GSC 55050 - Beach south of Back Bay Village, ½ mile NW of westend Douglas Isl. (Silurian of Canada)

Also known as Unnamed beds of map unit 4, St. George map-area (1094A)

Where: New Brunswick, Canada (45.1° N, 66.9° W: paleocoordinates 37.3° S, 35.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Back Bay Formation, Telychian (438.5 - 433.4 Ma)

• later named Back Bay formation. C4-C5 age of old scales.

• formation-level stratigraphic resolution

Environment/lithology: limestone

Size class: macrofossils

Preservation: cast

Reposited in the GSC

Primary reference: A. J. Boucot, J. G. Johnson, C. Harper and V.G. Walmsley. 1967. Silurian brachiopods and gastropods of southern New Brunswick. Geological Survey of Canada Bulletin 140(1):1-45 [P. Wagner/P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 68834: authorized by Pete Wagner, entered by Pete Wagner on 09.02.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

Strophomenata
 Productida - Strophochonetidae
? Protochonetes sp. Muir-Wood 1962
 Orthotetida - Chilidiopsidae
"Chilidiopsis spp." = Coolinia
"Chilidiopsis spp." = Coolinia Bancroft 1949
 Strophomenida - Sowerbyellidae
 Strophomenida - Leptestiidae
Leangella sp. Opik 1933
 Strophomenida - Leptostrophiidae
 Strophomenida - Rafinesquinidae
Leptaena spp. Dalman 1828
 Strophomenida - Amphistrophiidae
Amphistrophia sp. Hall and Clarke 1892
 Strophomenida - Strophonellidae
"Strophonella cf. euglypha" = Strophoprion euglypha
"Strophonella cf. euglypha" = Strophoprion euglypha Dalman 1828
 Strophomenida - Strophomenidae
Rhynchonellata
 Athyridida - Meristellidae
Meristina sp. Hall 1867
 Athyridida - Nucleospiridae
Nucleospira sp. Hall 1859
 Spiriferida - Cyrtiidae
Cyrtia sp. Dalman 1828
Eospirifer sp. Schuchert 1913
Macropleura sp. Boucot 1963
 Spiriferida - Delthyrididae
Howellella "sp. 1" Kozlowski 1946
 Pentamerida - Parastrophinidae
Anastrophia sp. Hall 1867
 Pentamerida - Gypidulidae
Sieberella sp. Oehlert 1887
 Pentamerida - Pentameridae
Pentamerus sp. Sowerby 1813
 Protorthida - Skenidiidae
Skenidioides sp. Schuchert and Cooper 1931
 Atrypida - Atrypidae
Plectatrypa imbricata Sowerby and Murchison 1839
Atrypa "reticularis" Linnaeus 1758
 Rhynchonellida - Machaerariidae
 Rhynchonellida - Rhynchotrematidae
? Stegerhynchus spp. Foerste 1909
 Rhynchonellida - Hebetoechiidae
? Sphaerirhynchia sp. Cooper and Muir-Wood 1951
 Orthida - Rhipidomellidae
Dalejina cf. hybrida Sowerby 1839
 Orthida - Dicoelosiidae
"Dicaelosia sp." = Dicoelosia
"Dicaelosia sp." = Dicoelosia King 1850
 Orthida - Dalmanellidae
Isorthis sp., "Resserella cf. concavoconvexa" = Visbyella concavoconvexa
Isorthis sp. Kozlowski 1929
"Resserella cf. concavoconvexa" = Visbyella concavoconvexa Twenhofel 1928
 Orthida - Hesperorthidae
Craniata
 Trimerellida - Trimerellidae
Gastropoda
 Euomphalina - Euomphalidae
Euomphalopterus aff. alatus Wahlenberg 1821 snail
 Euomphalina - Oriostomatidae
Oriostoma cf. globosum von Schlotheim 1820 snail
 Murchisoniina - Phanerotrematidae
"Pseudoscalites cf. lindstroemi" = Phanerotrema lindstroemi
"Pseudoscalites cf. lindstroemi" = Phanerotrema lindstroemi Boucot et al. 1967 snail