Two Rivers Bay, Somerset Island (Silurian of Canada)

Where: Nunavut, Canada (73.0° N, 91.7° W: paleocoordinates 0.2° N, 32.6° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Douro Formation, Ludlow (427.4 - 423.0 Ma)

• formerly referred to Read Bay Formation

• bed-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; lithified limestone

• bioherm with rubbly-weathering argillaceous limestone and bioclastic limestone as flanking beds

Size class: macrofossils

Primary reference: J. K. Rigby and O. A. Dixon. 1979. Sponge fauna of the Upper Silurian Read Bay Formation, Somerset Island, District of Franklin, Arctic Canada. 53(3):587-627 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 119860: authorized by Wolfgang Kiessling, entered by Uta Merkel on 02.11.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Demospongiae
 Lithistida - Anthaspidellidae
Somersetella conicula n. gen. n. sp. Rigby and Dixon 1979 demosponge
Somersetella digitata n. sp. Rigby and Dixon 1979 demosponge
Stromatoporoidea
 Stromatoporoidea -
Stromatoporoidea indet. stromatoporoid sponge
Anthozoa
 Heliolitida - Heliolitidae
Heliolites sp. Dana 1846 tabulate coral
 Auloporida - Auloporidae
Aulopora sp. Goldfuss 1829 tabulate coral
 Auloporida - Syringoporidae
Syringopora sp. Goldfuss 1826 tabulate coral
 Favositida - Alveolitidae
Alveolites sp. Lamarck 1801 tabulate coral
 Favositida - Coenitidae
Coenites sp. Eichwald 1829 tabulate coral
 Favositida - Favositidae
Favosites sp. Lamarck 1816 tabulate coral
 Stauriida - Mucophyllidae
Mucophyllum sp. Etheridge 1894 horn coral
Trilobita
 Phacopida - Encrinuridae
Encrinurus sp. Emmrich 1844 trilobite
Rhynchonellata
 Rhynchonellida - Machaerariidae
Ferganella sp. Nikiforova 1937
 Atrypida - Septatrypidae
Atrypoidea sp. Mitchell and Dun 1920