Trematocystis-Pustulocystis Assoc., Lower Osgood (Silurian to of the United States)

Where: Indiana (39.0° N, 85.3° W: paleocoordinates 26.4° S, 53.8° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Osgood Formation, Telychian to Telychian (438.5 - 430.5 Ma)

• "?Latest Llandovery to Early Wenlockian, Lower Shales, Lower Osgood Member, Salamonie Dolomite"

• member-level stratigraphic resolution

Environment/lithology: deep subtidal; glauconitic, pyritic, calcareous siltstone

• See lithology
• "Sparse whole fossils and scattered, badly sorted debris patches in a calcareous siltstone matrix...common pyrite and less common glauconite and limonite...signs of hard substrate attachment...soft bottom, perhaps relatively rapid sedimentation...BA 4-5"

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 26807: 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
Rhynchonellata
 Athyridida - Meristidae
Merista cf. nitida
 Atrypida - Atrypidae
Atrypa reticularis
Atrypa reticularis Linnaeus 1758
Craniata
 Craniida - Craniidae
Petrocrania sp.
Petrocrania sp. Raymond 1910
Bryozoa
  -
Bryozoa indet.
Bryozoa indet. Ehrenberg 1831
Stenolaemata
 Cryptostomata - Rhinoporidae
Lichenalia sp.
Lichenalia sp. Hall 1851
Polychaeta
 Sabellida - Serpulidae
Spirorbis spp.
Spirorbis spp. Daudin 1800
Crinoidea
  -
Crinoidea indet.
Crinoidea indet. Miller 1821 Sea lily
 Sphaeronitida - Holocystitidae
Trematocystis sp., Pustulocystis ornatissimus
Anthozoa
 Favositida - Favositidae
Favosites sp.
Favosites sp. Lamarck 1816 tabulate coral