Type section at Little Bob quarry, south of Bobcaygeon, Lake Simcoe Area (Ordovician of Canada)

Where: Ontario, Canada (44.5° N, 78.6° W: paleocoordinates 25.1° S, 54.7° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Plectodina tenuis conodont zone, Kirkfield Member (Bobcaygeon Formation), Kirkfieldian (460.9 - 449.5 Ma)

• Was middle member, but this is now Kirkfield

• member-level stratigraphic resolution

Environment/lithology: deep subtidal; brown, gray limestone

• Deepening waters and quiet conditions of sedimentation.
• "20 feet of gray and brown, very fine grained to sublithographic, sparsely fossiliferous limestone, with some fine-grained limestone in the upper part. The strata weather into grey beds, 2 to 10 inches thick, which are generally more massive than those of the lower and upper members."

Size classes: macrofossils, microfossils

Collection methods: chemical,

Primary reference: B. A. Liberty. 1969. Palaeozoic geology of the Lake Simcoe Area, Ontario. Geological Survey of Canada Memoirs (355)1-201 [S. Holland/T. Hanson/T. Hanson]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 26192: authorized by Steven Holland, entered by Tori Hanson on 07.10.2002, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

 Corallinales - Corallinophycidae
Solenopora "compacta" Dybowski 1877
 Labechiida - Stromatoceriidae
Stromatocerium sp. Hall 1847 stromatoporoid sponge
 Stauriida - Lambelasmatidae
Lambeophyllum profundum Conrad 1843 horn coral
 Stauriida - Columnariidae
 Stauriida - Streptelasmatidae
Streptelasma corniculum Hall 1847 horn coral
 Sarcinulida - Billingsariidae
Foerstephyllum halli tabulate coral
 Sarcinulida - Syringophyllidae
"Calapoecia canadensis" = Calapoecia coxi
"Calapoecia canadensis" = Calapoecia coxi Bassler 1950 tabulate coral
 Lichenariida - Lichenariidae
Lichenaria typa Winchell and Schuchert 1895 tabulate coral
 Trepostomida -
 Trepostomida - Monticuliporidae
Prasopora simulatrix
Prasopora simulatrix orientalis
 Cryptostomata - Rhinidictyidae
 Leperditicopida - Leperditiidae
Leperditia sp. Rouault 1851 ostracod
 Asaphida - Asaphidae
Isotelus iowensis Owen 1852 trilobite
Isotelus gigas Dekay 1824 trilobite
Isotelus cf. maximus Locke 1838 trilobite
 Phacopida - Cheiruridae
"Ceraurus dentatus" = Gabriceraurus dentatus, Ceraurus pleurexanthemus, "Ceraurus cf. bispinosus" = Bufoceraurus bispinosus
"Ceraurus dentatus" = Gabriceraurus dentatus Raymond and Barton 1913 trilobite
Ceraurus pleurexanthemus Green 1832 trilobite
"Ceraurus cf. bispinosus" = Bufoceraurus bispinosus Raymond and Barton 1913 trilobite
 Phacopida - Pterygometopidae
Achatella sp. Delo 1935 trilobite
cf. Achatella achates Billings 1860 trilobite
"Calliops callicephalus" = Calyptaulax callicephalus Hall 1847 trilobite
 Corynexochida - Illaenidae
Bumastus sp. Murchison 1839 trilobite
 Proetida - Bathyuridae
"Raymondites ingalli" = Bathyurus (Raymondites) ingalli Raymond 1913 trilobite
Raymondites ingalli and Raymondites cf. ingalli
"Raymondites cf. spiniger" = Bathyurus (Raymondites) spiniger Hall 1847 trilobite
 Orthocerida - Orthoceratidae
"Orthoceras" sp. Breynius 1832
 Actinocerida - Gonioceratidae
Gonioceras sp. Hall 1847
 Pseudorthocerida - Spyroceratidae
 Bellerophontida - Sinuitidae
Sinuites cancellatus Hall 1847 snail
Sinuites cancellatus and Sinuites cf. cancellatus liratus
 Bellerophontida - Bucaniidae
Phragmolites compressus Conrad 1838 snail
Bucania halli Ulrich and Scofield 1897 snail
 Bellerophontida - Pterothecidae
Pterotheca sp. Salter 1853 snail
 Pleurotomariida - Eotomariidae
"Eotomaria cf. larvata" = Paraliospira larvata
"Eotomaria cf. larvata" = Paraliospira larvata Salter 1859 snail
 Euomphalina - Platyceratidae
Cyclonema cf. cushingi Ruedemann 1912 snail
 Euomphalina - Macluritidae
"Maclurites logani" = Maclurina logani
"Maclurites logani" = Maclurina logani Salter 1852 snail
 Euomphalina - Lesueurillidae
"Eccyliomphalus cf. ottawaensis" = Eccyliopterus ottawaensis
"Eccyliomphalus cf. ottawaensis" = Eccyliopterus ottawaensis Billings 1860 snail
 Euomphalina - Helicotomidae
Helicotoma cf. planulata Salter 1859 snail
 Murchisoniina - Murchisoniidae
"Hormotoma salteri" = Cyrtostropha salteri
"Hormotoma salteri" = Cyrtostropha salteri Ulrich and Scofield 1897 snail
Hormotoma salteri canadensis
 Murchisoniina - Hormotomidae
Hormotoma gracilis Hall 1847 snail
Hormotoma simplex Wilson 1932 snail
Hormotoma simplex and Hormotoma simplex paquettensis
 Murchisoniina - Straparollinidae
"Lophospira procris" = Straparollina procris Billings 1865 snail
cf. Daidia cerithioides Salter 1859 snail
 Murchisoniina - Loxonematidae
"Hormotoma trentonensis" = Omospira trentonensis
"Hormotoma trentonensis" = Omospira trentonensis Ulrich and Scofield 1897 snail
Hormotoma trentonensis and Hormotoma trentonensis crassa
 Murchisoniina - Subulitidae
Subulites conradi, "Hormotoma bellicincta" = Eroicaspira bellicincta
Subulites conradi Ulrich and Scofield 1897 snail
"Hormotoma bellicincta" = Eroicaspira bellicincta Hall 1847 snail
 Murchisoniina - Lophospiridae
Paupospira burginensis2 Ulrich and Scofield 1897 snail
Lophospira serrulata Salter 1859 snail
Lophospira perangulata Hall 1847 snail
 Murchisoniina - Trochonematidae
"Trochonema umbilicatum" = Trochonema umbilicata
"Trochonema umbilicatum" = Trochonema umbilicata Hall 1847 snail
 Protobranchia - Ctenodontidae
Ctenodonta nasuta Hall 1847 clam
Ctenodonta nasuta robusta
 Myalinida - Ambonychiidae
Ambonychia sp. Hall 1847 clam
 Cyrtodontida - Cyrtodontidae
"Whitella subtruncata" = Cyrtodontula
"Whitella subtruncata" = Cyrtodontula clam
 Strophomenida - Rafinesquinidae
Rafinesquina sp. Hall and Clarke 1892
"Rafinesquina alata" = Rafinesquina alternata alata1 Wilson 1944
Rafinesquina alternata alata and Rafinesquina alternata intermedia and Rafinesquina alternata plana and Rafinesquina alternata semiquadrata and Rafinesquina alternata transversa
 Strophomenida - Strophomenidae
Opikina rugosa Wilson 1921
Opikina rugosa and Opikina rugosa avita
Opikina septata Salmon 1942
Opikina septata borealis
Opikina platys Wilson 1944
? Strophomena millionensis
?Strophomena millionensis affinis
Strophomena magna Wilson 1945
Strophomena dignata Fenton 1928
Strophomena planumbona Hall 1847
Strophomena planumbona and Strophomena planumbona praecipita
Strophomena incurvata Shephard 1838
 Strophomenida - Sowerbyellidae
"Sowerbyella sericea" = Sowerbyella (Sowerbyella) sericea Sowerby 1839
 Orthida - Dalmanellidae
 Orthida - Hesperorthidae
 Protorthida - Skenidiidae
 Rhynchonellida - Ancistrorhynchidae
 Rhynchonellida - Rhynchotrematidae
 Atrypida - Anazygidae
"Zygospira recurvirostris" = Anazyga recurvirostra
"Zygospira recurvirostris" = Anazyga recurvirostra Hall 1847
 Pentamerida - Camerellidae
 Lingulida - Obolidae
  - Receptaculitidae