828
Calamites
  -
Calamites sp.
Calamites sp. Schlotheim 1820