"Paris Biota" (NN) (Triassic of the United States)

Where: Elko County, Nevada (40.1° N, 114.8° W)

• Paleocoordinates: 24.5° N, 35.1° W (Wright 2013)

• coordinate estimated from map

When: Thaynes Group, Spathian (251.3 - 247.2 Ma)

• immediately after the Smithian/Spathian boundary; Thaynes Group characterized by alternating limestones and shales

Environment/lithology: offshore; shale

• deeper offshore depositional environment
• shales, finely laminated; based on the alternation between erosion surfaces associated with HCS structures and thin-bedded limestones and marls

Size classes: macrofossils, mesofossils

Preservation: mold/impression, adpression, original phosphate

Primary reference: C. P. A. Smith, T. Laville, E. Fara, G. Escarguel, N. Olivier, E. Vennin, N. Goudemand, K. G. Bylund, J. F. Jenks, D. A. Stephen, M. Hautmann, S. Charbonnier, L. J. Krumenacker and A. Brayard. 2021. Exceptional fossil assemblages confirm the existence of complex Early Triassic ecosystems during the early Spathian. Scientific Reports 11(19657) [B. Seuss/B. Seuss/M. Clapham]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 211753: authorized by Barbara Seuss, entered by Barbara Seuss on 27.07.2020

Creative Commons license: CC0 (CC0)

Taxonomic list

unclassified
  -
Xiphosura
 Xiphosurida - Limulidae
Limulidae indet. Leach 1819 horseshoe crab
Thylacocephala
  -
Ligulacaris parisiana Charbonnier 2019
Malacostraca
 Decapoda -
Penaeoidea indet. Rafinesque 1815 decapod
penaeoid shrimp
Bivalvia
  -
Bivalvia indet. Linnaeus 1758 clam
88% of sampled specimens, absence of infaunal taxa
 Pectinida - Pectinoidae
Pleuronectites meeki Newell and Boyd 1995 scallop
 Pectinida - Aviculopectinidae
Eumorphotis sp. Bittner 1901 scallop
Eumorphotis ? multiformis Bittner 1899 scallop
Eumorphotis cf. ericius Hautmann et al. 2013 scallop
 Pectinida - Hunanopectinidae
Leptochondria sp. Bittner 1891 scallop
Leptochondria occidanea Meek 1877 scallop
Leptochondria ? virgalensis Wittenburg 1908 scallop
Osteichthyes
 Palaeonisciformes - Bobasatraniidae
Bobasatrania sp. White 1932
Coelacanthimorpha
 Coelacanthiformes - Coelacanthidae
Coelacanthidae indet. Agassiz 1843 coelacanth