Lasiocrinus Assoc., Thacher Mbr., Manlius Fm., Cementon, NY (Devonian of the United States)

Where: New York (42.1° N, 73.9° W: paleocoordinates 35.7° S, 33.4° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Thacher Member (Manlius Formation), Lochkovian (419.2 - 410.8 Ma)

• Early Devonian (early Gedinnian, Lochkovian). Beds near middle of Thacher Member.

• member-level stratigraphic resolution

Environment/lithology: lagoonal or restricted shallow subtidal; grainstone and argillaceous lime mudstone

• "The Manlius has bee interpreted as peritidal to lagoonal. Desiccation cracks,, birdseye (fenestral) fabric; cryptalgal laminites and intraclast conglomerates...portions upper intertidal to supratidal...Ribbon limestones interpretd as storm silt and fine sand layers washed into a 'lagoonal' environment: the latter situated between carbonate tidal flats and offshore shoal settings...A nearshore, somewhat unstable silty environment, is indicated; generally low energy background conditions interrupted by frequent storm events...BA 2"

•

•2003:05:03 SEP environmental call based on given description

• "Lasiocrinus occur in interbedded 'ribbon limestone' facies; typically found on bedding planes of thin (2-4 cm) lamintaed calcisiltite beds interbedded with fine-grained argillaceous lime mudstone and shale layers"

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 26689: authorized by Michael Foote, entered by Michael Foote on 24.10.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Crinoidea
 Dendrocrinida - Mastigocrinidae
Lasiocrinus scoparius
 Monobathrida - Scyphocrinitidae
Scyphocrinites sp.
Scyphocrinites sp. Zenker 1833 Sea lily
"transported?"
Stylophora
 Mitrata - Anomalocystitidae
Anomalocystites sp.
Lophophorata
 Tentaculitida - Tentaculitidae
Tentaculites sp.
Tentaculites sp. von Schlotheim 1820
Bryozoa
  -
Bryozoa indet.
Bryozoa indet. Ehrenberg 1831
ramose and encrusting forms
Rhynchonellata
 Spiriferida - Delthyrididae
Howellella vanuxemi
Strophomenata
 Strophomenida - Amphistrophiidae
Mesodouvillina varistriata
Bivalvia
 Autobranchia -
Pterioida indet.
Pterioida indet. Newell 1965 clam
Ostracoda
 Leperditicopida - Leperditiidae
Leperditiidae indet.
Leperditiidae indet. Jones 1856 ostracod