'Entomis' migrans Community, Upper Ludlow (Silurian of Italy)

Where: Sardinia, Italy (39.4° N, 8.5° E: paleocoordinates 61.0° S, 53.3° E)

• coordinate based on political unit

• local area-level geographic resolution

When: M. fritschi linearis zone, Ludfordian (425.6 - 423.0 Ma)

• I have called international stage based on biozone given by authors.

Environment/lithology: marine; limestone and shale

• General for this succession of communities: "Unlike the Carnic Alps, the Silurian-Devonian of Sardinia displays a far less variegated facies picture, being almost exclusively developed in shallow to deeper pelagic environments, with the minor exception of the Emsian Mt. Padenteddu mud mound." For this community: "This community seems to be restricted to shallower water than the closely related Bolbozoe bohemica Community [PBDB coll. 26127] (BA 3-4 as contrasted with 4-5, where redeposition of fossils by paleocurrent activity occurred)."
• No lithologic data given for this community. Entire sequence is limestone-shale succession.

Size class: macrofossils

Primary reference: A. Ferretti, M. Gnoli, and G. B. Vai. 1999. Silurian to Lower Devonian communities of Sardinia. In A. J. Boucot and J. D. Lawson (eds.), Paleocommunities--a case study from the Silurian and Lower Devonian 271-281 [M. Foote/M. Foote/S. Kolbe]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 26160: authorized by Michael Foote, entered by Michael Foote on 07.10.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Ostracoda
 Cypridinida - Bolbozoidae
""Entomis" migrans" = Entomozoe, ""Entomis" lamarmorai" = Entomozoe, ""Entomis" ichnusae" = Entomozoe, ""Entomis" meneghini" = Entomozoe, Bolbozoe bohemica
""Entomis" migrans" = Entomozoe ostracod
""Entomis" lamarmorai" = Entomozoe ostracod
""Entomis" ichnusae" = Entomozoe ostracod
""Entomis" meneghini" = Entomozoe ostracod
Cephalopoda
 Dissidocerida - Geisonoceratidae
Geisonoceras sp.
Geisonoceras sp. Hyatt 1884
 Orthocerida - Arionoceratidae
Arionoceras sp.
Arionoceras sp. Barskov 1966
 Orthocerida - Orthoceratidae
Michelinoceras sp., ? Merocycloceras sp.
Michelinoceras sp. Foerste 1932
? Merocycloceras sp. Ristedt 1968
 Orthocerida - Sphaerorthoceratidae
"Parasphaerorthoceras" sp., Hemicosmorthoceras sp., Akrosphaerorthoceras sp.
Hemicosmorthoceras sp. Ristedt 1968
Bivalvia
 Cyrtodontida - Cardiolidae
Cardiolidae indet.
Cardiolidae indet. Hoernes 1884 clam
Brachiopoda
  -
Brachiopoda indet.
Brachiopoda indet. Cuvier 1805
Graptolithina
  -
Graptolithina indet.
Conodonta
 Ozarkodinida - Pterospathodontidae
Polygnathoides siluricus
 Ozarkodinida -
Ozarkodina confluens
Ozarkodina confluens Rhodes 1953 conodont
 Ozarkodinida - Kockelellidae
"Kockelella absidata" = Kockelella ortus, Kockelella variabilis
"Kockelella absidata" = Kockelella ortus Walliser 1964 conodont
Kockelella variabilis Walliser 1957 conodont
 Ozarkodinida - Spathognathodontodae
"Ozarkodina excavata" = Wurmiella excavata
"Ozarkodina excavata" = Wurmiella excavata Branson and Mehl 1933 conodont
 Prioniodontida -
Oulodus siluricus
Oulodus siluricus Branson and Mehl 1933 conodont