Pisocrinus(P.) gemmiformis-Astraeospongium Assoc., Lego Lst, McCory Lane Roadcut (Silurian to of the United States)

Where: Tennessee (38.1° N, 87.0° W: paleocoordinates 28.7° S, 52.7° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Lego Limestone Member (Wayne Formation), Wenlock to Wenlock (433.4 - 423.0 Ma)

• Lego Limestone Member, Wayne Formation: top 2 m, mostly from shaley limestone unit 3 cm thick near top of unit. Kockelella amsdeni Zone-K. variabilis Zone

• group of beds-level stratigraphic resolution

Environment/lithology: deep subtidal ramp; gray, calcareous shale and argillaceous limestone

• "Crinods and brachiopods may be preserved intact...but most frequently are diarticulated...root systems uncommon...little evidence of current winnowing or sorting, but the concentratioon of whole fossils in particular units may indicate either rare sstorm disturbance or a storm-caused sudden increase in sed. rate. Detrital limonite and partly oxidized glauconite grains up to sand size are common. Burrows locally common in some horizons....BA 4-5, somewhat restricted environment.."

•SEP environmental call based on given info

• "The most frequent lithology is a calcareous brownish-gray to reddish shale, often intercalated with thin beds of similarly colored shaley limestone.. In other occurrences the terrigenous component is definitely subordinate. Skeletal debris is often sparese..."

Collection methods: Taxa in table 45.46, which gives abundances.

Primary reference: T. J. Frest, C. E. Brett, and B. J. Witzke. 1999. Caradocian-Gedinnian echinoderm associations of Central and Eastern North America. Paleocommunities--a case study from the Silurian and Lower Devonian 638-783 [M. Foote/K. Koverman/P. Wagner]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 26817: authorized by Michael Foote, entered by Michael Foote on 04.11.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Anthozoa
 Auloporida - Auloporidae
Auloporella indet.
Auloporella indet. Grubbs 1939 tabulate coral
 Rugosa -
Rugosa indet.
Rugosa indet. horn coral
Heteractinida
 Octactinellida - Astraeospongiidae
Astraeospongium spp.
Cyclocystoidea
  - Cyclocystoididae
Sievertsia sp. n. sp.
Sievertsia sp. n. sp. Smith and Paul 1982
Crinoidea
 Sagenocrinida - Lecanocrinidae
Lecanocrinus cf. pusillus
 Calceocrinida - Calceocrinidae
Eohalysiocrinus cf. stigmatus
 Pisocrinida - Pisocrinidae
Pisocrinus (Pisocrinus) gemmiformis, Parapisocrinus quinquelobus
Parapisocrinus quinquelobus Ausich and Copper 2010 Sea lily
Stylophora
 Mitrata -
Mitrata indet.
Mitrata indet. Jaekel 1918
Asteroidea
  -
Asteroidea indet.
Asteroidea indet. de Blainville 1830 sea star
"starfish plate"
Echinoidea
  -
Echinoidea indet.
Echinoidea indet. Leske 1778 sea urchin
unclassified
  -
Mollusca indet.
Mollusca indet. Linnaeus 1758
progalerinid
Bryozoa
  -
Bryozoa indet.
Bryozoa indet. Ehrenberg 1831
Lophophorata
 Tentaculitida - Cornulitidae
Cornulites sp.
Cornulites sp. Schlotheim 1820
Rhynchonellata
 Protorthida - Skenidiidae
Skenidioides sp.
Skenidioides sp. Schuchert and Cooper 1931
 Orthida - Dicoelosiidae
Dicoelosia sp.
Dicoelosia sp. King 1850
 Orthida - Dalmanellidae
Isorthis sp., Resserella sp.
Isorthis sp. Kozlowski 1929
Resserella sp. Bancroft 1928
 Spiriferida - Cyrtiidae
Striispirifer sp.
Striispirifer sp. Cooper and Muir-Wood 1951
 Spiriferida - Delthyrididae
Howellella sp.
Howellella sp. Kozlowski 1946
 Athyridida - Meristellidae
Meristina sp.
Meristina sp. Hall 1867
 Athyridida - Nucleospiridae
Nucleospira sp.
Nucleospira sp. Hall 1859
 Rhynchonellida - Rhynchotrematidae
Stegerhynchus sp.
Stegerhynchus sp. Foerste 1909
Polychaeta
 Cuniculepadida - Lepidocoleidae
Lepidocoleus sp.
Lepidocoleus sp. Faber 1886 scale worm
Sedentaria
 Sabellida - Serpulidae
Spirorbis sp.
Spirorbis sp. Daudin 1800
Trilobita
  -
Trilobita indet.
Trilobita indet. Walch 1771 trilobite
Cirripedia
  -
Cirripedia indet.
Deuteropoda
  -
Ostracoda indet.
Ostracoda indet. Latreille 1802 ostracod