'Pasceolus' exilis Community, Lower Ludlovian (Silurian of Russian Federation)

Also known as Reef 3733

Where: Russian Federation (60.7° N, 60.4° E: paleocoordinates 1.3° N, 8.6° E)

• coordinate based on political unit

• basin-level geographic resolution

When: Ludlow (427.4 - 423.0 Ma)

Environment/lithology: reef, buildup or bioherm; shelly/skeletal, gray reef rocks and limestone

• Comm. formed in reef flat areas, relatively screened from waves and turbulence, or possibly below wave base. A BA 3 position is suggested, which is consistent with the presence of Brooksina.
• "Lower Ludlovian reef limestones...Pasceolus limestones have a very distinctive appearance. The white, bright gray, or pink limestone consists of globose, pear shaped, commonly pea-sized or larger calcified thallei never occur in situ, but show no sign of extensive transport....lenticular or bed-like limestone bodies...Associated...are other types of organogenic limestones..."

Primary reference: V. P. Sapelnikov, O. V. Bogoyavlenskaya, L. I. Mizens and V. P. Shuysky. 1999. Silurian and Early Devonian benthic communities of the Ural-Tien Shan region. In A. J. Boucot and J. D. Lawson (eds.), Paleocommunities--a case study from the Silurian and Lower Devonian 510-544 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 23696: authorized by Michael Foote, entered by Michael Foote on 18.07.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

 Palaeocopida -
Severella sp. ostracod
 Spiriferida - Reticulariidae
"Proreticularia sp." = Alaskospira
"Proreticularia sp." = Alaskospira Kirk and Amsden 1952
 Pentamerida - Gypidulidae
Gypidula sp. Hall 1867
 Pentamerida - Clorindidae
Clorinda sp. Barrande 1879
 Pentamerida - Subrianidae
 Pentamerida - Pentameridae
Harpidium sp. Kirk 1925
Brooksina sp. Kirk 1922
 Atrypida - Lissatrypidae
Atrypoidea sp. Mitchell and Dun 1920
Lissatrypa sp. Twenhofel 1914
 Dasycladales -
Pasceolus exilis
dasycladacean (tribe Cyclocrinae); genus name in quotes; may be Cyclocrinus