Fish-Phyllopod Community, Early Lochkovian, Central Taimyr (Devonian of Russian Federation)

Where: Russian Federation (73.8° N, 91.0° E: paleocoordinates 18.6° N, 4.9° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Lochkovian (419.2 - 410.8 Ma)

• Belyi Kamen subhorizon.

Environment/lithology: marine; argillaceous carbonate and siltstone

• "The 500 m thick section is built up predominantly of argillaceous carbonate deposits. The base contains gypsum, argillaceous dolomites, siltstones (Belyi Kamen subhorizon, Ust' Taryeya horizon, the equivalent of the Lower Lochkovian) grading up section into rhythmically interbedded carbonate and argillaceous rocks (the Uryun and Tolbat subhorizons of the Ust' Tareya horizon; Daksan, Yunkhoda, Taribigai subhorizons, the Zlobin horizon; the Trigonirhynchia postventricos and Favosites regularissimus zones, equivalents of the Lochkovian-Zlichovian), there are also variegated siltstones, marls, dolomites (the Wijdeaspis arctica zone, the end of the Lower Devonian. The section shows a cyclic development...(carbonate beds with basal argillaceous units) while the general trend was regressive-transgressive-regressive...absence of channel facies...There are a number of communities showing a trend in the development of environments from gypsiferous lagoons to open marine basins, beginning basally with A and extending upwards into F, namely: A. Fish-Phyllopod; B. Lingula-Phyllopod; C. Pelecypod-Phyllopod; D. Eurypterid-Pelecypod; E. Howellella-Tiverina; F. Rhombopora-Hebetoechia...hypersaline at bottom to normal marine at top." This unit interpreted as hypersaline, BA 1. Gypsum present.
• See geology.

Primary reference: S. V. Cherkesova. 1999. Lower Early Devonian communities of Taimyr. In A. J. Boucot and J. D. Lawson (eds.), Paleocommunities--a case study from the Silurian and Lower Devonian 458-461 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 26668: authorized by Michael Foote, entered by Michael Foote on 23.10.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Lingulata
 Lingulida - Lingulidae
Lingula sp. BruguiƩre 1797
Eurypterida
 Eurypterida -
Eurypterida indet. Burmeister 1843 eurypterid
Deuteropoda
  -
Ostracoda indet. Latreille 1802 ostracod
Ostracoda
 Leperditicopida - Leperditiidae
Leperditia sp. Rouault 1851 ostracod
Branchiopoda
 Phyllopoda -
Phyllopoda indet. branchiopod
Pteraspidomorphi
 Pteraspidomorphes -